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Sample records for adult cochlear implant

  1. Cochlear Implant in Adults

    Directory of Open Access Journals (Sweden)

    Jaleh Samadi

    2003-09-01

    Full Text Available Cochlear implant is the result of a great combination and collaboration of engineering and medicine. It is mainly because it has the most conflict with the human nervous system among all prosthesis. Cochlear implant helps a child with profound hearing loss to understand and articulate speech and let an adult person with hearing loss communicate with people by phone. Although these wonderful results could not be seen in all patients, will let us know about the great scientific findings.

  2. Cochlear implantation in older adults.

    Science.gov (United States)

    Lin, Frank R; Chien, Wade W; Li, Lingsheng; Clarrett, Danisa M; Niparko, John K; Francis, Howard W

    2012-09-01

    Cochlear implants allow individuals with severe to profound hearing loss access to sound and spoken language. The number of older adults in the United States who are potential candidates for cochlear implantation (CI) is approximately 150,000 and will continue to increase with the aging of the population. Should CI be routinely recommended for these older adults, and do these individuals benefit from CI? We reviewed our 12-year experience with CI in adults aged ≥60 years (n = 445) at Johns Hopkins Medical Institutions to investigate the impact of CI on speech understanding and to identify factors associated with speech performance. Complete data on speech outcomes at baseline and 1 year post-CI were available for 83 individuals. Our results demonstrate that CI in adults aged ≥60 years consistently improved speech understanding scores, with a mean increase of 60.0% (SD 24.1) on HINT (Hearing in Noise Test) sentences in quiet. The magnitude of the gain in speech scores was negatively associated with age at implantation, such that for every increasing year of age at CI the gain in speech scores was 1.3 percentage points less (95% confidence interval [95% CI], 0.6-1.9) after adjusting for age at hearing loss onset. Conversely, individuals with higher pre-CI speech scores (HINT scores between 40% and 60%) had significantly greater post-CI speech scores by a mean of 10.0 percentage points (95% CI, 0.4-19.6) than those with lower pre-CI speech scores (HINT speech scores obtain the highest speech understanding scores after CI, with possible implications for current United States Medicare policy. Finally, we provide an extended discussion of the epidemiology and impact of hearing loss in older adults. Future research of CI in older adults should expand beyond simple speech outcomes to take into account the broad cognitive, social, and physical functioning outcomes that are likely detrimentally affected by hearing loss and may be mitigated by CI.

  3. The effect of cochlear implant use in postlingually deaf adults

    NARCIS (Netherlands)

    Krabbe, P F; Hinderink, J B; van den Broek, P

    2000-01-01

    OBJECTIVE: To assess the effect of the use of cochlear implants (CI) on the health status of postlingually deaf adults. METHODS: Participants comprised 45 postlingually deaf adult multichannel CI users and 46 deaf candidates on the waiting list for a CI. The latter group acted as control subjects to

  4. Temporal processing in postlingual adult users of cochlear implant

    Directory of Open Access Journals (Sweden)

    Maycon Duarte

    Full Text Available ABSTRACT INTRODUCTION: Postlingual adults demonstrate impressive performance in speech recognition in silence after cochlear implant (CI surgery. However, problems in central hearing abilities remain, which complicates understanding in certain situations, such as in competitive listening and in the perception of suprasegmental aspects of speech. OBJECTIVE: To assess the temporal processing abilities in postlingual adult users of CI. METHODS: Cross-sectional and descriptive study, with a non-probabilistic sample for convenience. The population was divided into two groups. The study group consisted of 12 postlingual adult users of cochlear implants and the control group consisted of 12 adults with normal hearing, matched for age and gender with the control group. The Frequency Pattern Test and the Gaps in Noise test were selected to assess temporal processing. Free-field testing was applied at 50 dB SL. RESULTS: Adult users of cochlear implant attained a mean temporal threshold of 16.33 ms and scored 47.7% in the pattern frequency test; the difference was statistically significant in comparison with the control group. CONCLUSION: It was verified that postlingual adult users of cochlear implants have significant alterations in temporal processing abilities in comparison to adults with normal hearing.

  5. Minimal incision access for pediatric and adult cochlear implantation

    Institute of Scientific and Technical Information of China (English)

    Cui Danmo; Shi Ying; Su Qiaotong; Liu Ting; Han Demin; Li Yongxin

    2014-01-01

    Background Cochlear implant surgery is widely practiced.Minimal incision cochlear implant surgery has been developed with the aims of reducing the impact of surgery on the patient and improving cosmesis while maintaining the low morbidity of conventional wider access approaches.This study aimed to assess the surgical technique and complication rate of minimal incision cochlear implantation (MICI) for children and adults.Methods Data for this study were obtained via a retrospective analysis.Totally 378 patients were included in the study.All patients received minimal incision cochlear implantation,using the skin protector during the process of the operation.The surgical complications of MICI were recorded in a spreadsheet format.The incidence of major and minor complication were analyzed,and appropriate treatment was provided.Results A total of 40 (10.5%) complications were noted in the study.There were 0 life-threatening,9 major,and 31 minor complications.Of the nine major complications,five were device failures,one developed infection and extrusion,and three required receiver-stimulator repositioning.Conclusions MICI is as safe as standard cochlear implantation (SCI) and affords with it other benefits.Eliminating the scalp flap avoids devascularization and minimizes the opportunity of flap infection or necrosis.Complications not related to the flap are similar to SCI.

  6. Cochlear Implants

    Science.gov (United States)

    A cochlear implant is a small, complex electronic device that can help to provide a sense of sound. People who are ... of-hearing can get help from them. The implant consists of two parts. One part sits on ...

  7. Cochlear implantation in late-implanted prelingually deafened adults: changes in quality of life.

    NARCIS (Netherlands)

    Straatman, L.V.; Huinck, W.J.; Langereis, M.C.; Snik, A.F.M.; Mulder, J.J.S.

    2014-01-01

    BACKGROUND: With expanding inclusion criteria for cochlear implantation, the number of prelingually deafened persons who are implanted as adults increases. Compared with postlingually deafened adults, this group shows limited improvement in speech recognition. In this study, the changes in health-re

  8. Experiences from Cochlear Implantation and Auditory Brainstem Implantation in Adults and Children : Electrophysiological Measurements, Hearing Outcomes and Patient Satisfaction

    OpenAIRE

    Lundin, Karin

    2016-01-01

    Cochlear implants (CIs) and auditory brainstem implants (ABIs) are prostheses for hearing used in patients with profound hearing impairment. A CI requires an operational cochlear nerve to function in contrast to an ABI. ABIs were initially designed for adult patients with neurofibromatosis type 2 (NF2), suffering from bilateral vestibular schwannomas. Now ABIs are also used for patients, both adults and children, with congenital cochlear malformations, cochlear nerve hypoplasia/aplasia, and c...

  9. [Bilateral cochlear implantation].

    Science.gov (United States)

    Kronenberg, Jona; Migirov, Lela; Taitelbaum-Swead, Rikey; Hildesheimer, Minka

    2010-06-01

    Cochlear implant surgery became the standard of care in hearing rehabilitation of patients with severe to profound sensorineural hearing loss. This procedure may alter the lives of children and adults enabling them to integrate with the hearing population. In the past, implantation was performed only in one ear, despite the fact that binaural hearing is superior to unilateral, especially in noisy conditions. Cochlear implantation may be performed sequentially or simultaneously. The "sensitive period" of time between hearing loss and implantation and between the two implantations, when performed sequentially, significantly influences the results. Shorter time spans between implantations improve the hearing results after implantation. Hearing success after implantation is highly dependent on the rehabilitation process which includes mapping, implant adjustments and hearing training. Bilateral cochlear implantation in children is recommended as the proposed procedure in spite of the additional financial burden.

  10. Appreciation of music in adult patients with cochlear implants: a patient questionnaire.

    Science.gov (United States)

    Mirza, S; Douglas, S A; Lindsey, P; Hildreth, T; Hawthorne, M

    2003-06-01

    Many cochlear implant candidates express hopes of enjoying music following implantation. Our aim was to assess the appreciation of music after cochlear implantation in adult patients. Thirty-five out of 45 cochlear implantees (78%) from the North East Programme responded to a questionnaire. Only 16 out of 35 patients (46%) listened to music after implantation. Enjoyment of music on a self-assessment scale was graded a mean of 8.7/10 before deafness but only 2.6/10 after implantation. Listening to music after implantation was more likely in younger patients, those with higher speech perception scores and those with a shorter length of deafness, but was not found to be related to gender, type of implant, processing strategy, time since implant or music enjoyment before becoming deaf. Appreciation of music after cochlear implantation is disappointingly low. Future developments in implant technology should strive to improve satisfaction with music listening.

  11. Cochlear Implant

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    In this text, the authors recall the main principles and data ruling cochlear implants. Then, a first circle of technical equipment for assistance is presented. This circle includes: device setting (DS), Electrically evoked Auditory Brainstem Responses (EABR), Neural Response Telemetry (NRT), Stapedial Reflex (SR) and Electrodogram Acquisition (EA). This first cycle becomes more and more important as children are implanted younger and younger; the amount of data available with this assistance makes necessary the use of models (implicit or explicit) to handle this information. Consequently, this field is more open than ever.

  12. Musical FAVORS: Reintroducing music to adult cochlear implant users.

    Science.gov (United States)

    Plant, Geoff

    2015-09-01

    Music represents a considerable challenge for many adult users of cochlear implants (CIs). Around half of adult CI users report that they do not find music enjoyable, and, in some cases, despite enhanced speech perception skills, this leads to considerable frustration and disappointment for the CI user. This paper presents suggestions to improve the musical experiences of deafened adults with CIs. Interviews with a number of adult CI users revealed that there were a number of factors which could lead to enhanced music experiences. The acronym FAVORS (familiar music, auditory-visual access, open-mindedness, and simple arrangements) summarizes the factors that have been identified, which can help CI users in their early music listening experiences. Each of these factors is discussed in detail, along with suggestions for how they can be used in therapy sessions. The use of a group approach (music focus groups) is also discussed and an overview of the approach and exercises used is presented. The importance of live music experiences is also discussed.

  13. Cochlear Implant

    Directory of Open Access Journals (Sweden)

    Mehrnaz Karimi

    1992-04-01

    Full Text Available People with profound hearing loss are not able to use some kinds of conventional amplifiers due to the nature of their loss . In these people, hearing sense is stimulated only when the auditory nerve is activated via electrical stimulation. This stimulation is possible through cochlear implant. In fact, for the deaf people who have good mental health and can not use surgical and medical treatment and also can not benefit from air and bone conduction hearing aids, this device is used if they have normal central auditory system. The basic parts of the device included: Microphone, speech processor, transmitter, stimulator and receiver, and electrode array.

  14. Experiences of adult patients hearing loss postlingually with Cochlear Implant

    Directory of Open Access Journals (Sweden)

    Teresa María Lizcano Tejado

    2013-09-01

    Full Text Available Hearing loss is a significant public health problem. The incidence is difficult to establish because of the lack of data in people under age three, but is estimated about 1 per thousand for severe and profound hearing loss.A cochlear implant (CI is a device that converts sounds into electrical energy that triggers a sensation of hearing. The IC is indicated in patients with severe bilateral sensorineural hearing loss with null or poor benefit use of hearing aids.The general objective of this project is to understand the experiences of adult patients with severe-profound sensorineural hearing loss with IC postlingually throughout the implementation process.A personal vision of those implemented will allow us to learn how to face the possibility to hear and interact with their environment, applying this information to improve health care provided to them and identifying those areas where such assistance should be improved. Also allow us to compare the initial expectations and have been achieved, creating realistic expectations for future candidates.For its development we have designed a qualitative study, based on the principles and procedures of grounded theory, semistructured interviews, participant observation and discussion groups.The data will be analyzed using the software Nudist ViVo 9.

  15. Evaluation of the speech perception in the noise in different positions in adults with cochlear implants

    Directory of Open Access Journals (Sweden)

    Santos, Karlos Thiago Pinheiro dos

    2009-03-01

    Full Text Available Introduction: The most frequent complaint of the cochlear implant users has been to recognize and understand the speech signal in the presence of noise. Researches have been developed on the speech perception of users of cochlear implant with focus on aspects such as the effect of the reduction to the signal/noise ratio in the speech perception, the speech recognition in the noise, with different types of cochlear implant and strategies of speech codification and the effects of the binaural stimulation in the speech perception in noise. Objective: 1-To assess the speech perception in cochlear implant adult users in different positions regarding the presentation of the stimulus, 2-to compare the index of speech recognition in the frontal, ipsilateral and contralateral positions and 3-to analyze the effect of monoaural adaptation in the speech perception with noise. Method: 22 cochlear implant adult users were evaluated regarding the speech perception. The individuals were submitted to sentences recognition evaluation, with competitive noise in the signal/noise ratio +10 decibels in three positions: frontal, ipsilateral and contralateral to the cochlear implant side. Results: The results demonstrated the largest index of speech recognition in the ipsilateral position (100% and the lowest index of speech recognition with sentences in the contralateral position (5%. Conclusion: The performance of speech perception in cochlear implant users is damaged when the competitive noise is introduced, the index of speech recognition is better when the speech is presented ipsilaterally, and it's consequently worse when presented contralaterally to the cochlear implant, and there are more damages in the speech intelligibility when there is only monoaural input.

  16. Improving Access for Pediatric and Adult Cochlear Implant Candidates in Ontario

    Directory of Open Access Journals (Sweden)

    Yvonne Emily James

    2016-10-01

    Full Text Available In 2011, the Ontario Ministry of Health and Long-Term Care announced the one-time allocation of $5.9 million to be shared by cochlear implant programs at five Ontario hospitals. The primary goal of this reform was to address cochlear implant wait times. More specifically, this funding was aimed at reducing adult wait times by 50% and to completely eliminate pediatric waiting lists. Prior to this funding, wait times for pediatric and adult cochlear implants were known to exceed four years. The funding was provided in response to a growing body of research that demonstrates increased speech perception and vocabulary among pediatric recipients, and pressure from parents of children on cochlear implant waiting lists, surgeons and other involved healthcare providers (e.g., auditory verbal therapists, audiologists, and speech language pathologists. The decision to increase funding was also influenced by government stakeholders who believed this one-time investment would be returned as pediatric patients reach adulthood and are better equipped to participate in mainstream (i.e., hearing society. While this one-time funding model has the potential to eliminate wait times for pediatric patients, thereby ensuring these children can access therapeutic services as early as possible, it does not address the future of cochlear implant waiting lists or the capacity of health human resources to absorb this sudden and unprecedented influx of pediatric patients.

  17. The effect of emphasis and position on word identification by adult cochlear implant listeners

    DEFF Research Database (Denmark)

    Morris, David Jackson; Magnusson, Lennart; Jönsson, Radoslava

    2013-01-01

    This study examined the effect of emphasis and word position on word identification by postlingually deafened adult cochlear implant (CI) listeners (n = 20). These participants performed an identification task where Swedish (quasi-) minimal pairs were drawn from sentences and presented in a carri...

  18. Development and application of a health-related quality-of-life instrument for adults with cochlear implants : The Nijmegen cochlear implant questionnaire

    NARCIS (Netherlands)

    Hinderink, J B; Krabbe, P F; Van Den Broek, P

    2000-01-01

    OBJECTIVE: The goal was to develop a quantifiable, self-assessment health-related quality of life (QoL) instrument for use in cochlear implant (CI) users. DESIGN: Three principal domains were distinguished: physical, psychological, and social. Forty-five postlingually deaf adult multichannel CI user

  19. Factors Affecting Open-Set Word Recognition in Adults with Cochlear Implants

    OpenAIRE

    Holden, Laura K.; Finley, Charles C.; Firszt, Jill B.; Holden, Timothy A.; Brenner, Christine; Potts, Lisa G.; Gotter, Brenda D.; Vanderhoof, Sallie S.; Mispagel, Karen; Heydebrand, Gitry; Skinner, Margaret W.

    2013-01-01

    A monosyllabic word test was administered to 114 postlingually-deaf adult cochlear implant (CI) recipients at numerous intervals from two weeks to two years post-initial CI activation. Biographic/audiologic information, electrode position, and cognitive ability were examined to determine factors affecting CI outcomes. Results revealed that Duration of Severe-to-Profound Hearing Loss, Age at Implantation, CI Sound-field Threshold Levels, Percentage of Electrodes in Scala Vestibuli, Medio-later...

  20. COCHLEAR IMPLANTATION PREVALENCE IN ELDERLY

    Directory of Open Access Journals (Sweden)

    A. V. Starokha

    2014-01-01

    Full Text Available Current paper describes an experience of cochlear implantation in elderly. Cochlear implantation has become a widely accepted intervention in the treatment of individuals with severe-to-profound sensorineural hearing loss. Cochlear implants are now accepted as a standard of care to optimize hearing and subsequent speech development in children and adults with deafness. But cochlear implantation affects not only hearing abilities, speech perception and speech production; it also has an outstanding impact on the social life, activities and self-esteem of each patient. The aim of this study was to evaluate the cochlear implantation efficacy in elderly with severe to profound sensorineural hearing loss. There were 5 patients under our observation. Surgery was performed according to traditional posterior tympanotomy and cochleostomy for cochlear implant electrode insertion for all observed patients. The study was conducted in two stages: before speech processor’s activation and 3 months later. Pure tone free field audiometry was performed to each patient to assess the efficiency of cochlear implantation in dynamics. The aim of the study was also to evaluate quality of life in elderly with severe to profound sensorineural hearing loss after unilateral cochlear implantation. Each patient underwent questioning with 36 Item Short Form Health Survey (SF-36. SF-36 is a set of generic, coherent, and easily administered quality-of-life measures. The SF-36 consists of eight scaled scores, which are the weighted sums of the questions in their section. Each scale is directly transformed into a 0-100 scale on the assumption that each question carries equal weight. The eight sections are: physical functioning; physical role functioning; emotional role functioning; vitality; emotional well-being; social role functioning; bodily pain; general health perceptions. Our results demonstrate that cochlear implantation in elderly consistently improved quality of life

  1. MUSIC AND COCHLEAR IMPLANTS

    Institute of Scientific and Technical Information of China (English)

    Mao Yitao; Xu Li

    2013-01-01

    Currently, most people with modern multichannel cochlear implant systems can understand speech in qui-et environment very well. However, studies in recent decades reported a lack of satisfaction in music percep-tion with cochlear implants. This article reviews the literature on music ability of cochlear implant users by presenting a systematic outline of the capabilities and limitations of cochlear implant recipients with regard to their music perception as well as production. The review also evaluates the similarities and differences be-tween electric hearing and acoustic hearing regarding music perception. We summarize the research results in terms of the individual components of music (e.g., rhythm, pitch, and timbre). Finally, we briefly intro-duce the vocal singing of prelingually-deafened children with cochlear implants as evaluated by acoustic measures.

  2. Comparison of Bilateral and Unilateral Cochlear Implantation in Adults : A Randomized Clinical Trial

    NARCIS (Netherlands)

    Smulders, Yvette E; van Zon, Alice; Stegeman, Inge; Rinia, Albert B; Van Zanten, Gijsbert A; Stokroos, Robert J; Hendrice, Nadia; Free, Rolien; Maat, Bert; Frijns, Johan H M; Briaire, Jeroen J; Mylanus, Emmanuel A M; Huinck, Wendy J; Smit, Adriana L; Topsakal, Vedat; Tange, Rinze A; Grolman, Wilko

    2016-01-01

    Importance: The cost of bilateral cochlear implantation (BCI) is usually not reimbursed by insurance companies because of a lack of well-designed studies reporting the benefits of a second cochlear implant. Objective: To determine the benefits of simultaneous BCI compared with unilateral cochlear im

  3. Benefits and Risks of Cochlear Implants

    Science.gov (United States)

    ... Prosthetics Cochlear Implants Benefits and Risks of Cochlear Implants Share Tweet Linkedin Pin it More sharing options ... Cochlear Implants What are the Benefits of Cochlear Implants? For people with implants: Hearing ranges from near ...

  4. Do Adults with Cochlear Implants Rely on Different Acoustic Cues for Phoneme Perception than Adults with Normal Hearing?

    Science.gov (United States)

    Moberly, Aaron C.; Lowenstein, Joanna H.; Tarr, Eric; Caldwell-Tarr, Amanda; Welling, D. Bradley; Shahin, Antoine J.; Nittrouer, Susan

    2014-01-01

    Purpose: Several acoustic cues specify any single phonemic contrast. Nonetheless, adult, native speakers of a language share weighting strategies, showing preferential attention to some properties over others. Cochlear implant (CI) signal processing disrupts the salience of some cues: In general, amplitude structure remains readily available, but…

  5. A Longitudinal Study in Adults with Sequential Bilateral Cochlear Implants: Time Course for Individual Ear and Bilateral Performance

    Science.gov (United States)

    Reeder, Ruth M.; Firszt, Jill B.; Holden, Laura K.; Strube, Michael J.

    2014-01-01

    Purpose: The purpose of this study was to examine the rate of progress in the 2nd implanted ear as it relates to the 1st implanted ear and to bilateral performance in adult sequential cochlear implant recipients. In addition, this study aimed to identify factors that contribute to patient outcomes. Method: The authors performed a prospective…

  6. Biomaterials in cochlear implants

    Directory of Open Access Journals (Sweden)

    Lenarz, Thomas

    2009-01-01

    Full Text Available The cochlear implant (CI represents, for almost 25 years now, the gold standard in the treatment of children born deaf and for postlingually deafened adults. These devices thus constitute the greatest success story in the field of ‘neurobionic’ prostheses. Their (now routine fitting in adults, and especially in young children and even babies, places exacting demands on these implants, particularly with regard to the biocompatibility of a CI’s surface components. Furthermore, certain parts of the implant face considerable mechanical challenges, such as the need for the electrode array to be flexible and resistant to breakage, and for the implant casing to be able to withstand external forces. As these implants are in the immediate vicinity of the middle-ear mucosa and of the junction to the perilymph of the cochlea, the risk exists – at least in principle – that bacteria may spread along the electrode array into the cochlea. The wide-ranging requirements made of the CI in terms of biocompatibility and the electrode mechanism mean that there is still further scope – despite the fact that CIs are already technically highly sophisticated – for ongoing improvements to the properties of these implants and their constituent materials, thus enhancing the effectiveness of these devices. This paper will therefore discuss fundamental material aspects of CIs as well as the potential for their future development.

  7. [Neurotology and cochlear implants].

    Science.gov (United States)

    Merchán, Miguel A

    2015-05-01

    In this review we analyse cochlear implantation in terms of the fundamental aspects of the functioning of the auditory system. Concepts concerning neuronal plasticity applied to electrical stimulation in perinatal and adult deep hypoacusis are reviewed, and the latest scientific bases that justify early implantation following screening for congenital deafness are discussed. Finally, this review aims to serve as an example of the importance of fostering the sub-specialty of neurotology in our milieu, with the aim of bridging some of the gaps between specialties and thus improving both the knowledge in the field of research on auditory pathologies and in the screening of patients. The objectives of this review, targeted above all towards specialists in the field of otorhinolaryngology, are to analyse some significant neurological foundations in order to reach a better understanding of the clinical events that condition the indications and the rehabilitation of patients with cochlear implants, as well as to use this means to foster the growth of the sub-specialty of neurotology.

  8. Judgment of musical emotions after cochlear implantation in adults with progressive deafness.

    Directory of Open Access Journals (Sweden)

    Emmanuèle eAmbert-Dahan

    2015-03-01

    Full Text Available While cochlear implantation is rather successful in restoring speech comprehension in quiet environments (Nimmons et al., 2008, other auditory tasks, such as music perception, can remain challenging for implant users. Here, we tested how patients who had received a cochlear implant (CI after post-lingual progressive deafness perceive emotions in music. Thirteen adult CI recipients with good verbal comprehension (dissyllabic words ≥ 70% and 13 normal hearing participants matched for age, gender, and education listened to 40 short musical excerpts that selectively expressed fear, happiness, sadness, and peacefulness (Vieillard et al., 2008. The participants were asked to rate (on a 0 to 100 scale how much the musical stimuli expressed these four cardinal emotions, and to judge their emotional valence (unpleasant-pleasant and arousal (relaxing-stimulating. Although CI users performed above chance level, their emotional judgments (mean correctness scores were generally impaired for happy, scary, and sad, but not for peaceful excerpts. CI users also demonstrated deficits in perceiving arousal of musical excerpts, whereas rating of valence remained unaffected. The current findings indicate that judgments of emotional categories and dimensions of musical excerpts are not uniformly impaired after cochlear implantation. These results are discussed in relation to the relatively spared abilities of CI users in perceiving temporal (rhythm and metric as compared to spectral (pitch and timbre musical dimensions, which might benefit the processing of musical emotions (Cooper et al., 2008.

  9. Judgment of musical emotions after cochlear implantation in adults with progressive deafness.

    Science.gov (United States)

    Ambert-Dahan, Emmanuèle; Giraud, Anne-Lise; Sterkers, Olivier; Samson, Séverine

    2015-01-01

    While cochlear implantation is rather successful in restoring speech comprehension in quiet environments (Nimmons et al., 2008), other auditory tasks, such as music perception, can remain challenging for implant users. Here, we tested how patients who had received a cochlear implant (CI) after post-lingual progressive deafness perceive emotions in music. Thirteen adult CI recipients with good verbal comprehension (dissyllabic words ≥70%) and 13 normal hearing participants matched for age, gender, and education listened to 40 short musical excerpts that selectively expressed fear, happiness, sadness, and peacefulness ( Vieillard et al., 2008). The participants were asked to rate (on a 0-100 scale) how much the musical stimuli expressed these four cardinal emotions, and to judge their emotional valence (unpleasant-pleasant) and arousal (relaxing-stimulating). Although CI users performed above chance level, their emotional judgments (mean correctness scores) were generally impaired for happy, scary, and sad, but not for peaceful excerpts. CI users also demonstrated deficits in perceiving arousal of musical excerpts, whereas rating of valence remained unaffected. The current findings indicate that judgments of emotional categories and dimensions of musical excerpts are not uniformly impaired after cochlear implantation. These results are discussed in relation to the relatively spared abilities of CI users in perceiving temporal (rhythm and metric) as compared to spectral (pitch and timbre) musical dimensions, which might benefit the processing of musical emotions (Cooper et al., 2008).

  10. COCHLEAR IMPLANTATION: MY EXPERIENCE

    Directory of Open Access Journals (Sweden)

    Shankar

    2015-12-01

    Full Text Available Cochlear implant is a small, surgically implanted complex electronic device that can help to provide a sense of sound to a person with severe to profound sensorineural hearing loss. This type of hearing loss, typically involves damage to hair cells in the cochlea, as a result sound cannot reach the auditory nerve which usually receives information from hair cells. A cochlear implant skips the damaged hair cells and to stimulate the auditory nerve directly. An implant does not restore normal hearing, instead it can give a deaf person a useful representation of sounds in the environment and help him or her to understand speech. I am here presenting this article in relation to the indications, intraoperative and postoperative complications of cochlear implantation in our institute since January 2013. Children who receive implants at earlier age, outperform their peers who are implanted at a later age. This is reflected in all the areas of speech and language development.

  11. Speech-perception-in-noise and bilateral spatial abilities in adults with delayed sequential cochlear implantation

    Directory of Open Access Journals (Sweden)

    Ilze Oosthuizen

    2012-12-01

    Full Text Available Objective: To determine speech-perception-in-noise (with speech and noise spatially distinct and coincident and bilateral spatial benefits of head-shadow effect, summation, squelch and spatial release of masking in adults with delayed sequential cochlear implants. Study design: A cross-sectional one group post-test-only exploratory design was employed. Eleven adults (mean age 47 years; range 21 – 69 years of the Pretoria Cochlear Implant Programme (PCIP in South Africa with a bilateral severe-to-profound sensorineural hearing loss were recruited. Prerecorded Everyday Speech Sentences of The Central Institute for the Deaf (CID were used to evaluate participants’ speech-in-noise perception at sentence level. An adaptive procedure was used to determine the signal-to-noise ratio (SNR, in dB at which the participant’s speech reception threshold (SRT was achieved. Specific calculations were used to estimate bilateral spatial benefit effects. Results: A minimal bilateral benefit for speech-in-noise perception was observed with noise directed to the first implant (CI 1 (1.69 dB and in the speech and noise spatial listening condition (0.78 dB, but was not statistically significant. The head-shadow effect at 180° was the most robust bilateral spatial benefit. An improvement in speech perception in spatially distinct speech and noise indicates the contribution of the second implant (CI 2 is greater than that of the first implant (CI 1 for bilateral spatial benefit. Conclusion: Bilateral benefit for delayed sequentially implanted adults is less than previously reported for simultaneous and sequentially implanted adults. Delayed sequential implantation benefit seems to relate to the availability of the ear with the most favourable SNR.

  12. [Our experience with bilateral cochlear implantation].

    Science.gov (United States)

    Carmel, Eldar; Taitelbaum-Swead, Ricky; Migirov, Lela; Hildesheimer, Minka; Kronenberg, Jona

    2008-03-01

    Cochlear implantation is a standard method of hearing rehabilitation among patients with severe to profound bilateral sensorineural hearing loss. In recent years there have been an increasing number of studies showing superior hearing with bilateral cochlear implantation in comparison with a unilateral procedure. In this study we present our experience with 15 patients, children and adults, who had bilateral cochlear implant surgery. Speech perception test results demonstrated a hearing benefit in bilateral cochlear implantation in comparison with a unilateral device, mainly by improvement in the identification of speech in noise tests.

  13. Accessibility to cochlear implants in Belgium: state of the art on selection, reimbursement, habilitation, and outcomes in children and adults.

    Science.gov (United States)

    De Raeve, Leo; Wouters, Annelies

    2013-03-01

    Belgium, and especially the northern region called Flanders, has been a center of expertise in cochlear implants and early hearing screening for many years. Some of their surgeons and engineers were pioneers in the development of cochlear implants and in 1998 Flanders was the first region in Europe to implement a universal hearing screening program for all neonates. The Belgian National Institute for Health and Disability Insurance has reimbursed cochlear implants in children and adults since 1994 and bilateral implantation in children under the age of 12 years since February 2010. These deaf children, screened and implanted early, achieve higher auditory, speech and language outcomes and increasing numbers are going to regular schools using fewer interpreters. In 2010, 93% of severe-to-profound deaf preschool children in Flanders had received cochlear implants and 25% had bilateral implants. Although on average twice as many adults as children are implanted a year in Belgium, we have less research data available from this adult population. Also very little is published about the growth curves and minimal rehabilitation requirements (intensity, duration etc.) after implantation for both children and adults. So, there still remain many challenges for the future.

  14. Surgical complications following cochlear implantation in adults based on a proposed reporting consensus

    DEFF Research Database (Denmark)

    Jeppesen, Jonas; Faber, Christian Emil

    2013-01-01

    Abstract Conclusion: The rate of severe complications was low and cochlear implantation is a relatively safe procedure. Standardization is crucial when reporting on cochlear implant complications to ensure comparability between studies. A consensus on the reporting of complications proposed by a ...... occurred following one implantation (0.3%). Transient chorda tympani syndrome (30.8%), vertigo/dizziness (29.5%) and tinnitus (4.9%) were the most frequent minor complications....

  15. Long-term asymmetric hearing affects cochlear implantation outcomes differently in adults with pre- and postlingual hearing loss.

    Science.gov (United States)

    Boisvert, Isabelle; McMahon, Catherine M; Dowell, Richard C; Lyxell, Björn

    2015-01-01

    In many countries, a single cochlear implant is offered as a treatment for a bilateral hearing loss. In cases where there is asymmetry in the amount of sound deprivation between the ears, there is a dilemma in choosing which ear should be implanted. In many clinics, the choice of ear has been guided by an assumption that the reorganisation of the auditory pathways caused by longer duration of deafness in one ear is associated with poorer implantation outcomes for that ear. This assumption, however, is mainly derived from studies of early childhood deafness. This study compared outcomes following implantation of the better or poorer ear in cases of long-term hearing asymmetries. Audiological records of 146 adults with bilateral hearing loss using a single hearing aid were reviewed. The unaided ear had 15 to 72 years of unaided severe to profound hearing loss before unilateral cochlear implantation. 98 received the implant in their long-term sound-deprived ear. A multiple regression analysis was conducted to assess the relative contribution of potential predictors to speech recognition performance after implantation. Duration of bilateral significant hearing loss and the presence of a prelingual hearing loss explained the majority of variance in speech recognition performance following cochlear implantation. For participants with postlingual hearing loss, similar outcomes were obtained by implanting either ear. With prelingual hearing loss, poorer outcomes were obtained when implanting the long-term sound-deprived ear, but the duration of the sound deprivation in the implanted ear did not reliably predict outcomes. Contrary to an apparent clinical consensus, duration of sound deprivation in one ear has limited value in predicting speech recognition outcomes of cochlear implantation in that ear. Outcomes of cochlear implantation are more closely related to the period of time for which the brain is deprived of auditory stimulation from both ears.

  16. Living with cochlear implants: experiences of 17 adult patients in Sweden.

    Science.gov (United States)

    Hallberg, Lillemor R M; Ringdahl, Anders

    2004-02-01

    The aim of this grounded theory study was to gain a deeper understanding of what it means to profoundly deaf adults to undergo cochlear implantation and their experience of living with it daily. The aim of grounded theory is theorizing, i.e. constructing from data an explanatory scheme that systematically integrates various concepts and their relationships. The study group consisted of 10 women and seven men (age 29-78 years; mean age 56.5 years), who had had their cochlear implant (CI) for between 1 and 12 years (mean 4.1 years). Open taped interviews were carried out and analysed. The core category, coming back to life, defines a psychological process basic to existence, elucidating the existential value of hearing, including perceived harmony in life and becoming a part of the living world as important dimensions. This core concept is related to four additional emerging categories in a temporal order. Preventing disappointment concerns the decision to undergo the operation governed by the conception of having nothing to lose combined with low expectations of successful outcomes. Waiting in silence relates to experiences during the postoperative period such as sensations from the head and uncertainty about the outcome of surgery. The 'switch-on' was experienced as a significant revelation and the emotionally loaded starting point for their coming back to life. Retraining the brain concerns the lengthy audiovisual learning process. finally resulting in 'a car sounding like a car'. Strengthening of self-worth concerns psychosocial outcomes of cochlear implantation, in terms of less dependency and increased social participation. CIs provide a substantial improvement in the quality of life, as identified in the emerging generic process of coming back to life, fundamental for psychological existence.

  17. Cochlear implant in Hong Kong Cantonese.

    Science.gov (United States)

    Tang, S O; Luk, W S; Lau, C C; So, K W; Wong, C M; Yiu, M L; Kwok, C L

    1990-11-01

    Cochlear implant surgery was performed in four Cantonese-speaking postlingually deaf Chinese adults, using the House/3M single channel device. This article outlines the methodology, including preoperative assessment and postoperative rehabilitation; and explains the necessary modifications in speech and audiologic work-up in Cantonese-speaking patients. Salient features of Cantonese phonetics, especially its tonal characteristics, are described. The findings of the study are presented. The results of the cochlear implant would suggest a performance superior to that of the hearing aid. Furthermore, the cochlear implant is able to detect tonal cues. This quality of the cochlear implant may prove to be a valuable asset to a tonal language-speaking cochlear implantee.

  18. The Effects of Training on Recognition of Musical Instruments by Adults with Cochlear Implants.

    Science.gov (United States)

    Driscoll, Virginia D

    2012-11-01

    This study examines the efficiency and effectiveness of three types of training on recognition of musical instruments by adults with cochlear implants (CI). Seventy-one adults with CIs were randomly assigned to one of three training conditions: feedback on response accuracy, feedback-plus (response accuracy plus correct answer), and direct instruction. Each participant completed three training sessions per week over a five-week time period in which they listened to recorded excerpts of eight different musical instruments. Results showed significant pre-to-posttest improvement in music instrument recognition accuracy for all three training conditions (22.9-25.7%, p< 0.0001). Time when tested (week), bilateral CI use, and age were significant predictors of performance. Participants who wore bilateral implants scored significantly higher than participants with unilateral implants at all three time points; hearing aid use was not a significant predictor. These results may have practical implications for numerous types of auditory rehabilitation for persons who use CIs.

  19. Speechreading in Deaf Adults with Cochlear Implants: Evidence for Perceptual Compensation

    Science.gov (United States)

    Pimperton, Hannah; Ralph-Lewis, Amelia; MacSweeney, Mairéad

    2017-01-01

    Previous research has provided evidence for a speechreading advantage in congenitally deaf adults compared to hearing adults. A ‘perceptual compensation’ account of this finding proposes that prolonged early onset deafness leads to a greater reliance on visual, as opposed to auditory, information when perceiving speech which in turn results in superior visual speech perception skills in deaf adults. In the current study we tested whether previous demonstrations of a speechreading advantage for profoundly congenitally deaf adults with hearing aids, or no amplificiation, were also apparent in adults with the same deafness profile but who have experienced greater access to the auditory elements of speech via a cochlear implant (CI). We also tested the prediction that, in line with the perceptual compensation account, receiving a CI at a later age is associated with superior speechreading skills due to later implanted individuals having experienced greater dependence on visual speech information. We designed a speechreading task in which participants viewed silent videos of 123 single words spoken by a model and were required to indicate which word they thought had been said via a free text response. We compared congenitally deaf adults who had received CIs in childhood or adolescence (N = 15) with a comparison group of hearing adults (N = 15) matched on age and education level. The adults with CI showed significantly better scores on the speechreading task than the hearing comparison group. Furthermore, within the group of adults with CI, there was a significant positive correlation between age at implantation and speechreading performance; earlier implantation was associated with lower speechreading scores. These results are both consistent with the hypothesis of perceptual compensation in the domain of speech perception, indicating that more prolonged dependence on visual speech information in speech perception may lead to improvements in the perception of

  20. Efter cochlear implant

    DEFF Research Database (Denmark)

    Højen, Anders

    Dit barn har netop fået et cochlear implant. Hvad nu? Skal barnet fokusere udelukkende på at lære talt sprog, eller skal det også lære/fortsætte med tegnsprog eller støttetegn? Det er et vanskeligt spørgsmål, og før valget foretages, er det vigtigt at vurdere hvilke konsekvenser valget har, dels...... for den sproglige udvikling isoleret set, og dels for barnets udvikling ud fra en helhedsbetragtning. Dette indlæg fokuserer på, hvilke forventninger man kan have til cochlear implant-brugeres sproglige udvikling med talt sprog alene, hhv. med to sprog (tale og tegn). Disse forventninger er baseret på...

  1. Efter cochlear implant

    DEFF Research Database (Denmark)

    Højen, Anders

    2007-01-01

      Dit barn har netop fået et cochlear implant. Hvad nu? Skal barnet fokusere udelukkende på at lære talt sprog, eller skal det også lære/fortsætte med tegnsprog eller støttetegn? Det er et vanskeligt spørgsmål, og før valget foretages, er det vigtigt at vurdere hvilke konsekvenser valget har, dels...... for den sproglige udvikling isoleret set, og dels for barnets udvikling ud fra en helhedsbetragtning. Dette indlæg fokuserer på, hvilke forventninger man kan have til cochlear implant-brugeres sproglige udvikling med talt sprog alene, hhv. med to sprog (tale og tegn). Disse forventninger er baseret på...

  2. Cochlear implants in genetic deafness

    Institute of Scientific and Technical Information of China (English)

    Xuezhong Liu

    2014-01-01

    Genetic defects are one of the most important etiologies of severe to profound sensorineural hearing loss and play an important role in determining cochlear implantation outcomes. While the pathogenic mutation types of a number of deafness genes have been cloned, the pathogenesis mechanisms and their relationship to the outcomes of cochlear implantation remain a hot research area. The auditory performance is considered to be affected by the etiology of hearing loss and the number of surviving spiral ganglion cells, as well as others. Current research advances in cochlear implantation for hereditary deafness, especially the relationship among clinic-types, genotypes and outcomes of cochlear implantation, will be discussed in this review.

  3. Role of auditory feedback in speech produced by cochlear implanted adults and children

    Science.gov (United States)

    Bharadwaj, Sneha V.; Tobey, Emily A.; Assmann, Peter F.; Katz, William F.

    2002-05-01

    A prominent theory of speech production proposes that speech segments are largely controlled by reference to an internal model, with minimal reliance on auditory feedback. This theory also maintains that suprasegmental aspects of speech are directly regulated by auditory feedback. Accordingly, if a talker is briefly deprived of auditory feedback speech segments should not be affected, but suprasegmental properties should show significant change. To test this prediction, comparisons were made between speech samples obtained from cochlear implant users who repeated words under two conditions (1) implant device turned ON, and (2) implant switched OFF immediately before the repetition of each word. To determine whether producing unfamiliar speech requires greater reliance on auditory feedback than producing familiar speech, English and French words were elicited from English-speaking subjects. Subjects were congenitally deaf children (n=4) and adventitiously deafened adults (n=4). Vowel fundamental frequency and formant frequencies, vowel and syllable durations, and fricative spectral moments were analyzed. Preliminary data only partially confirm the predictions, in that both segmental and suprasegmental aspects of speech were significantly modified in the absence of auditory feedback. Modifications were greater for French compared to English words, suggesting greater reliance on auditory feedback for unfamiliar words. [Work supported by NIDCD.

  4. Cochlear Implantation in Children with Cochlear Malformation.

    Science.gov (United States)

    Saikawa, Etsuko; Takano, Kenichi; Ogasawara, Noriko; Tsubomatsu, Chieko; Takahashi, Nozomi; Shirasaki, Hideaki; Himi, Tetsuo

    2016-01-01

    Cochlear implantation (CI) has proven to be an effective treatment for severe bilateral sensorineural hearing loss (SNHL). Inner ear malformation is a rare anomaly and occurs in approximately 20% of cases with congenital SNHL. In cases with cochlear malformation, CI can be successfully performed in nearly all patients, the exceptions being those with complete labyrinthine and cochlear aplasia. It is important to evaluate the severity of inner ear deformity and other associated anomalies during the preimplantation radiological assessment in order to identify any complication that may potentially occur during the surgery and subsequent patient management.

  5. Residual neural processing of musical sound features in adult cochlear implant users

    Directory of Open Access Journals (Sweden)

    Lydia eTimm

    2014-04-01

    Full Text Available AbstractAuditory processing in general and music perception in particular are hampered in adult Cochlear Implant (CI users. To examine the residual music perception skills and their underlying neural correlates in CI users implanted in adolescence or adulthood, we conducted an electrophysiological and behavioural study comparing adult CI users with normal-hearing age-matched controls (NH controls. We used a newly developed musical multi-feature paradigm, which makes it possible to test automatic auditory discrimination of six different types of sound feature changes inserted within a musical enriched setting lasting only 20 minutes. The presentation of stimuli did not require the participants’ attention, allowing the study of the early automatic stage of feature processing in the auditory cortex. For the CI users, we obtained mismatch negativity (MMN brain responses to five feature changes but not to changes of rhythm, whereas we obtained MMNs for all the feature changes in the NH controls. Furthermore, the MMNs to Deviants of pitch of CI users were reduced in amplitude and later than those of NH controls for changes of pitch and guitar timbre. No other group differences in MMN parameters were found to changes in intensity and saxophone timbre. Furthermore, the MMNs in CI users reflected the behavioral scores from a respective discrimination task and were correlated with patients’ age and speech intelligibility. Our results suggest that even though CI users are not performing at the same level as NH controls in neural discrimination of pitch-based features, they do possess potential neural abilities for music processing. However, CI users showed a disrupted ability to automatically discriminate rhythmic changes compared with controls. The current behavioural and MMN findings highlight the residual neural skills for music processing even in CI users who have been implanted in adolescence or adulthood.

  6. Cochlear implantation in congenital cochlear abnormalities.

    Science.gov (United States)

    Ahmad, R L; Lokman, S

    2005-08-01

    Many children have benefited from cochlear implant device including those with congenital malformation of the inner ear. The results reported in children with malformed cochlea are very encouraging. We describe 2 cases of Mondini's malformation with severe sensorineural hearing loss. Cochlear implantation was performed and both of them underwent post-implantation speech rehabilitation. Post-implantation, both of them were noted to respond to external sound. But the second case developed facial twitching a few months after the device was switched on. It is important to evaluate the severity of the inner ear deformity and the other associated anomalies in pre-implantation radiological assessment in order to identify the problem that may complicate the surgery and subsequent patient management.

  7. Neurocognitive testing and cochlear implantation: insights into performance in older adults

    Directory of Open Access Journals (Sweden)

    Cosetti MK

    2016-05-01

    Full Text Available Maura K Cosetti,1,2 James B Pinkston,3 Jose M Flores,4 David R Friedmann,5 Callie B Jones,3 J Thomas Roland Jr,5,6 Susan B Waltzman5 1Department of Otolaryngology – Head and Neck Surgery, 2Department of Neurosurgery, 3Department of Neurology, Louisiana State University Health Sciences Center, Shreveport, LA, 4Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MA, 5Department of Otolaryngology, 6Department of Neurosurgery, New York University School of Medicine, New York, NY, USA Objective: The aim of this case series was to assess the impact of auditory rehabilitation with cochlear implantation on the cognitive function of elderly patients over time. Design: This is a longitudinal case series of prospective data assessing neurocognitive function and speech perception in an elderly cohort pre- and post-implantation. Setting: University cochlear implant center. Participants: The patients were post-lingually deafened elderly female (mean, 73.6 years; SD, 5.82; range, 67–81 years cochlear implant recipients (n=7. Measurements: A neurocognitive battery of 20 tests assessing intellectual function, learning, short- and long-term memory, verbal fluency, attention, mental flexibility, and processing speed was performed prior to and 2–4.1 years (mean, 3.7 after cochlear implant (CI. Speech perception testing using Consonant–Nucleus–Consonant words was performed prior to implantation and at regular intervals postoperatively. Individual and aggregate differences in cognitive function pre- and post-CI were estimated. Logistic regression with cluster adjustment was used to estimate the association (%improvement or %decline between speech understanding and years from implantation at 1 year, 2 years, and 3 years post-CI. Results: Improvements after CI were observed in 14 (70% of all subtests administered. Declines occurred in five (25% subtests. In 55 individual tests (43%, post-CI performance improved

  8. Music and Quality of Life in Early-Deafened Late-Implanted Adult Cochlear Implant Users

    NARCIS (Netherlands)

    Fuller, Christina; Mallinckrodt, Lisa; Maat, Bert; Başkent, Deniz; Free, Rolien

    2013-01-01

    Hypothesis and Background: The early-deafened, late-implanted (EDLI) CI users constitute a relatively new and understudied clinical population. To contribute to a better understanding of the implantation outcome, this study evaluated this population for self-reported enjoyment and perception of musi

  9. Cochlear implants: our experience and literature review

    Directory of Open Access Journals (Sweden)

    Martins, Mariane Barreto Brandão

    2012-01-01

    Full Text Available Introduction: Cochlear Implants are important for individuals with severe to profound bilateral sensorineural hearing loss. Objective: Evaluate the experience of cochlear implant center of Otorhinolaryngology through the analysis of records of 9 patients who underwent cochlear implant surgery. Methods: This is a retrospective study performed with the patients records. Number 0191.0.107.000-11 ethics committee approval. We evaluated gender, etiology, age at surgery, duration of deafness, classification of deafness, unilateral or bilateral surgery, intraoperative and postoperative neural response and impedance of the electrodes in intraoperative and preoperative tests and found those that counter-indicated surgery. Results: There were 6 pediatric and 3 adult patients. Four male and 5 female. Etiologies: maternal rubella, cytomegalovirus, ototoxicity, meningitis, and sudden deafness. The age at surgery and duration of deafness ranged from 2 - 46 years and 2 - 18 years, respectively. Seven patients were pre-lingual. All had profound bilateral PA. There were 7 bilateral implants. Intraoperative complications: hemorrhage. Complications after surgery: vertigo and internal device failure. In 7 patients the electrodes were implanted through. Telemetry showed satisfactory neural response and impedance. CT and MRI was performed in all patients. We found enlargement of the vestibular aqueduct in a patient and incudomalleolar malformation. Conclusion: The cochlear implant as a form of auditory rehabilitation is well established and spreading to different centers specialized in otoaudiology. Thus, the need for structured services and trained professionals in this type of procedure is clear.

  10. Cochlear implants: our experience and literature review

    Science.gov (United States)

    Martins, Mariane Barreto Brandão; de Lima, Francis Vinicius Fontes; Santos, Ronaldo Carvalho; Santos, Arlete Cristina Granizo; Barreto, Valéria Maria Prado; de Jesus, Eduardo Passos Fiel

    2012-01-01

    Summary Introduction: Cochlear Implants are important for individuals with severe to profound bilateral sensorineural hearing loss. Objective: Evaluate the experience of cochlear implant center of Otorhinolaryngology through the analysis of records of 9 patients who underwent cochlear implant surgery. Methods: This is a retrospective study performed with the patients records. Number 0191.0.107.000-11 ethics committee approval. We evaluated gender, etiology, age at surgery, duration of deafness, classification of deafness, unilateral or bilateral surgery, intraoperative and postoperative neural response and impedance of the electrodes in intraoperative and preoperative tests and found those that counter-indicated surgery. Results: There were 6 pediatric and 3 adult patients. Four male and 5 female. Etiologies: maternal rubella, cytomegalovirus, ototoxicity, meningitis, and sudden deafness. The age at surgery and duration of deafness ranged from 2–46 years and 2–18 years, respectively. Seven patients were pre-lingual. All had profound bilateral PA. There were 7 bilateral implants. Intraoperative complications: hemorrhage. Complications after surgery: vertigo and internal device failure. In 7 patients the electrodes were implanted through. Telemetry showed satisfactory neural response and impedance. CT and MRI was performed in all patients. We found enlargement of the vestibular aqueduct in a patient and incudomalleolar malformation. Conclusion: The cochlear implant as a form of auditory rehabilitation is well established and spreading to different centers specialized in otoaudiology. Thus, the need for structured services and trained professionals in this type of procedure is clear. PMID:25991976

  11. Cochlear implantation: a biomechanical prosthesis for hearing loss.

    Science.gov (United States)

    Yawn, Robert; Hunter, Jacob B; Sweeney, Alex D; Bennett, Marc L

    2015-01-01

    Cochlear implants are a medical prosthesis used to treat sensorineural deafness, and one of the greatest advances in modern medicine. The following article is an overview of cochlear implant technology. The history of cochlear implantation and the development of modern implant technology will be discussed, as well as current surgical techniques. Research regarding expansion of candidacy, hearing preservation cochlear implantation, and implantation for unilateral deafness are described. Lastly, innovative technology is discussed, including the hybrid cochlear implant and the totally implantable cochlear implant.

  12. Congenitally Deafblind Children and Cochlear Implants

    DEFF Research Database (Denmark)

    Dammeyer, Jesper Herup

    2008-01-01

    There has been much research conducted demonstrating the positive benefits of cochlear implantation (CI) in children who are deaf. Research on cochlear implantation in children who are both deaf and blind, however, is lacking. The purpose of this article is to present a study of 5 congenitally...... deafblind children who received cochlear implants between 2.2 and 4.2 years of age.  Ratings of video observations were used to measure the children's early communication development with and without the use of their cochlear implants. In addition, parental interviews were used to assess the benefits...... parents perceived regarding their children's cochlear implants. Two examples are included in this article to illustrate the parents' perspectives about cochlear implantation in their deafblind children. Benefits of cochlear implantation in this cohort of children included improved attention and emotional...

  13. Cochlear implant outcomes in patients with superior canal dehiscence

    NARCIS (Netherlands)

    Puram, Sidharth V.; Roberts, Daniel S.; Niesten, Marlien E F; Dilger, Amanda E.; Lee, Daniel J.

    2015-01-01

    Objective: To determine whether adult cochlear implant (CI) users with superior canal dehiscence syndrome (SCDS) or asymptomatic superior semicircular canal dehiscence (SCD) have different surgical, vestibular, and audiologic outcomes when compared to CI users with normal temporal bone anatomy. Meth

  14. Reading skills after cochlear implantation

    NARCIS (Netherlands)

    Vermeulen, Agnes Maria

    2007-01-01

    It has frequently been found that profoundly deaf children with conventional hearing aids have difficulties with the comprehension of written text. Cochlear Implants (CIs) were expected to enhance the reading comprehension of these profoundly deaf children because they provide auditory access to spo

  15. Cortical plasticity after cochlear implantation

    DEFF Research Database (Denmark)

    Petersen, B; Gjedde, A; Wallentin, M;

    2013-01-01

    The most dramatic progress in the restoration of hearing takes place in the first months after cochlear implantation. To map the brain activity underlying this process, we used positron emission tomography at three time points: within 14 days, three months, and six months after switch-on. Fifteen...

  16. Surgical Complications of Cochlear Implantation

    Directory of Open Access Journals (Sweden)

    Basir Hashemi

    2010-03-01

    Full Text Available Cochlear implantation is a method used for the treatment ofpatients with profound hearing loss. This procedure may theaccompanied by some major or minor complications. Weevaluated the surgical complications of cochlear implantationin Fars province (south of Iran. A total of 150 patients withcochlear implantation were enrolled in the present study. Mostof the patients were pre-lingual children and most of our deviceswere nucleus prosthesis. We had three device failuresand four major complications, including one misplaced electrode,one case of meningitis, one case of foreign body reactionto suture and one case with extensive hematoma. Thesecomplications were managed successfully by surgical interventionor re-implantation. Facial nerve damage or woundbreakdown was not seen. Minor complications including smallhematoma, edema, stitch infection and dizziness were found in15 cases, which were managed medically. In our center, therate of minor complications was comparable to other centersin the world. But the rate of major surgical complications waslower than other centers.

  17. Surface biotechnology for refining cochlear implants.

    Science.gov (United States)

    Tan, Fei; Walshe, Peter; Viani, Laura; Al-Rubeai, Mohamed

    2013-12-01

    The advent of the cochlear implant is phenomenal because it is the first surgical prosthesis that is capable of restoring one of the senses. The subsequent rapid evolution of cochlear implants through increasing complexity and functionality has been synchronized with the recent advancements in biotechnology. Surface biotechnology has refined cochlear implants by directly influencing the implant–tissue interface. Emerging surface biotechnology strategies are exemplified by nanofibrous polymeric materials, topographical surface modification, conducting polymer coatings, and neurotrophin-eluting implants. Although these novel developments have received individual attention in the recent literature, the time has come to investigate their collective applications to cochlear implants to restore lost hearing.

  18. Cochlear implantation in superficial siderosis.

    Science.gov (United States)

    Kim, Chong-Sun; Song, Jae-Jun; Park, Min-Hyun; Kim, Young Ho; Koo, Ja-Won

    2006-08-01

    Superficial siderosis (SS) of the central nervous system has been thought to be a rare condition that generates progressive hearing loss, ataxia, pyramidal signs, and dementia. The main cause of hearing loss by SS is thought to be neuronal. Because there is no histopathologic report of the human temporal bone in SS, there is a debate about the possibility of cochlear involvement. We present a 25-year-old man who was investigated for bilateral progressive sensorineural hearing loss and vestibular failure after head trauma. On brain MRI, SS of the central nervous system was detected. Distortion product otoacoustic emission (DPOAE) and auditory brainstem response (ABR) showed no response on both sides. However, integrity of the eighth nerve was proved by the electrical ABR test on the right side and the patient benefited significantly from cochlear implantation. The sensorineural hearing loss in SS seems to be related to cochlear damage as well as neuronal damage. So, cochlear implantation would be a hearing rehabilitation modality for the sensorineural hearing loss caused by SS.

  19. Imaging in cochlear implant patients [

    OpenAIRE

    Aschendorff, Antje

    2012-01-01

    [english] Imaging procedures are a mainstream tool in the daily ENT workflow. Cochlear Implant patients are representing a special population with specific demands for imaging. There are different imaging techniques available for pre-operative evaluation, surgery and postoperative controls with different indications and consequences. High-resolution computed tomography and magnetic resonance imaging are mainly used in the evaluation process. New procedures, as digital volume tomography, are i...

  20. Cochlear implant in incomplete partition type I.

    Science.gov (United States)

    Berrettini, S; Forli, F; De Vito, A; Bruschini, L; Quaranta, N

    2013-02-01

    In this investigation, we report on 4 patients affected by incomplete partition type I submitted to cochlear implant at our institutions. Preoperative, surgical, mapping and follow-up issues as well as results in cases with this complex malformation are described. The cases reported in the present study confirm that cochlear implantation in patients with incomplete partition type I may be challenging for cochlear implant teams. The results are variable, but in many cases satisfactory, and are mainly related to the surgical placement of the electrode and residual neural nerve fibres. Moreover, in some cases the association of cochlear nerve abnormalities and other disabilities may significantly affect results.

  1. Importance of cochlear health for implant function.

    Science.gov (United States)

    Pfingst, Bryan E; Zhou, Ning; Colesa, Deborah J; Watts, Melissa M; Strahl, Stefan B; Garadat, Soha N; Schvartz-Leyzac, Kara C; Budenz, Cameron L; Raphael, Yehoash; Zwolan, Teresa A

    2015-04-01

    Amazing progress has been made in providing useful hearing to hearing-impaired individuals using cochlear implants, but challenges remain. One such challenge is understanding the effects of partial degeneration of the auditory nerve, the target of cochlear implant stimulation. Here we review studies from our human and animal laboratories aimed at characterizing the health of the implanted cochlea and the auditory nerve. We use the data on cochlear and neural health to guide rehabilitation strategies. The data also motivate the development of tissue-engineering procedures to preserve or build a healthy cochlea and improve performance obtained by cochlear implant recipients or eventually replace the need for a cochlear implant. This article is part of a Special Issue entitled .

  2. Connected speech intelligibility of children with cochlear implants and children with normal hearing.

    Science.gov (United States)

    Chin, Steven B; Tsai, Patrick L; Gao, Sujuan

    2003-11-01

    The objective of this study was to compare the connected speech intelligibility of children who use cochlear implants with that of children who have normal hearing. Previous research has shown that speech intelligibility improves from before cochlear implantation to after implantation and that the speech intelligibility of children who use cochlear implants compares favorably with that of children who use conventional hearing aids. However, no research has yet addressed the question of how the speech intelligibility of children who use cochlear implants compares to that of children with normal hearing. In the current study, archival data on connected speech intelligibility from 51 children with cochlear implants were compared with newly collected data from 47 children with normal hearing. Results showed that for children with cochlear implants, greater intelligibility was associated with both increased chronological age and increased duration of cochlear implant use. Consistent with previous studies, children with normal hearing achieved adult-like or near-adult-like intelligibility around the age of 4 years, but a similar peak in intelligibility was not observed for the children who used cochlear implants. On the whole, children with cochlear implants were significantly less intelligible than children with normal hearing, when controlling both for chronological age and for length of auditory experience. These results have implications for the socialization and education of children with cochlear implants, particularly with respect to on-time placement in mainstream educational environments with age peers.

  3. Effects of Within-Talker Variability on Speech Intelligibility in Mandarin-Speaking Adult and Pediatric Cochlear Implant Patients.

    Science.gov (United States)

    Su, Qiaotong; Galvin, John J; Zhang, Guoping; Li, Yongxin; Fu, Qian-Jie

    2016-06-30

    Cochlear implant (CI) speech performance is typically evaluated using well-enunciated speech produced at a normal rate by a single talker. CI users often have greater difficulty with variations in speech production encountered in everyday listening. Within a single talker, speaking rate, amplitude, duration, and voice pitch information may be quite variable, depending on the production context. The coarse spectral resolution afforded by the CI limits perception of voice pitch, which is an important cue for speech prosody and for tonal languages such as Mandarin Chinese. In this study, sentence recognition from the Mandarin speech perception database was measured in adult and pediatric Mandarin-speaking CI listeners for a variety of speaking styles: voiced speech produced at slow, normal, and fast speaking rates; whispered speech; voiced emotional speech; and voiced shouted speech. Recognition of Mandarin Hearing in Noise Test sentences was also measured. Results showed that performance was significantly poorer with whispered speech relative to the other speaking styles and that performance was significantly better with slow speech than with fast or emotional speech. Results also showed that adult and pediatric performance was significantly poorer with Mandarin Hearing in Noise Test than with Mandarin speech perception sentences at the normal rate. The results suggest that adult and pediatric Mandarin-speaking CI patients are highly susceptible to whispered speech, due to the lack of lexically important voice pitch cues and perhaps other qualities associated with whispered speech. The results also suggest that test materials may contribute to differences in performance observed between adult and pediatric CI users.

  4. Cochlear Implant Using Neural Prosthetics

    Science.gov (United States)

    Gupta, Shweta; Singh, Shashi kumar; Dubey, Pratik Kumar

    2012-10-01

    This research is based on neural prosthetic device. The oldest and most widely used of these electrical, and often computerized, devices is the cochlear implant, which has provided hearing to thousands of congenitally deaf people in this country. Recently, the use of the cochlear implant is expanding to the elderly, who frequently suffer major hearing loss. More cutting edge are artificial retinas, which are helping dozens of blind people see, and ìsmartî artificial arms and legs that amputees can maneuver by thoughts alone, and that feel more like real limbs.Research, which curiosity led to explore frog legs dancing during thunderstorms, a snail shapedorgan in the inner ear, and how various eye cells react to light, have fostered an understanding of how to ìtalkî to the nervous system. That understanding combined with the miniaturization of electronics and enhanced computer processing has enabled prosthetic devices that often can bridge the gap in nerve signaling that is caused by disease or injury.

  5. Audiovisual segregation in cochlear implant users.

    Directory of Open Access Journals (Sweden)

    Simon Landry

    Full Text Available It has traditionally been assumed that cochlear implant users de facto perform atypically in audiovisual tasks. However, a recent study that combined an auditory task with visual distractors suggests that only those cochlear implant users that are not proficient at recognizing speech sounds might show abnormal audiovisual interactions. The present study aims at reinforcing this notion by investigating the audiovisual segregation abilities of cochlear implant users in a visual task with auditory distractors. Speechreading was assessed in two groups of cochlear implant users (proficient and non-proficient at sound recognition, as well as in normal controls. A visual speech recognition task (i.e. speechreading was administered either in silence or in combination with three types of auditory distractors: i noise ii reverse speech sound and iii non-altered speech sound. Cochlear implant users proficient at speech recognition performed like normal controls in all conditions, whereas non-proficient users showed significantly different audiovisual segregation patterns in both speech conditions. These results confirm that normal-like audiovisual segregation is possible in highly skilled cochlear implant users and, consequently, that proficient and non-proficient CI users cannot be lumped into a single group. This important feature must be taken into account in further studies of audiovisual interactions in cochlear implant users.

  6. Costs involved in using a cochlear implant in South Africa

    Directory of Open Access Journals (Sweden)

    Gillian Robyn Kerr

    2012-12-01

    Full Text Available Cochlear implantation is an expensive but effective lifelong intervention for individuals with a severe-to-profound hearing loss. The primary aim of this study was to survey the short- and long-term costs of cochlear implantation. Individuals (N=154 using cochlear implants obtained from the University of Stellenbosch-Tygerberg Hospital Cochlear Implant Unit in Cape Town, South Africa were surveyed using a questionnaire and patient record review. The questionnaire used a combination of closed and open-ended questions to gather both quantitative and qualitative information. Costs were categorised as short- and long-term costs. All costs were converted to constant rands (June 2010 using the Consumer Price Index to allow for comparison in real terms over time. In the first 10 years of implantation the average estimated costs incurred by adults totalled R379 626, and by children R455 225. The initial purchase of the implant system was the most substantial cost, followed by upgrading of the processor. Travel and accommodation costs peaked in the first 2 years. On average the participants spent R2 550 per year on batteries and spares. Rehabilitation for children cost an average of R7 200. Insurance costs averaged R4 040 per year, and processor repairs R3 000 each. In addition to the upfront expense of obtaining the cochlear implant system, individuals using a cochlear implant in South Africa should be prepared for the long-term costs of maintenance, accessing the unit, support services and additional costs associated with use. Knowledge of these costs is important to ensure that individuals are successful users of their cochlear implants in the long term.

  7. Application of modified auditory profile in observation of hearing rehabilitation effects among adult partially deaf patients with cochlear implant system

    Directory of Open Access Journals (Sweden)

    Pankovska A.

    2013-12-01

    Full Text Available Aim: to obtain results in order to organize an individual profile of patient's hearing skills, which is a graphic illustration of obtained results that are used to monitor and provide appropriate assessment of the rehabilitation process using the modified set of hearing abilities tests. Material and methods. Material includes 24 adult patients (19 female and 5 male with partial deafness. All of them use cochlear implants. 6 patients have been using the Cl for no more than 6 months. 12 subjects have been using the Cl for more than 6 months, 3 of them have been using the Cl for more than a year and 3 people have been using the Cl for more than 24 months. Results. Research was based on 18 tasks. In the 8 of them 24 patients obtained the result of 100% identification just one month after the first speech processor fitting. However significant changes were observed in the remaining 10 tasks. 3 complete profiles of the patients hearing skills were created. Conclusions. Results obtained by the patients confirm that the set of supervision materials designed to control the effects of rehabilitation and proposed as pilot study is valuable and can be used in diagnostics. Formula developed on the basis of auditory skill profile of the patient provides clear information on patient's progress (both to a patient and a therapist. It helps determine exercises for the next stages of rehabilitation.

  8. Spatial channel interactions in cochlear implants

    Science.gov (United States)

    Tang, Qing; Benítez, Raul; Zeng, Fan-Gang

    2011-08-01

    The modern multi-channel cochlear implant is widely considered to be the most successful neural prosthesis owing to its ability to restore partial hearing to post-lingually deafened adults and to allow essentially normal language development in pre-lingually deafened children. However, the implant performance varies greatly in individuals and is still limited in background noise, tonal language understanding, and music perception. One main cause for the individual variability and the limited performance in cochlear implants is spatial channel interaction from the stimulating electrodes to the auditory nerve and brain. Here we systematically examined spatial channel interactions at the physical, physiological, and perceptual levels in the same five modern cochlear implant subjects. The physical interaction was examined using an electric field imaging technique, which measured the voltage distribution as a function of the electrode position in the cochlea in response to the stimulation of a single electrode. The physiological interaction was examined by recording electrically evoked compound action potentials as a function of the electrode position in response to the stimulation of the same single electrode position. The perceptual interactions were characterized by changes in detection threshold as well as loudness summation in response to in-phase or out-of-phase dual-electrode stimulation. To minimize potentially confounding effects of temporal factors on spatial channel interactions, stimulus rates were limited to 100 Hz or less in all measurements. Several quantitative channel interaction indexes were developed to define and compare the width, slope and symmetry of the spatial excitation patterns derived from these physical, physiological and perceptual measures. The electric field imaging data revealed a broad but uniformly asymmetrical intracochlear electric field pattern, with the apical side producing a wider half-width and shallower slope than the basal

  9. Cochlear implant in an ambulatory surgery center.

    Science.gov (United States)

    Joseph, Aimee M; Lassen, L Frederick

    2013-02-01

    Presbycusis, or sensorineural hearing loss in the elderly population, affects approximately 40% to 50% of people over the age of 75. A variety of devices are available to those with hearing loss. Cochlear implants, for example, are especially useful for those with severe-to-profound hearing loss. The population is aging, so the demand for cochlear implantation in ambulatory surgery centers will likely increase. Ambulatory surgery centers (ASC) can provide a more convenient and less expensive location for cochlear implant surgery than hospital-based operating facilities. Patient selection using standard ASC criteria, coupled with an understanding of the unique surgical and anesthetic needs of cochlear implant patients, are key to bringing this once exotic inpatient procedure into the ASC.

  10. Aspects of Music with Cochlear Implants – Music Listening Habits and Appreciation in Danish Cochlear Implant Users

    DEFF Research Database (Denmark)

    Petersen, Bjørn; Hansen, Mads; Sørensen, Stine Derdau

    Cochlear implant users differ significantly from their normal hearing peers when it comes to perception of music. Several studies have shown that structural features – such as rhythm, timbre, and pitch – are transmitted less accurately through an implant. However, we cannot predict personal...... enjoyment of music solely as a function of accuracy of perception. But can music be pleasant with a cochlear implant at all? Our aim here was to gather information of both music enjoyment and listening habits before the onset of hearing loss and post-operation from a large, representative sample of Danish...... recipients. A hundred and sixty three adult cochlear implant users (101 females, 62 males) completed a survey containing questions about musical background, listening habits, and music enjoyment. The results indicate a wide range of success with music, but in general, the results show that the CI users enjoy...

  11. Social inclusion of children with cochlear implants

    OpenAIRE

    Tomič, Katarina

    2016-01-01

    In the last few decades the progress of science has enabled the development of cochlear implant, which is suitable for persons who have defected inner ear, so hearing amplification is no longer enough for them. It allows them to perceive sound and develop verbal language, which provide better quality of life. Because of that, around the world and also in Slovenia, more and more children with cochlear implants are being placed in mainstream school settings. Recently, researchers are paying mor...

  12. Congenital and prolonged adult-onset deafness cause distinct degradations in neural ITD coding with bilateral cochlear implants.

    Science.gov (United States)

    Hancock, Kenneth E; Chung, Yoojin; Delgutte, Bertrand

    2013-06-01

    Bilateral cochlear implant (CI) users perform poorly on tasks involving interaural time differences (ITD), which are critical for sound localization and speech reception in noise by normal-hearing listeners. ITD perception with bilateral CI is influenced by age at onset of deafness and duration of deafness. We previously showed that ITD coding in the auditory midbrain is degraded in congenitally deaf white cats (DWC) compared to acutely deafened cats (ADC) with normal auditory development (Hancock et al., J. Neurosci, 30:14068). To determine the relative importance of early onset of deafness and prolonged duration of deafness for abnormal ITD coding in DWC, we recorded from single units in the inferior colliculus of cats deafened as adults 6 months prior to experimentation (long-term deafened cats, LTDC) and compared neural ITD coding between the three deafness models. The incidence of ITD-sensitive neurons was similar in both groups with normal auditory development (LTDC and ADC), but significantly diminished in DWC. In contrast, both groups that experienced prolonged deafness (LTDC and DWC) had broad distributions of best ITDs around the midline, unlike the more focused distributions biased toward contralateral-leading ITDs present in both ADC and normal-hearing animals. The lack of contralateral bias in LTDC and DWC results in reduced sensitivity to changes in ITD within the natural range. The finding that early onset of deafness more severely degrades neural ITD coding than prolonged duration of deafness argues for the importance of fitting deaf children with sound processors that provide reliable ITD cues at an early age.

  13. Cochlear implantation in children with complex needs: The perceptions of professionals at cochlear implant centres

    NARCIS (Netherlands)

    Archbold, S.M.; Athalye, S.; Mulla, I.; Harrigan, S.; Wolters, N.; Isarin, J.; Knoors, H.E.T.

    2016-01-01

    Objective To explore the views of cochlear implant centre teams about the process of referral, assessment and rehabilitation for children with complex needs. Methods An on-line survey of cochlear implant centres in the UK and in the Netherlands was carried out, with both quantitative and qualitative

  14. Effects of Delayed Second Cochlear Implant

    Institute of Scientific and Technical Information of China (English)

    XIA Rui-ming; WU Xi-hong; JANG Zi-gang; JING Yuan-yuan; LIN Yun-juan; YU Li-sheng

    2006-01-01

    Objective Since Helms' successful bilateral cochlear implantation with good results in 1996, there have been increasing number of reports on bilateral cochlear implantation. Most second device have been implantated within one year after the first. Considering effects of long time auditory deprivation, it is not clear whether a delayed second cochlear implant serves to add additional benefits and how it may interact with central nervous system plasticity. Methods Three cases who received delayed second cochlear implants at People's Hospital of Peking University from 2002 to 2005 were reviewed. The interval between the first and second implants was longer than 2 years in all three patients. Sound perception, and unilateral/bilateral speech discrimination in quiet and noise were evaluated. In addition, GAP detection test was conducted in one patient. Results In one case,having both implants on provided improved performance compared to using only one implant both in quiet and noise. Presumably due to visual interference from lip-reading or short interval between second implant and testing,one patient showed no improvement from using the second implant either in quiet or noise, while the last case demonstrated additional benefits from the second implant only in quiet. In all three patients, performance in recognizing the four tones in Mandarin was superior over word recognition. Conclusions Considerable plasticity in the cerebral auditory center is preserved, despite long acoustic deprivation in some children who have received unilateral cochlear implant. Delayed second implants can result in significant improvements in some of these children. Visual interference from lip-reading may be an obstacle during retraining. The better recognition of tones in the Mandarin language may represent a different sound discrimination mechanism in the auditory system,although it may also be related to the signal processing mechanisms of the implant used (MED-EL COMBI 40+).

  15. Outcome of cochlear implantation in children with cochlear malformations.

    Science.gov (United States)

    Bille, Jesper; Fink-Jensen, Vibeke; Ovesen, Therese

    2015-03-01

    The objective of the study was the evaluation of outcomes of cochlear implantation (CI) in children with cochlear malformations. A retrospective case-control study was conducted in a tertiary referral centre. The patients were children with inner ear malformation judged by high-resolution computed tomography and magnetic resonance imaging treated with uni- or bilateral CI and a follow-up period of at least 3 years. They were matched with a control group of children operated for other reasons. The patients were operated by one of two surgeons using similar techniques including a standard perimodiolar electrode in all cases. The intervention was therapeutic and rehabilitative. The main outcome measures were category of auditory performance (CAP) and speech intelligibility rating (SIR). Eighteen children were diagnosed with cochlear malformations (12 % of children receiving CI). No statistical differences regarding CAP and SIR scores were found between the two groups. Only one child was diagnosed with a common cavity and performed below average. Children with auditory neuropathy performed beyond average. Children with cochlear malformations performed equally to children without malformation in the long term. Standard perimodiolar electrodes can be used despite cochlear malformations. The most important factors determining the outcome is the age of the child at the time of implantation and duration of hearing loss before CI. Awareness towards an increased risk of complications in case of inner ear malformations is recommended.

  16. [Cochlear implantation through the middle fossa approach].

    Science.gov (United States)

    Szyfter, W; Colletti, V; Pruszewicz, A; Kopeć, T; Szymiec, E; Kawczyński, M; Karlik, M

    2001-01-01

    The inner part of cochlear implant is inserted into inner ear during surgery through mastoid and middle ear. It is a classical method, used in the majority cochlear centers in the world. This is not a suitable method in case of chronic otitis media and middle ear malformation. In these cases Colletti proposed the middle fossa approach and cochlear implant insertion omitting middle ear structures. In patient with bilateral chronic otitis media underwent a few ears operations without obtaining dry postoperative cavity. Cochlear implantation through the middle fossa approach was performed in this patient. The bone fenster was cut, temporal lobe was bent and petrosus pyramid upper surface was exposed. When the superficial petrosal greater nerve, facial nerve and arcuate eminence were localised, the cochlear was open in the basal turn and electrode were inserted. The patient achieves good results in the postoperative speech rehabilitation. It confirmed Colletti tesis that deeper electrode insertion in the cochlear implantation through the middle fossa approach enable use of low and middle frequencies, which are very important in speech understanding.

  17. Effect of pediatric bilateral cochlear implantation on language development

    NARCIS (Netherlands)

    Boons, Tinne; Brokx, Jan; Frijns, Johan; Peeraer, Louis; Philips, Birgit; Vermeulen,; Wouters,; Wieringen, van

    2012-01-01

    Objective: To examine spoken language outcomes in children undergoing bilateral cochlear implantation compared with matched peers undergoing unilateral implantation. Design: Case-control, frequency-matched, retrospective cross-sectional multicenter study. Setting: Two Belgian and 3 Dutch cochlear im

  18. Cochlear Implants Keep Twin Sisters Learning, Discovering Together

    Science.gov (United States)

    ... Past Issues Special Section: Focus on Communication Cochlear Implants Past Issues / Fall 2008 Table of Contents For ... right, and Isabelle Jeppsen meet with Mia's cochlear implant surgeon, John Niparko, M.D., of Johns Hopkins ...

  19. Risk of Bacterial Meningitis in Children with Cochlear Implants

    Science.gov (United States)

    ... Information For... Media Policy Makers Risk of Bacterial Meningitis in Children with Cochlear Implants Language: English Español ( ... Compartir 2002 Study of the Risk of Bacterial Meningitis in Children with Cochlear Implants Many people have ...

  20. Peer Relationships of Children with Cochlear Implants.

    Science.gov (United States)

    Bat-Chava, Yael; Deignan, Elizabeth

    2001-01-01

    Qualitative and quantitative analysis of interviews with parents of children with cochlear implants found that, although implants have the potential to improve deaf children's relationships with hearing peers, these children still face communication obstacles which impede their social relationships. Results are discussed from the viewpoints of…

  1. Cochlear implant: what the radiologist should know

    Directory of Open Access Journals (Sweden)

    Natalia Delage Gomes

    2013-06-01

    Full Text Available Cochlear implant is the method of choice in the treatment of deep sensorineural hypoacusis, particularly in patients where conventional amplification devices do not imply noticeable clinical improvement. Imaging findings are crucial in the indication or contraindication for such surgical procedure. In the assessment of the temporal bone, radiologists should be familiar with relative or absolute contraindication factors, as well as with factors that might significantly complicate the implantation. Some criteria such as cochlear nerve aplasia, labyrinthine and/or cochlear aplasia are still considered as absolute contraindications, in spite of studies bringing such criteria into question. Cochlear dysplasias constitute relative contraindications, among them labyrinthitis ossificans is highlighted. Other alterations may be mentioned as complicating agents in the temporal bone assessment, namely, hypoplasia of the mastoid process, aberrant facial nerve, otomastoiditis, otosclerosis, dehiscent jugular bulb, enlarged endolymphatic duct and sac. The experienced radiologist assumes an important role in the evaluation of this condition.

  2. Cochlear implantation in postlingually hearing-impaired adults : Choosing the most appropriate ear

    NARCIS (Netherlands)

    van den Broek, Emke; Dunnebier, Erwin Alexander

    2009-01-01

    Choice of the most appropriate car for CI in postlingually hearing-impaired adults is becoming more relevant as more patients are considered eligible for intervention. The aim of this stud), is to review factors that influence this choice and to formulate a flowchart. An extensive Medline search was

  3. Audiological outcomes of cochlear implantation in Waardenburg Syndrome

    Directory of Open Access Journals (Sweden)

    Magalhães, Ana Tereza de Matos

    2014-01-01

    Full Text Available Introduction: The most relevant clinical symptom in Waardenburg syndrome is profound bilateral sensorioneural hearing loss. Aim: To characterize and describe hearing outcomes after cochlear implantation in patients with Waardenburg syndrome to improve preoperative expectations. Method: This was an observational and retrospective study of a series of cases. Children who were diagnosed with Waardenburg syndrome and who received a multichannel cochlear implant between March 1999 and July 2012 were included in the study. Intraoperative neural response telemetry, hearing evaluation, speech perception, and speech production data before and after surgery were assessed. Results: During this period, 806 patients received a cochlear implant and 10 of these (1.2% were diagnosed with Waardenburg syndrome. Eight of the children received a Nucleus 24® implant and 1 child and 1 adult received a DigiSonic SP implant. The mean age at implantation was 44 months among the children. The average duration of use of a cochlear implant at the time of the study was 43 months. Intraoperative neural responses were present in all cases. Patients who could use the speech processor effectively had a pure tone average of 31 dB in free-field conditions. In addition, the MUSS and MAIS questionnaires revealed improvements in speech perception and production. Four patients did not have a good outcome, which might have been associated with ineffective use of the speech processor. Conclusion: Despite the heterogeneity of the group, patients with Waardenburg syndrome who received cochlear implants were found to have hearing thresholds that allowed access to speech sounds. However, patients who received early intervention and rehabilitation showed better evolution of auditory perception.

  4. Residual neural processng of musical sound features in adult cochlear implant users

    DEFF Research Database (Denmark)

    Timm, Lydia; Vuust, Peter; Brattico, Elvira;

    2014-01-01

    controls in neural discrimination of pitch-based features, they do possess potential neural abilities for music processing. However, CI users showed a disrupted ability to automatically discriminate rhythmic changes compared with controls. The current behavioral and MMN findings highlight the residual...... and behavioral study comparing adult CI users with normal-hearing age-matched controls (NH controls). We used a newly developed musical multi-feature paradigm, which makes it possible to test automatic auditory discrimination of six different types of sound feature changes inserted within a musical enriched...... to changes in intensity and saxophone timber. Furthermore, the MMNs in CI users reflected the behavioral scores from a respective discrimination task and were correlated with patients' age and speech intelligibility. Our results suggest that even though CI users are not performing at the same level as NH...

  5. Sound localization ability of young children with bilateral cochlear implants.

    NARCIS (Netherlands)

    Beijen, J.W.; Snik, A.F.M.; Mylanus, E.A.M.

    2007-01-01

    OBJECTIVE: To evaluate the benefit of bilateral cochlear implantation in young children. STUDY DESIGN: Clinical trial comparing a group of bilaterally implanted children with a group of unilaterally implanted children. SETTING: Tertiary referral center. PATIENTS: Five bilaterally implanted children

  6. Successful outcomes of cochlear implantation in long-term unilateral deafness: brain plasticity?

    Science.gov (United States)

    Távora-Vieira, Dayse; Boisvert, Isabelle; McMahon, Catherine M; Maric, Vesna; Rajan, Gunesh P

    2013-09-11

    To investigate the implications of duration of deafness in the rehabilitation of unilateral deafness utilizing cochlear implantation. From the ongoing prospective cochlear implantation in unilateral deafness study, we looked at five adults who received a cochlear implant for long-term unilateral deafness. Speech perception in noise and subjective evaluation of the benefits of cochlear implantation were measured at 3, 6, and 12 months after implantation. The results were analyzed and compared with published data from normal hearing individuals and adults using cochlear implants bilaterally. Analysis of speech perception in noise showed significant improvement for three spatial configurations: speech and noise from the front (S0/N0; P=0.003), speech from the front and noise from the normal hearing ear (S0/NHE; P=0.001), speech from the implanted ear, and noise from the normal hearing ear (SCI/NHE; Pdeafness obtained scores in speech perception testing and in subjective evaluation that are similar to those attained by individuals with normal hearing and/or those with bilateral cochlear implants. Therefore, patients with postlingual unilateral deafness should not be excluded as cochlear implant candidates on the basis of a long duration of deafness.

  7. Anatomic considerations of cochlear morphology and its implications for insertion trauma in cochlear implant surgery.

    NARCIS (Netherlands)

    Verbist, B.M.; Ferrarini, L.; Briaire, J.J.; Zarowski, A.; Admiraal-Behloul, F.; Olofsen, H.; Reiber, J.H.C.; Frijns, J.H.

    2009-01-01

    HYPOTHESIS: The goal of this study is to analyze the 3-dimensional anatomy of the cochlear spiral and to investigate the consequences of its course to insertion trauma during cochlear implantation. BACKGROUND: Insertion trauma in cochlear implant surgery is a feared surgical risk, potentially causin

  8. REZ-Ⅰ型人工耳蜗植入对成人残余听力的影响%Effect of REZ-Ⅰ cochlear implantation on residual hearing in adult patients

    Institute of Scientific and Technical Information of China (English)

    陶朵朵; 陈兵; 王正敏; 迟放鲁; 李华伟

    2010-01-01

    Objective To evaluate the effect of cochlear implantation with REZ-Ⅰ straight electrodes on residual hearing of postlingually deafened adults, and to explore the audiologically safety and injury characteristics of cochlear implantation. Methods Sixteen unilateral REZ-Ⅰ (22 channels) cochlear implantation recipients from September 2009 to December 2009 were picked out. Their pre-and postimplantation audiometry data including pure-tone audiometry (PTA), auditory steady-state responses (ASSR), auditory brainstem responses(ABR) and distortion product otoacoustic emissions(DPOAE) were retrospectively analyzed, in order to compare the change between pre- and post-implantation residual hearing. Results Among the 12 recipients who had some measurable residual hearing before implantation,5 (41.6%) patients had conserved some measurable hearing but the other 7 (58.4%) recipients had lost all measurable hearing after implantation on the implanted side. The implanted ears had an average PTA threshold drop of 9.5 dB HL and a statistically significant difference between pre- and post-implantation (P0.05).结论 REZ-Ⅰ型人工耳蜗植入会对植入侧残余听力造成一定程度的损伤.

  9. [Long-latency auditory evoked potentials in cochlear implants].

    Science.gov (United States)

    Mata, J J; Jiménez, J M; Pérez, J; Postigo, A; Roldán, B

    1999-01-01

    Cortical evoked potentials were evaluated in patients with cochlear implants. In a group of 8 adults of different ages, the lingual state before implantation and during rehabilitation were evaluated. Using cortical evoked potentials, the results of the P300 wave in response to two tones, one frequent (1,000 Hz) and the other infrequent (2,000 Hz), presented at 70 and 80 dB HL were studied. Results were analyzed and compared in relation to locutive state, rehabilitation stage, and intensity of stimulus. Absolute latencies did not differ significantly. However, latency values in relation to reaction time were significantly longer in prelingual than in postlingual patients (p test). The results confirmed the normality of central cognitive processes in patients with cochlear implants in objective assessment of P300 latency. The results suggest differences between prelingual and postlingual patients in relation to central signal processing.

  10. Cross-Modal Functional Reorganization of Visual and Auditory Cortex in Adult Cochlear Implant Users Identified with fNIRS.

    Science.gov (United States)

    Chen, Ling-Chia; Sandmann, Pascale; Thorne, Jeremy D; Bleichner, Martin G; Debener, Stefan

    2016-01-01

    Cochlear implant (CI) users show higher auditory-evoked activations in visual cortex and higher visual-evoked activation in auditory cortex compared to normal hearing (NH) controls, reflecting functional reorganization of both visual and auditory modalities. Visual-evoked activation in auditory cortex is a maladaptive functional reorganization whereas auditory-evoked activation in visual cortex is beneficial for speech recognition in CI users. We investigated their joint influence on CI users' speech recognition, by testing 20 postlingually deafened CI users and 20 NH controls with functional near-infrared spectroscopy (fNIRS). Optodes were placed over occipital and temporal areas to measure visual and auditory responses when presenting visual checkerboard and auditory word stimuli. Higher cross-modal activations were confirmed in both auditory and visual cortex for CI users compared to NH controls, demonstrating that functional reorganization of both auditory and visual cortex can be identified with fNIRS. Additionally, the combined reorganization of auditory and visual cortex was found to be associated with speech recognition performance. Speech performance was good as long as the beneficial auditory-evoked activation in visual cortex was higher than the visual-evoked activation in the auditory cortex. These results indicate the importance of considering cross-modal activations in both visual and auditory cortex for potential clinical outcome estimation.

  11. Cross-Modal Functional Reorganization of Visual and Auditory Cortex in Adult Cochlear Implant Users Identified with fNIRS

    Directory of Open Access Journals (Sweden)

    Ling-Chia Chen

    2016-01-01

    Full Text Available Cochlear implant (CI users show higher auditory-evoked activations in visual cortex and higher visual-evoked activation in auditory cortex compared to normal hearing (NH controls, reflecting functional reorganization of both visual and auditory modalities. Visual-evoked activation in auditory cortex is a maladaptive functional reorganization whereas auditory-evoked activation in visual cortex is beneficial for speech recognition in CI users. We investigated their joint influence on CI users’ speech recognition, by testing 20 postlingually deafened CI users and 20 NH controls with functional near-infrared spectroscopy (fNIRS. Optodes were placed over occipital and temporal areas to measure visual and auditory responses when presenting visual checkerboard and auditory word stimuli. Higher cross-modal activations were confirmed in both auditory and visual cortex for CI users compared to NH controls, demonstrating that functional reorganization of both auditory and visual cortex can be identified with fNIRS. Additionally, the combined reorganization of auditory and visual cortex was found to be associated with speech recognition performance. Speech performance was good as long as the beneficial auditory-evoked activation in visual cortex was higher than the visual-evoked activation in the auditory cortex. These results indicate the importance of considering cross-modal activations in both visual and auditory cortex for potential clinical outcome estimation.

  12. Audiological findings from an adult with thin cochlear nerves

    Science.gov (United States)

    Prabhu, Prashanth; Shivaswamy, Jyothi

    2017-01-01

    Summary Reported here are audiological findings from an adult with thin cochlear nerves. Magnetic resonance imaging (MRI) revealed that he had a thinner cochlear nerve in the left ear than in the right ear. He had a higher degree of hearing loss in the left ear and poor speech recognition scores for both ears. He had normal middle ear and cochlear functioning. The auditory brainstem response and acoustic reflexes were absent, indicating a retrocochlear pathology. Long latency responses (LLR) revealed normal cortical functioning. Hence, implantation of an auditory brainstem implant might be an option, but the patient would need to be aware of its limitations. This case highlights the importance of MRI in evaluating congenital malformations of the cochlear nerve when audiological findings indicate a retrocochlear pathology. PMID:28357188

  13. Evaluation of Evoked Potentials to Dyadic Tones after Cochlear Implantation

    Science.gov (United States)

    Sandmann, Pascale; Eichele, Tom; Buechler, Michael; Debener, Stefan; Jancke, Lutz; Dillier, Norbert; Hugdahl, Kenneth; Meyer, Martin

    2009-01-01

    Auditory evoked potentials are tools widely used to assess auditory cortex functions in clinical context. However, in cochlear implant users, electrophysiological measures are challenging due to implant-created artefacts in the EEG. Here, we used independent component analysis to reduce cochlear implant-related artefacts in event-related EEGs of…

  14. Serving Deaf Students Who Have Cochlear Implants. PEPNet Tipsheet

    Science.gov (United States)

    Searls, J. Matt, Comp.

    2010-01-01

    Cochlear implants (CIs) are complex electronic devices surgically implanted under the skin behind the ear. These devices utilize electrodes placed in the inner ear (the cochlea) to stimulate the auditory nerve of individuals with significant permanent hearing loss. Cochlear implants may not be suitable for everyone. They are designed to provide…

  15. [Cochlear implant for malformations of the inner ear].

    Science.gov (United States)

    Aschendorff, A; Laszig, R; Maier, W; Beck, R; Schild, C; Birkenhäger, R; Wesarg, T; Kröger, S; Arndt, S

    2009-06-01

    The radiologic evaluation of the temporal bone in cochlear implant candidates can detect malformations of the inner ear in up to 20% of cases. The aim of our study was to analyze and classify malformations of the inner ear in patients with cochlear implants carried out from 2001 to 2009. Malformations of the inner ear, including malformations of the internal auditory canal were detected in 12.7% of children and 3.4% of adults. Mondini dysplasia was most common and occurred in 45% of cases. The surgical procedure had to be adapted according to the individual malformation. Modification of surgical access, management of intraoperative CSF gusher, choice of electrode array, intraoperative imaging and the use of navigation were the most important factors. Rehabilitation results were generally very positive and corresponded to the expectation depending on the duration of deafness, if no additional handicaps were present.

  16. Prevalence of inner ear anomalies among cochlear implant candidates

    OpenAIRE

    Aldhafeeri, Ahmad M.; Alsanosi, Abdulrahman A.

    2016-01-01

    Objectives: To determine the prevalence of inner ear anomalies and the frequency of different anomaly types among cochlear implant recipients. Methods: This study included a retrospective chart review of all patients who received cochlear implants between January 2009 and January 2013 in King Abdulaziz University Hospital cochlear implant program in Riyadh, Saudi Arabia. All subjects underwent thin-cut CT of the temporal bone and MRI. The collected data included age, gender, and CT and MRI fi...

  17. INDICATION AND SURGICAL CONSIDERATION OF COCHLEAR IMPLANTATION AT WAHIDIN HOSPITAL

    OpenAIRE

    Savitri, Eka

    2014-01-01

    OBJECTIVES To demonstrate selection criteria for cochlear implant candidates as well as the outcome of quality of life (QoL) after cochlearimplant surgery. MATERIAL AND METHOD Retrospective review was performed of all cochlear implants at Wahidin Hospital. A total number of 5 cochlear implantations were performed during the period of April 2003 to April 2004. Inclusion criteria were established and the audiological criteria were then evaluated using the OAE, BERA and ASSR test. The e...

  18. Cochlear implant: what the radiologist should know

    OpenAIRE

    Natalia Delage Gomes; Caroline Laurita Batista Couto; Juliana Oggioni Gaiotti; Ana Maria Doffemond Costa; Marcelo Almeida Ribeiro; Renata Lopes Furletti Caldeira Diniz

    2013-01-01

    Cochlear implant is the method of choice in the treatment of deep sensorineural hypoacusis, particularly in patients where conventional amplification devices do not imply noticeable clinical improvement. Imaging findings are crucial in the indication or contraindication for such surgical procedure. In the assessment of the temporal bone, radiologists should be familiar with relative or absolute contraindication factors, as well as with factors that might significantly complicate the implantat...

  19. Accurate guitar tuning by cochlear implant musicians.

    Science.gov (United States)

    Lu, Thomas; Huang, Juan; Zeng, Fan-Gang

    2014-01-01

    Modern cochlear implant (CI) users understand speech but find difficulty in music appreciation due to poor pitch perception. Still, some deaf musicians continue to perform with their CI. Here we show unexpected results that CI musicians can reliably tune a guitar by CI alone and, under controlled conditions, match simultaneously presented tones to electric analysis, showed that accurate tuning was achieved by listening to beats rather than discriminating pitch, effectively turning a spectral task into a temporal discrimination task.

  20. Cochlear implant outcomes and genetic mutations in children with ear and brain anomalies

    OpenAIRE

    Busi, Micol

    2013-01-01

    Introduction. Cochlear implantation (CI) was a significant surgical innovation in the 20th century and represented the first artificial sensory organ that was applied in clinical medicine. Currently, CI is still one of the most effective medical procedures. Nonetheless, cochlear implantation in adults and children represents a controversial issue from an economic, clinical and ethical point of view, especially in specific clinical conditions that could compromise the CI outcome and drasticall...

  1. Hearing Preservation in Cochlear Implant Surgery

    Directory of Open Access Journals (Sweden)

    Priscila Carvalho Miranda

    2014-01-01

    Full Text Available In the past, it was thought that hearing loss patients with residual low-frequency hearing would not be good candidates for cochlear implantation since insertion was expected to induce inner ear trauma. Recent advances in electrode design and surgical techniques have made the preservation of residual low-frequency hearing achievable and desirable. The importance of preserving residual low-frequency hearing cannot be underestimated in light of the added benefit of hearing in noisy atmospheres and in music quality. The concept of electrical and acoustic stimulation involves electrically stimulating the nonfunctional, high-frequency region of the cochlea with a cochlear implant and applying a hearing aid in the low-frequency range. The principle of preserving low-frequency hearing by a “soft surgery” cochlear implantation could also be useful to the population of children who might profit from regenerative hair cell therapy in the future. Main aspects of low-frequency hearing preservation surgery are discussed in this review: its brief history, electrode design, principles and advantages of electric-acoustic stimulation, surgical technique, and further implications of this new treatment possibility for hearing impaired patients.

  2. Functional Near-Infrared Spectroscopy Brain Imaging Investigation of Phonological Awareness and Passage Comprehension Abilities in Adult Recipients of Cochlear Implants

    Science.gov (United States)

    Bisconti, Silvia; Shulkin, Masha; Hu, Xiaosu; Basura, Gregory J.; Kileny, Paul R.; Kovelman, Ioulia

    2016-01-01

    Purpose: The aim of this study was to examine how the brains of individuals with cochlear implants (CIs) respond to spoken language tasks that underlie successful language acquisition and processing. Method: During functional near-infrared spectroscopy imaging, CI recipients with hearing impairment (n = 10, mean age: 52.7 ± 17.3 years) and…

  3. Hearing Preservation after Cochlear Implantation: UNICAMP Outcomes

    Directory of Open Access Journals (Sweden)

    Guilherme Machado de Carvalho

    2013-01-01

    Full Text Available Background. Electric-acoustic stimulation (EAS is an excellent choice for people with residual hearing in low frequencies but not high frequencies and who derive insufficient benefit from hearing aids. For EAS to be effective, subjects' residual hearing must be preserved during cochlear implant (CI surgery. Methods. We implanted 6 subjects with a CI. We used a special surgical technique and an electrode designed to be atraumatic. Subjects' rates of residual hearing preservation were measured 3 times postoperatively, lastly after at least a year of implant experience. Subjects' aided speech perception was tested pre- and postoperatively with a sentence test in quiet. Subjects' subjective responses assessed after a year of EAS or CI experience. Results. 4 subjects had total or partial residual hearing preservation; 2 subjects had total residual hearing loss. All subjects' hearing and speech perception benefited from cochlear implantation. CI diminished or eliminated tinnitus in all 4 subjects who had it preoperatively. 5 subjects reported great satisfaction with their new device. Conclusions. When we have more experience with our surgical technique we are confident we will be able to report increased rates of residual hearing preservation. Hopefully, our study will raise the profile of EAS in Brazil and Latin/South America.

  4. Learning and Memory Processes Following Cochlear Implantation:The Missing Piece of the Puzzle

    Directory of Open Access Journals (Sweden)

    David B. Pisoni

    2016-04-01

    Full Text Available At the present time, there is no question that cochlear implants work and often work very well in quiet listening conditions for many profoundly deaf children and adults. The speech and language outcomes data published over the last two decades document quite extensively the clinically significant benefits of cochlear implants. Although there now is a large body of evidence supporting the efficacy of cochlear implants as a medical intervention for profound hearing loss in both children and adults, there still remain a number of challenging unresolved clinical and theoretical issues that deal with the effectiveness of cochlear implants in individual patients that have not yet been successfully resolved. In this paper, we review recent findings on learning and memory, two central topics in the field of cognition that have been seriously neglected in research on cochlear implants. Our research findings on sequence learning, memory and organization processes, and retrieval strategies used in verbal learning and memory of categorized word lists suggests that basic domain-general learning abilities may be the missing piece of the puzzle in terms of understanding the cognitive factors that underlie the enormous individual differences and variability routinely observed in speech and language outcomes following cochlear implantation.

  5. A Literature Analysis of Themes in Paediatric Cochlear Implant Research

    DEFF Research Database (Denmark)

    Hendar, Nils Ola Ebbe; Dammeyer, Jesper Herup

    2015-01-01

    Research on children with cochlear implants (CI) has documented positive outcomes, but also that many still experience language delays. The aim of this article is to explore how research on children with cochlear implants cover topics of early language development compared to research on children...

  6. An Introduction to Cochlear Implant Technology, Activation, and Programming.

    Science.gov (United States)

    Moore, Jan A.; Teagle, Holly F. B.

    2002-01-01

    This article provides information about the hardware components and speech-processing strategies of cochlear implant systems. The use of assistive listening devices with cochlear implants is also discussed. A brief description of surgical procedures and the initial activation of the device are also presented, along with programming considerations.…

  7. Speech Intelligibility and Prosody Production in Children with Cochlear Implants

    Science.gov (United States)

    Chin, Steven B.; Bergeson, Tonya R.; Phan, Jennifer

    2012-01-01

    Objectives: The purpose of the current study was to examine the relation between speech intelligibility and prosody production in children who use cochlear implants. Methods: The Beginner's Intelligibility Test (BIT) and Prosodic Utterance Production (PUP) task were administered to 15 children who use cochlear implants and 10 children with normal…

  8. Evaluating the Feasibility of Using Remote Technology for Cochlear Implants

    Science.gov (United States)

    Goehring, Jenny L.; Hughes, Michelle L.; Baudhuin, Jacquelyn L.

    2012-01-01

    The use of remote technology to provide cochlear implant services has gained popularity in recent years. This article contains a review of research evaluating the feasibility of remote service delivery for recipients of cochlear implants. To date, published studies have determined that speech-processor programming levels and other objective tests…

  9. The Perception of Music Melody and Timbre in Adult Cochlear Implant Recipients%成人人工耳蜗植入者音乐旋律和音色感知研究

    Institute of Scientific and Technical Information of China (English)

    刘子夜; 章昊; 刘博; 亓贝尔; 王硕

    2013-01-01

    Objective To assess the music melody and timbre perception abilities of adults with cochlear implants. Methods Thirteen adult cochlear implant recipients and forty normal-hearing adults participated in this study. Munich music questionnaire(MUMU) and musical sounds in cochlear implant(Mu.S.I.C) were used to assess the music experience, melody and timbre perception for both normal-hearing adults and adult cochlear implant recipients. Results The age and music experience of normal-hearing subjects and cochlear implant subjects matched each other. The average scores of melody discrimination and instrument identification test for cochlear implant recipients were 69.3% and 51.2%,respectively.The average scores of melody discrimination and instrument identification for normal-hearing participants were 80.4% and 85.3%, respectively. The differences between the two groups were significant (P=0.000). Conclusion The adult cochlear implant recipients perform significantly poorer in melody and timbre perception in comparison with normal-hearing listeners.%目的:评价成人人工耳蜗植入者对音乐旋律及音色的感知能力。方法对13例人工耳蜗植入者(男8例,女5例,平均年龄26.5±6.9岁)分别进行音乐聆听行为评估和旋律辨别、乐器辨别测试。实验使用慕尼黑音乐经验问卷MUMU(Munich music questionnaire)和人工耳蜗音乐评估软件Mu.S.I.C (musical sounds in cochlear implant)进行评估。对照组为40例听力正常受试者(男21例,女19例,平均年龄26.8±6.7岁)。结果①人工耳蜗组与听力正常组的年龄及音乐经验相互匹配。②人工耳蜗组旋律辨别平均正确率为69.3%,乐器辨别平均正确率为51.2%;听力正常组旋律辨别平均正确率为80.4%,乐器辨别平均正确率为85.3%。两组比较,差异存在统计学意义(P=0.000)。结论成人人工耳蜗植入者的旋律感知能力和音色感知能力明显落后于听力正常者。

  10. Exploring Perspectives on Cochlear Implants and Language Acquisition within the Deaf Community

    Science.gov (United States)

    Gale, Elaine

    2011-01-01

    Cochlear implants generated intense debate almost immediately following their introduction in the 1980s. Today, with a vast number of deaf individuals with cochlear implants, the debate about the cochlear implant device and mode of communication continues. Q-methodology was used in this study to explore cochlear implants and language acquisition…

  11. The identification of musical instruments through nucleus cochlear implants.

    Science.gov (United States)

    Grasmeder, M L; Lutman, M E

    2006-09-01

    In this study, self-reported ability to recognize musical instruments was investigated by means of a questionnaire, which was sent to a group of adult Nucleus cochlear implant users and a group of normally hearing subjects. In addition, spectrograms and electrodograms were produced and analysed for samples of music played on 10 different musical instruments. Self-reported ability to recognize some instruments was poor in the group of implant users, particularly for the saxophone, tuba and clarinet. Electrodograms showed that these instruments could only be identified using distorted spectral information or reduced temporal information. Other instruments, such as the drum and piano, could be identified using temporal information. Limited spectral resolution makes the recognition of musical instruments difficult for Nucleus implant users.

  12. Aging, Cognitive Decline and Hearing Loss: Effects of Auditory Rehabilitation and Training with Hearing Aids and Cochlear Implants on Cognitive Function and Depression among Older Adults.

    Science.gov (United States)

    Castiglione, Alessandro; Benatti, Alice; Velardita, Carmelita; Favaro, Diego; Padoan, Elisa; Severi, Daniele; Pagliaro, Michela; Bovo, Roberto; Vallesi, Antonino; Gabelli, Carlo; Martini, Alessandro

    2016-01-01

    A growing interest in cognitive effects associated with speech and hearing processes is spreading throughout the scientific community essentially guided by evidence that central and peripheral hearing loss is associated with cognitive decline. For the present research, 125 participants older than 65 years of age (105 with hearing impairment and 20 with normal hearing) were enrolled, divided into 6 groups according to their degree of hearing loss and assessed to determine the effects of the treatment applied. Patients in our research program routinely undergo an extensive audiological and cognitive evaluation protocol providing results from the Digit Span test, Stroop color-word test, Montreal Cognitive Assessment and Geriatric Depression Scale, before and after rehabilitation. Data analysis was performed for a cross-sectional and longitudinal study of the outcomes for the different treatment groups. Each group demonstrated improvement after auditory rehabilitation or training on short- and long-term memory tasks, level of depression and cognitive status scores. Auditory rehabilitation by cochlear implants or hearing aids is effective also among older adults (median age of 74 years) with different degrees of hearing loss, and enables positive improvements in terms of social isolation, depression and cognitive performance.

  13. Stochastic beamforming for cochlear implant coding

    Science.gov (United States)

    Morse, Robert P.; Holmes, Stephen D.; Shulgin, Boris; Nikitin, Alexander; Stocks, Nigel G.

    2007-06-01

    Cochlear implants are prosthetic devices used to provide hearing to people who would otherwise be profoundly deaf. The deliberate addition of noise to the electrode signals could increase the amount of information transmitted, but standard cochlear implants do not replicate the noise characteristic of normal hearing because if noise is added in an uncontrolled manner with a limited number of electrodes then it will almost certainly lead to worse performance. Only if partially independent stochastic activity can be achieved in each nerve fibre can mechanisms like suprathreshold stochastic resonance be effective. We are investigating the use of stochastic beamforming to achieve greater independence. The strategy involves presenting each electrode with a linear combination of independent Gaussian noise sources. Because the cochlea is filled with conductive salt solutions, the noise currents from the electrodes interact and the effective stimulus for each nerve fibre will therefore be a different weighted sum of the noise sources. To some extent therefore, the effective stimulus for a nerve fibre will be independent of the effective stimulus of neighbouring fibres. For a particular patient, the electrode position and the amount of current spread are fixed. The objective is therefore to find the linear combination of noise sources that leads to the greatest independence between nerve discharges. In this theoretical study we show that it is possible to get one independent point of excitation (one null) for each electrode and that stochastic beamforming can greatly decrease the correlation between the noise exciting different regions of the cochlea.

  14. "COCHLEAR IMPLANTATION IN PATIENTS WITH INNER EAR MALFORMATIONS"

    OpenAIRE

    P. Borghei S. Abdi; M. Motesaddi Zari; Khalessi MH

    2004-01-01

    Performing cochlear implantation in patients with inner ear malformation has always been a matter of dispute. This study was designed to analyze the operative findings,complications, and postoperative performance of patients with inner ear anomalies who underwent cochlear implantation. Six patients with inner ear malformations underwent implantation in our academic tertiary referral center from 1997 to 2002. The average follow-up period was 27 months. Malformations included one incomplete par...

  15. Facial nerve stimulation after cochlear implantation: our experience

    OpenAIRE

    BERRETTINI, S.; De Vito, A.; Bruschini, L.; PASSETTI, S.; Forli, F.

    2011-01-01

    SUMMARY Post-implantation facial nerve stimulation is one of the best known and most frequent complications of the cochlear implant procedure. Some conditions, such as otosclerosis and cochlear malformations, as well as high stimulation levels that may be necessary in patients with long auditory deprivation, expose patients to a higher risk of developing post-implant facial nerve stimulation. Facial nerve stimulation can frequently be resolved with minimal changes in speech processor fitting ...

  16. Current status and correlated issues on cochlear implantation

    Institute of Scientific and Technical Information of China (English)

    CAO Ke-li; WANG Lin-e

    2006-01-01

    @@ Cochlear implant is a biomedical device, which can directly stimulate the auditory nerve pass-by the damaged hair cell to recover and rebuild the hearing of deaf people. The implant can also stimulate the auditory brainstem and cortex in patients whose auditory nerve is not accessible because of acoustic tumors. Cochlear implantation can make the patients generate electrical hearing (artificial hearing).The artificial hearing can recover,improve or rebuild the hearing of deaf people through electrical stimulus.

  17. Studying the Language Development in Children with Cochlear Implant

    Directory of Open Access Journals (Sweden)

    Marjan Sabri leghaie

    1996-04-01

    Full Text Available Cochlear implant surgery is aimed at making a comprehensive packet of information for the deaf by mixing the data acquired by implanted device and the communicational grammar. Although language production and ability of communication are not main factors in determining the candidacy for cochlear implant surgery, they play crucial role in determining cochlear implant success. we should study the communication skills much deeper than a simple perception and production of speech to have a reasonable evaluation of development of Auditory integration and grammatical language structure. Hence in the current article we will first discuss the grammatical structure in language and then have a look at the pragmatics , semantics and phonological aspects in children with cochlear implant in Virginia college in USA.

  18. Visual Cross-Modal Re-Organization in Children with Cochlear Implants.

    Directory of Open Access Journals (Sweden)

    Julia Campbell

    Full Text Available Visual cross-modal re-organization is a neurophysiological process that occurs in deafness. The intact sensory modality of vision recruits cortical areas from the deprived sensory modality of audition. Such compensatory plasticity is documented in deaf adults and animals, and is related to deficits in speech perception performance in cochlear-implanted adults. However, it is unclear whether visual cross-modal re-organization takes place in cochlear-implanted children and whether it may be a source of variability contributing to speech and language outcomes. Thus, the aim of this study was to determine if visual cross-modal re-organization occurs in cochlear-implanted children, and whether it is related to deficits in speech perception performance.Visual evoked potentials (VEPs were recorded via high-density EEG in 41 normal hearing children and 14 cochlear-implanted children, aged 5-15 years, in response to apparent motion and form change. Comparisons of VEP amplitude and latency, as well as source localization results, were conducted between the groups in order to view evidence of visual cross-modal re-organization. Finally, speech perception in background noise performance was correlated to the visual response in the implanted children.Distinct VEP morphological patterns were observed in both the normal hearing and cochlear-implanted children. However, the cochlear-implanted children demonstrated larger VEP amplitudes and earlier latency, concurrent with activation of right temporal cortex including auditory regions, suggestive of visual cross-modal re-organization. The VEP N1 latency was negatively related to speech perception in background noise for children with cochlear implants.Our results are among the first to describe cross modal re-organization of auditory cortex by the visual modality in deaf children fitted with cochlear implants. Our findings suggest that, as a group, children with cochlear implants show evidence of visual cross

  19. Surgical Management of the Pediatric Cochlear Implant Patient.

    Science.gov (United States)

    Cohen, Seth M.; Haynes, David S.

    2003-01-01

    This article discusses the surgical management of children receiving cochlear implants. It identifies preoperative considerations to select patients likely to benefit, contraindications, some new surgical techniques, complications, special considerations (otitis media, meningitis, head growth, inner ear malformations, and cochlear obstruction).…

  20. Avaliação da percepção da fala com ruído competitivo em adultos com implante coclear Evaluation of speech perception in noise in cochlear implanted adults

    Directory of Open Access Journals (Sweden)

    Leandra Tabanez do Nascimento

    2005-08-01

    Full Text Available OBJETIVOS: Avaliar os efeitos das diferentes relações sinal/ruído no reconhecimento da fala com o implante coclear (IC; comparar o reconhecimento da fala no ruído com diferentes tipos de implantes cocleares (ICs multicanais e avaliar o grau de dificuldade dos usuários de IC em situações com ruído competitivo no dia-a-dia. FORAMA DE ESTUDO: coorte transversal. MATERIAL E MÉTODO: Quarenta adultos com deficiência auditiva pós-lingual, com os IC Nucleus 22, Nucleus 24, Combi 40, Combi 40+ e Clarion. Foi avaliado o reconhecimento das sentenças CPA no silêncio e nas relações S/R de +15 dB, +10 dB, +5 dB e aplicado o questionário Social Hearing Handicap Index (SHHI para a auto-avaliação do desempenho com o IC. RESULTADOS E CONCLUSÕES: Os usuários de todos os tipos de IC apresentaram redução significativa dos índices de reconhecimento de sentenças CPA em função da diminuição da relação S/R, a curva das medianas de reconhecimento das sentenças CPA alcançou 50% na relação S/R de +10 dB. Não houve diferença estatisticamente significante nos índices de reconhecimento das sentenças CPA e escores de dificuldade do SHHI, obtidos com os diferentes tipos de ICs. As dificuldades dos usuários de IC foram raras nas situações de silêncio e ocasionais nas situações com ruído competitivo no questionário SHHI.AIM: to evaluate the effects of different signal-to-noise ratios on speech recognition obtained by the use of cochlear implant (CI; to compare the speech recognition in noise with different types of multichannel cochlear implants (CIs and to evaluate the degree of difficulty for speech understanding in noise in daily life situations. STUDY DESIGN: cohort transversal. MATERIAL AND METHOD: Forty adults with post-lingual hearing loss implanted with Nucleus 22, Nucleus 24, Combi 40, Combi 40+ and Clarion. We evaluated the recognition for CPA sentences in quiet and in S/N +15, +10 and +5 dB. We also applied the Social

  1. Signal Processing Strategies for Cochlear Implants Using Current Steering

    Directory of Open Access Journals (Sweden)

    Waldo Nogueira

    2009-01-01

    Full Text Available In contemporary cochlear implant systems, the audio signal is decomposed into different frequency bands, each assigned to one electrode. Thus, pitch perception is limited by the number of physical electrodes implanted into the cochlea and by the wide bandwidth assigned to each electrode. The Harmony HiResolution bionic ear (Advanced Bionics LLC, Valencia, CA, USA has the capability of creating virtual spectral channels through simultaneous delivery of current to pairs of adjacent electrodes. By steering the locus of stimulation to sites between the electrodes, additional pitch percepts can be generated. Two new sound processing strategies based on current steering have been designed, SpecRes and SineEx. In a chronic trial, speech intelligibility, pitch perception, and subjective appreciation of sound were compared between the two current steering strategies and standard HiRes strategy in 9 adult Harmony users. There was considerable variability in benefit, and the mean results show similar performance with all three strategies.

  2. Ultra-Wideband Transceivers for Cochlear Implants

    Directory of Open Access Journals (Sweden)

    Reisenzahn Alexander

    2005-01-01

    Full Text Available Ultra-wideband (UWB radio offers low power consumption, low power spectral density, high immunity against interference, and other benefits, not only for consumer electronics, but also for medical devices. A cochlear implant (CI is an electronic hearing apparatus, requiring a wireless link through human tissue. In this paper we propose an UWB link for a data rate of Mbps and a propagation distance up to 500 mm. Transmitters with step recovery diode and transistor pulse generators are proposed. Two types of antennas and their filter characteristics in the UWB spectrum will be discussed. An ultra-low-power back tunnel diode receiver prototype is described and compared with conventional detector receivers.

  3. Accurate guitar tuning by cochlear implant musicians.

    Directory of Open Access Journals (Sweden)

    Thomas Lu

    Full Text Available Modern cochlear implant (CI users understand speech but find difficulty in music appreciation due to poor pitch perception. Still, some deaf musicians continue to perform with their CI. Here we show unexpected results that CI musicians can reliably tune a guitar by CI alone and, under controlled conditions, match simultaneously presented tones to <0.5 Hz. One subject had normal contralateral hearing and produced more accurate tuning with CI than his normal ear. To understand these counterintuitive findings, we presented tones sequentially and found that tuning error was larger at ∼ 30 Hz for both subjects. A third subject, a non-musician CI user with normal contralateral hearing, showed similar trends in performance between CI and normal hearing ears but with less precision. This difference, along with electric analysis, showed that accurate tuning was achieved by listening to beats rather than discriminating pitch, effectively turning a spectral task into a temporal discrimination task.

  4. Cochlear implantation at the ear, nose and throat clinic of the Clinical center of Vojvodina

    Directory of Open Access Journals (Sweden)

    Komazec Zoran

    2007-01-01

    Full Text Available Introduction. A cochlear implant is a small electronic device that can provide a sense of sound to a person who is profoundly deaf or severely hard-of-hearing. Cochlear implants bypass the damaged hearing systems and directly stimulate the auditory nerve. Signals generated by the implant are sent by way of the auditory nerve to the brain, which recognizes the signals as sound. Hearing through a cochlear implant differs from normal hearing and takes time to learn or relearn. Cochlear implantations have been performed at the ENT Clinic in Novi Sad since 2002. The aim of this retrospective investigation was to evaluate performance of cochlear implanted patients in regard to the age of hearing loss identification, age at implantation, as well as complications. Material and Methods. During a 5-year period (2002-2007, 45 patients underwent cochlear implantation (46 implants at the ENT Clinic in Novi Sad. Only four patients were postlingually deaf adults. Forty-one implanted patients were children with a mean age at implantation of 42.2 months (range: 2 to 8 years. Out of these patients, 28 (68.2% had congenital deafness of unknown cause. The commonest known cause was meningitis, found in 4 (9.7% patients, followed by use of ototoxic drugs and hereditary deafness. Etiological factors included: postnatal hypoxia, intracranial hemorrhage, pre term birth, cytomegalovirus infection during pregnancy, middle ear cholesteatoma, as well as sudden bilateral deafness. The time span between diagnosis of hearing loss and implantation was 34.6 months in 2002 and only 10 months in 2007. Results. 6 (13% patients presented with complications. There were 4 major, and two minor complications. The following complications were noted: ossified cochlea which required reoperation, unsuccessful operation in a patient with Down syndrome, facial tics, temporary facial weakness and ataxia. Five out of six complications were successfully resolved. Conclusion. New, more

  5. Language understanding and vocabulary of early cochlear implanted children

    DEFF Research Database (Denmark)

    Percy-Smith, Lone; Busch, Georg Walter; Sandahl, Minna;

    2013-01-01

    The aim of the study was to identify factors associated with the level of language understanding, the level of receptive and active vocabulary, and to estimate effect-related odds ratios for cochlear implanted children's language level....

  6. [Advances in the study of virtual channels of cochlear implant].

    Science.gov (United States)

    Zhu, Ziyan; Guan, Tian; Ye, Datian

    2009-12-01

    This paper discusses virtual channels of cochlear implant, which is produced by simultaneous or sequential activation of adjacent cochlear implant electrodes. Virtual channels create and transfer more available spectral pitch information with the limited number of fixed electrodes, which can be recognized as pitch percepts intermediate to those produced by each electrode separately. This technique not only utilizes the interaction of electrodes but also increases the number of place-pitch steps available to cochlear implant listeners. Virtual channels could be used to realize speech recognition in noisy environment, in enjoying music, and in understanding Chinese language. The study of virtual channels would significantly enhance the traditional cochlear implant therapy and benefit people suffering severe to profound hearing loss.

  7. Cortical Auditory Evoked Potentials in Unsuccessful Cochlear Implant Users

    Science.gov (United States)

    Munivrana, Boska; Mildner, Vesna

    2013-01-01

    In some cochlear implant users, success is not achieved in spite of optimal clinical factors (including age at implantation, duration of rehabilitation and post-implant hearing level), which may be attributed to disorders at higher levels of the auditory pathway. We used cortical auditory evoked potentials to investigate the ability to perceive…

  8. Phonological systems of pediatric cochlear implant users: The acquisition of voicing

    Science.gov (United States)

    Chin, Steven B.; Oglesbee, Eric N.; Kirk, Andrew K.; Krug, Joseph E.

    2005-04-01

    Although cochlear implants are primarily auditory prostheses, they have also demonstrated their usefulness as aids to speech production and the acquisition of spoken language in children. This presentation reports on research currently being conducted at the Indiana University Medical Center on the development of phonological systems by children with five or more years of cochlear implant use in English-speaking environments. Characteristics of the feature [voice] will be examined in children with cochlear implants and in two comparison groups: adults with normal hearing and children with normal hearing. Specific aspects of voicing to be discussed include characteristic error patterns, phonetic implementation of the voicing contrast, and phonetic implementation of neutralization of the voicing contrast. Much of the evidence obtained thus far indicates that voicing acquisition in children with cochlear implants is not radically different from that of children with normal hearing. Many differences between the systems of children with cochlear implants and the ambient system thus appear to reflect the children's age as much as their hearing status. [Work supported by grants from the National Institutes of Health to Indiana University: R01DC005594 and R03DC003852.

  9. Abnormal pitch perception produced by cochlear implant stimulation.

    Directory of Open Access Journals (Sweden)

    Fan-Gang Zeng

    Full Text Available Contemporary cochlear implants with multiple electrode stimulation can produce good speech perception but poor music perception. Hindered by the lack of a gold standard to quantify electric pitch, relatively little is known about the nature and extent of the electric pitch abnormalities and their impact on cochlear implant performance. Here we overcame this obstacle by comparing acoustic and electric pitch perception in 3 unilateral cochlear-implant subjects who had functionally usable acoustic hearing throughout the audiometric frequency range in the non-implant ear. First, to establish a baseline, we measured and found slightly impaired pure tone frequency discrimination and nearly perfect melody recognition in all 3 subjects' acoustic ear. Second, using pure tones in the acoustic ear to match electric pitch induced by an intra-cochlear electrode, we found that the frequency-electrode function was not only 1-2 octaves lower, but also 2 times more compressed in frequency range than the normal cochlear frequency-place function. Third, we derived frequency difference limens in electric pitch and found that the equivalent electric frequency discrimination was 24 times worse than normal-hearing controls. These 3 abnormalities are likely a result of a combination of broad electric field, distant intra-cochlear electrode placement, and non-uniform spiral ganglion cell distribution and survival, all of which are inherent to the electrode-nerve interface in contemporary cochlear implants. Previous studies emphasized on the "mean" shape of the frequency-electrode function, but the present study indicates that the large "variance" of this function, reflecting poor electric pitch discriminability, is the main factor limiting contemporary cochlear implant performance.

  10. Auditory pathway functioning in prelingual deafness : The clinical consequences for cochlear implantation

    NARCIS (Netherlands)

    Lammers, M.J.W.

    2015-01-01

    Cochlear implantation has proven itself as a very successful treatment for both children and adults with severe to profound hearing loss. Although most patients obtain a high level of speech perception, performance is more variable in prelingually deaf patients, i.e., patients with an onset of sever

  11. The effect of cochlear implantation on tinnitus in patients with bilateral hearing loss : A systematic review

    NARCIS (Netherlands)

    Ramakers, Geerte G J; van Zon, Alice; Stegeman, Inge; Grolman, Wilko

    2015-01-01

    OBJECTIVES: To present an overview of the effect of cochlear implantation on tinnitus in adults with bilateral sensorineural hearing loss. DATA SOURCES: PubMed, Cochrane Library, CINAHL, and Embase databases were searched for articles from database inception up to January 13, 2015. METHODS: A system

  12. 成年人工耳蜗植入者对音乐音色感知的特点与分析%The Musical Timbral Perception in Adult Cochlear Implant Users

    Institute of Scientific and Technical Information of China (English)

    古鑫; 刘博; 刘子夜; 亓贝尔; 董瑞娟; 王硕

    2016-01-01

    目的:评价语后聋成年人工耳蜗植入者对音乐音色的识别能力,探讨人工耳蜗植入者与听力正常者在音乐音色感知中的差异及可能的机制。方法实验组为人工耳蜗植入时间≥0.5年的成年语后聋患者30例,对照组为30例听力正常成人。使用人工耳蜗音乐评估软件(M u .S .I .C )对两组受试者进行不同音色(包括来自不同乐器家族且具有代表性的六种乐器以及男高音、女高音)识别能力的测试,记录并比较两组的识别正确率。结果①实验组音色识别正确率49.23%±18.93%,对照组90.23%±12.28%,后者高于前者( P<0.001);实验组识别正确率:男高音(76.7%)最高、钢琴(73.3%)次之,吉他(23.3%)最低。②实验组对每种音色的错选率均高于对照组,且选择更为分散,其中将吉他误选为钢琴的错选率最高(66.7%);其次为长笛错选为小号(33.3%)。结论人工耳蜗植入者对音乐音色的识别能力低于听力正常者,并且容易造成弦乐器之间、管乐器之间的混淆。%Objective To evaluate the timbral recognition ability of postlingually -deafened adult cochlear im‐plant users and to analyze the differences between cochlear implant users and normal hearing subjects and the possi‐ble mechanisms .Methods The experimental group (30 postlingually -deafened adult recipients with a cochlear im‐plant over 6 months) and the control group (30 normal hearing subjects) participated in this study .We used the timbre recognition test in Musical Sounds in Cochlear Implant (Mu .S .I .C) test battery consisting of tenor ,soprano and 6 representative musical instruments from different instrument families ,to obtain the correct rate of recogni‐tion .Results The correct rate of timbre recognition of experimental group was 49 .23 ± 18 .93% ,while it was 90 .23 ± 12 .28% in the control group(P<0

  13. Cochlear Implantation, Enhancements, Transhumanism and Posthumanism: Some Human Questions.

    Science.gov (United States)

    Lee, Joseph

    2016-02-01

    Biomedical engineering technologies such as brain-machine interfaces and neuroprosthetics are advancements which assist human beings in varied ways. There are exciting yet speculative visions of how the neurosciences and bioengineering may influence human nature. However, these could be preparing a possible pathway towards an enhanced and even posthuman future. This article seeks to investigate several ethical themes and wider questions of enhancement, transhumanism and posthumanism. Four themes of interest are: autonomy, identity, futures, and community. Three larger questions can be asked: will everyone be enhanced? Will we be "human" if we are not, one day, transhuman? Should we be enhanced or not? The article proceeds by concentrating on a widespread and sometimes controversial application: the cochlear implant, an auditory prosthesis implanted into Deaf patients. Cochlear implantation and its reception in both the deaf and hearing communities have a distinctive moral discourse, which can offer surprising insights. The paper begins with several points about the enhancement of human beings, transhumanism's reach beyond the human, and posthuman aspirations. Next it focuses on cochlear implants on two sides. Firstly, a shorter consideration of what technologies may do to humans in a transhumanist world. Secondly, a deeper analysis of cochlear implantation's unique socio-political movement, its ethical explanations and cultural experiences linked with pediatric cochlear implantation-and how those wary of being thrust towards posthumanism could marshal such ideas by analogy. As transhumanism approaches, the issues and questions merit continuing intense analysis.

  14. Single and multiple microphone noise reduction strategies in cochlear implants.

    Science.gov (United States)

    Kokkinakis, Kostas; Azimi, Behnam; Hu, Yi; Friedland, David R

    2012-06-01

    To restore hearing sensation, cochlear implants deliver electrical pulses to the auditory nerve by relying on sophisticated signal processing algorithms that convert acoustic inputs to electrical stimuli. Although individuals fitted with cochlear implants perform well in quiet, in the presence of background noise, the speech intelligibility of cochlear implant listeners is more susceptible to background noise than that of normal hearing listeners. Traditionally, to increase performance in noise, single-microphone noise reduction strategies have been used. More recently, a number of approaches have suggested that speech intelligibility in noise can be improved further by making use of two or more microphones, instead. Processing strategies based on multiple microphones can better exploit the spatial diversity of speech and noise because such strategies rely mostly on spatial information about the relative position of competing sound sources. In this article, we identify and elucidate the most significant theoretical aspects that underpin single- and multi-microphone noise reduction strategies for cochlear implants. More analytically, we focus on strategies of both types that have been shown to be promising for use in current-generation implant devices. We present data from past and more recent studies, and furthermore we outline the direction that future research in the area of noise reduction for cochlear implants could follow.

  15. Effect of unilateral and simultaneous bilateral cochlear implantation on tinnitus : A randomized controlled trial

    NARCIS (Netherlands)

    van Zon, Alice; Smulders, Yvette E; Ramakers, Geerte G J; Stegeman, Inge; Smit, Adriana L; Van Zanten, Gijsbert A; Stokroos, Robert J; Hendrice, Nadia; Free, Rolien H; Maat, Bert; Frijns, Johan H M; Mylanus, Emmanuel A M; Huinck, Wendy J; Topsakal, Vedat; Tange, Rinze A; Grolman, Wilko

    2015-01-01

    OBJECTIVES/HYPOTHESIS: To determine the effect of cochlear implantation on tinnitus perception in patients with severe bilateral postlingual sensorineural hearing loss and to demonstrate possible differences between unilateral and bilateral cochlear implantation. STUDY DESIGN: Prospective study. MET

  16. Effect of unilateral and simultaneous bilateral cochlear implantation on tinnitus: A Prospective Study

    NARCIS (Netherlands)

    Zon, A. van; Smulders, Y.E.; Ramakers, G.G.; Stegeman, I.; Smit, A.L.; Zanten, G.A.; Stokroos, R.J.; Hendrice, N.; Free, R.H.; Maat, B.; Frijns, J.H.; Mylanus, E.A.M.; Huinck, W.J.; Topsakal, V.; Tange, R.A.; Grolman, W.

    2016-01-01

    OBJECTIVES/HYPOTHESIS: To determine the effect of cochlear implantation on tinnitus perception in patients with severe bilateral postlingual sensorineural hearing loss and to demonstrate possible differences between unilateral and bilateral cochlear implantation. STUDY DESIGN: Prospective study. MET

  17. SUPPRESSION OF TINNITUS IN PATIENTS UNDERGOING COCHLEAR IMPLANTATION

    Directory of Open Access Journals (Sweden)

    M. T. Khorsandi

    1999-07-01

    Full Text Available 7 'innitus is a frequent complaint in patients with sensorineural deafness. Different reports suggest that electrical stimulation caused by cochlear implant devices "upn"ises tinnitus to a considerable degree. In a longitudinal -.mdv we have evaluated the severity and duration of tinnitus in both ears of J 7 cochlear implant patients before and after operation. Severity of tinnitus was reduced in both implanted and not implanted ears after the implantation (P=0.003 and p - 0.00-1 respectively. Duration of tinnitus, however, was not affected significantly. No significant difference in tinnitus suppression was observed between the implanted and not implanted ears. This might be attributed to both the electrical stimulation caused by the device and the psychogenic stability provided by return to the world of sound.

  18. Cochlear implant challenges encountered in tuberculous otitis media

    Institute of Scientific and Technical Information of China (English)

    Cheng-Fang Chen; Zhao-Hui Liu; Jing Xie; Xiao-Bo Ma; Yi Li; Shu-Sheng Gong

    2012-01-01

    ABSTRACT Tuberculous otitis media (TOM) is rare inENT department, and is frequently misdiagnosed as otitis media. Thus early systemic treatment is very important forTOM. We reported a case report withTOM to highlight development of the disease and difficulties in clinical treatment in late stage ofTOM. Implantation of ossified and eroded cochlea poses many unique challenges to both the surgeon and programming team. With thorough preparation and complete knowledge about characters of specific issues, implantation would be performed successfully, and patients with ossified cochlear could benefit from cochlear implantation.

  19. Motor Development of Deaf Children with and without Cochlear Implants

    Science.gov (United States)

    Gheysen, Freja; Loots, Gerrit; Van Waelvelde, Hilde

    2008-01-01

    The purpose of this study was to investigate the impact of a cochlear implant (CI) on the motor development of deaf children. The study involved 36 mainstreamed deaf children (15 boys, 21 girls; 4- to 12-years old) without any developmental problems. Of these children, 20 had been implanted. Forty-three hearing children constituted a comparison…

  20. Simultaneous Communication and Cochlear Implants in the Classroom?

    Science.gov (United States)

    Blom, Helen C.; Marschark, Marc

    2015-01-01

    This study was designed to evaluate the potential of simultaneous communication (sign and speech together) to support classroom learning by college students who use cochlear implants (CIs). Metacognitive awareness of learning also was evaluated. A within-subjects design involving 40 implant users indicated that the student participants learned…

  1. The acquisition of personal pronouns in cochlear-implanted children

    NARCIS (Netherlands)

    Verbist, Annemie Josee Jozef

    2010-01-01

    Today, many deaf children can be given access to oral language thanks to a cochlear implant, a surgically implanted electronic device that provides a sense of sound thanks to electric stimulation of the auditory nerve. In this study, the acquisition of personal pronouns is considered to be a measure

  2. Temporal feature perception in cochlear implant users.

    Directory of Open Access Journals (Sweden)

    Lydia Timm

    Full Text Available For the perception of timbre of a musical instrument, the attack time is known to hold crucial information. The first 50 to 150 ms of sound onset reflect the excitation mechanism, which generates the sound. Since auditory processing and music perception in particular are known to be hampered in cochlear implant (CI users, we conducted an electroencephalography (EEG study with an oddball paradigm to evaluate the processing of small differences in musical sound onset. The first 60 ms of a cornet sound were manipulated in order to examine whether these differences are detected by CI users and normal-hearing controls (NH controls, as revealed by auditory evoked potentials (AEPs. Our analysis focused on the N1 as an exogenous component known to reflect physical stimuli properties as well as on the P2 and the Mismatch Negativity (MMN. Our results revealed different N1 latencies as well as P2 amplitudes and latencies for the onset manipulations in both groups. An MMN could be elicited only in the NH control group. Together with additional findings that suggest an impact of musical training on CI users' AEPs, our findings support the view that impaired timbre perception in CI users is at partly due to altered sound onset feature detection.

  3. New Criteria of Indication and Selection of Patients to Cochlear Implant

    Directory of Open Access Journals (Sweden)

    André L. L. Sampaio

    2011-01-01

    Full Text Available Numerous changes continue to occur in cochlear implant candidacy. In general, these have been accompanied by concomitant and satisfactory changes in surgical techniques. Together, this has advanced the utility and safety of cochlear implantation. Most devices are now approved for use in patients with severe to profound unilateral hearing loss rather then the prior requirement of a bilateral profound loss. Furthermore, studies have begun utilizing short electrode arrays for shallow insertion in patients with considerable low-frequency residual hearing. This technique will allow the recipient to continue to use acoustically amplified hearing for the low frequencies simultaneously with a cochlear implant for the high frequencies. The advances in design of, and indications for, cochlear implants have been matched by improvements in surgical techniques and decrease in complications. The resulting improvements in safety and efficacy have further encouraged the use of these devices. This paper will review the new concepts in the candidacy of cochlear implant. Medline data base was used to search articles dealing with the following topics: cochlear implant in younger children, cochlear implant and hearing preservation, cochlear implant for unilateral deafness and tinnitus, genetic hearing loss and cochlear implant, bilateral cochlear implant, neuropathy and cochlear implant and neural plasticity, and the selection of patients for cochlear implant.

  4. Hearing Experience and Receptive Vocabulary Development in Deaf Children with Cochlear Implants

    Science.gov (United States)

    Fagan, Mary K.; Pisoni, David B.

    2010-01-01

    This study investigated receptive vocabulary delay in deaf children with cochlear implants. Participants were 23 children with profound hearing loss, ages 6-14 years, who received a cochlear implant between ages 1.4 and 6 years. Duration of cochlear implant use ranged from 3.7 to 11.8 years. "Peabody Picture Vocabulary Test, Third…

  5. A Longitudinal Study in Children with Sequential Bilateral Cochlear Implants: Time Course for the Second Implanted Ear and Bilateral Performance

    Science.gov (United States)

    Reeder, Ruth M.; Firszt, Jill B.; Cadieux, Jamie H.; Strube, Michael J.

    2017-01-01

    Purpose: Whether, and if so when, a second-ear cochlear implant should be provided to older, unilaterally implanted children is an ongoing clinical question. This study evaluated rate of speech recognition progress for the second implanted ear and with bilateral cochlear implants in older sequentially implanted children and evaluated localization…

  6. Cochlear implant electrode array misplaced in Hyrtl's fissure.

    Science.gov (United States)

    Mouzali, Amina; Ouennoughi, Kheiredidine; Haraoubia, Mohamed-Salah; Zemirli, Omar; Triglia, Jean Michel

    2011-11-01

    Hyrtl's fissure is a cleft that is present in the developing fetal petrous temporal bone and extends from the area inferior to the round window to the meninges of the posterior fossa. Persistent Hyrtl's fissure, due to incomplete ossification, is considered a rare temporal bone malformation, and is a known cause of perilabyrinthine cerebrospinal fluid fistula. Very few cases are reported as being at risk of complication of cochlear implant surgery. Here we report the case of an 8-year-old boy with misplacement of an electrode array in Hyrtl's fissure. The diagnosis was made postoperatively, since cochlear implant failure was suspected from non-auditory responses. Computed tomography (CT) revealed the extracochlear location of the electrode array. We emphasize the role of presurgical imaging CT and magnetic resonance imaging in detecting temporal bone abnormalities, and we discuss the value of intraoperative auditory nerve response telemetry and postoperative radiological evaluation in diagnosing cochlear implant misplacement.

  7. A preliminary study looking at parental emotions following cochlear implantation.

    Science.gov (United States)

    Anagnostou, Flora; Graham, John; Crocker, Susan

    2007-06-01

    This preliminary research investigated the emotions of parents with cochlear implanted children. The object for the research was first to compare four emotions engendered in parents of deaf children before and after cochlear implantation. Second, to monitor changes in these emotions during a period of up to four years after implantation. Third, to see whether any of the emotions studied was significantly more prominent than the others, and fifth to identify any differences in emotions that were related to the gender of parents. A self-report questionnaire was given to 112 participants of whom 53 replied. There were equal groups of parents in two categories, those with children up to two years after implantation, and those two to four years after implantation. The responses were interpreted using parametric statistics. The results highlight that grief is the strongest emotional condition that parents experience before and up to two years after implantation, alongside family adjustments. Parents of the up to two years after implantation group generally have stronger feelings and are less satisfied than parents in the over two years implanted group. Finally, fathers use denial more than mothers. Considerations for future research and implications for paediatric cochlear implant teams will be discussed.

  8. Factors contributing to communication skills development in cochlear implanted children

    Directory of Open Access Journals (Sweden)

    Ostojić Sanja

    2015-01-01

    Full Text Available Background/Aim. Over the last 10 years more than 300 persons received cochlear implant in Serbia and more than 90% of the recipients were children under 10 years of age. The program of cochlear implantation includes postoperative rehabilitation in which cognitive, integrative and developmental methods are used. The study was conducted to reveal factors affecting communication performance (CP of cochlear implanted (CI children. Special attention was focused on the influence of the duration and intensity of rehabilitation and hearing age on further development of communication skills. Methods. A group of 30 CI children (13 boys and 17 girls aged 2 to 5 years was enrolled in the study. All of the children had average intelligence and no other developmental disorder. They lived in families and attended rehabilitative seances 3 to 5 times a week. Their parents/ caregivers answered structured questionnaire about functioning after pediatric cochlear implantation (FAPCI and the results were the subject of detailed statistical analysis. Results. Analysis of variance did not show any difference between the boys and the girls regarding FAPCI achievements (F (1, 28 = 2.909; p = 0.099 and age aberration in CP score (F (1, 28 = 0.114, p = 0.738. Correlation analysis showed a statistically significant difference in FAPCI scores related to hearing age and duration of rehabilitation. Regression analysis (enter method showed that model consisting of indipendent variables significantly contributed to prediction of overall FAPCI scores and Adjusted R2 value could explain 32% difference in communication skills of participants in this study. Conclusion. Communication skills of CI children evaluated by FAPCI are falling behind normatives for normal hearing children 18.6 months on the average. Hearing age, duration and intensity of rehabilitation have positive predictive value for communication skills development. Later identification of hearing loss and later cochlear

  9. Analysis of Speech Processing Strategies in Cochlear Implants

    Directory of Open Access Journals (Sweden)

    Kouachi Rouiha

    2008-01-01

    Full Text Available Cochlear implants can restore partial hearing to profoundly deaf people; the main function of these prostheses is to electrically stimulate the auditory nerve using an electrode array inserted in the cochlea. The acoustic signal is picked up by a microphone and analyzed. Then the extracted parameters of the signal are coded to generate electrical signals reconstituting the original signal. Currently all commercialized implants are multichannel they allow to stimulate the auditory nerve at different place of the cochlea, exploiting the tonotopic coding of the frequencies. This research will present an overview of various signal processing techniques that have been used for cochlear prosthesis over the years.

  10. Staphylococcus lugdunensis: novel organism causing cochlear implant infection

    Directory of Open Access Journals (Sweden)

    Samina Bhumbra

    2014-06-01

    Full Text Available A majority of cochlear implant infections are caused by Staphylococcus aureus or Pseudomonas aeruginosa. Reported here is a pediatric patient with a cochlear implant infection caused by methicillin-resistant Staphylococcus lugdunensis, a coagulase-negative Staphylococcus that has only recently been determined to be clinically relevant (1988. Unlike other coagulase-negative Staphylococcus, it is more aggressive, carrying a greater potential for tissue destruction. In pediatrics, the organism is uncommon, poorly described, and generally pan-susceptible. Described herein is the presentation and management of this unusual organism in a pediatric setting.

  11. Different Perception of Musical Stimuli in Patients with Monolateral and Bilateral Cochlear Implants

    Directory of Open Access Journals (Sweden)

    Anton Giulio Maglione

    2014-01-01

    Full Text Available The aim of the present study is to measure the perceived pleasantness during the observation of a musical video clip in a group of cochlear implanted adult patients when compared to a group of normal hearing subjects. This comparison was performed by using the imbalance of the EEG power spectra in alpha band over frontal areas as a metric for the perceived pleasantness. Subjects were asked to watch a musical video clip in three different experimental conditions: with the original audio included (Norm, with a distorted version of the audio (Dist, and without the audio (Mute. The frontal EEG imbalance between the estimated power spectra for the left and right prefrontal areas has been calculated to investigate the differences among the two populations. Results suggested that the perceived pleasantness of the musical video clip in the normal hearing population and in the bilateral cochlear implanted populations has similar range of variation across the different stimulations (Norm, Dist, and Mute, when compared to the range of variation of video clip’s pleasantness for the monolateral cochlear implanted population. A similarity exists in the trends of the perceived pleasantness across the different experimental conditions in the mono- and bilaterally cochlear implanted patients.

  12. 成人语后聋患者人工耳蜗植入术后初期状态分析%Analysis on the initial state of postlingual deafness in adult patients after cochlear implantation

    Institute of Scientific and Technical Information of China (English)

    李海珍; 郑秀瑾; 孙雪萍; 张文露

    2014-01-01

    目的:总结成人语后聋患者人工耳蜗植入术后的声音察觉及言语感知,探讨成人重获听力的期望值,是否需要进行听力训练及适应交往时间。方法选取2002-2011年成人语后聋人工耳蜗植入术后患者16例,其中9例患者开机即参与训练,1例开机后3个月内在自然环境等待自然康复,无效果而来训练,6例患者一直未参与训练。参与训练者起始在自然的环境中给予乐音、语音不同频率声音的输入测试听力,听力训练每日2 h,单训及合训结合。以听觉言语感知、书写及言语表达等多种综合沟通形式并用,进行为期3~10周的听觉培建。从听觉培建后期开始增加言语训练,注重口语朗读的连贯性及清晰度,考察音义结合及回归适应社会的效果。结果参与训练的10例中,4例耳蜗植入术后开机即刻训练达5周以上,1例间断训练4周,5例短暂(最短3~4 d)训练。6例不参与训练。参与训练大于4周的5例患者《最低听觉功能测试词表》测试总辨别率平均为90.3%,5~7个月逐步适应工作及学习环境,1.5~2.0年可正常交流;短期训练的5例中经《最低听觉功能测试词表》测试3例总辨别率平均为36.0%;2例不能完成测试;未参与训练的6例患者平均术后2年均不能完成测试。结论人工耳蜗植入使语后聋成人获得了重获听力的基础,术后训练使患者重获听力成为现实,训练时间短于语前聋小儿,但仍需到达一定时间。%Objective To analysis the re-hearing expectations and the need for auditory training and the time of adaptation exchanges after cochlear implantation .Methods Sixteen cases of adult postlingual deafness, which were selected, from 2002 to 2011, were treated by cochlear implantation .9 cases participated in speech training right after cochlear implantation , and 7 cases didn ’ t participate in speech training

  13. Pre-, intra- and post-operative imaging of cochlear implants

    Energy Technology Data Exchange (ETDEWEB)

    Vogl, T.J.; Naguib, N.N.N.; Burck, I. [University Hospital Frankfurt (Germany). Inst. of Diagnostic and Interventional Radiology; Tawfik, A. [Mansoura Univ. (Egypt). Dept. of Diagnostic and Interventional Radiology; Emam, A. [University Hospital Alexandria (Egypt). Dept. of Diagnostic and Interventional Radiology; Nour-Eldin, A. [University Hospital Cairo (Egypt). Dept. of Radiology; Stoever, T. [University Hospital of Frankfurt (Germany). Dept. of Otolaryngology

    2015-11-15

    The purpose of this review is to present essential imaging aspects in patients who are candidates for a possible cochlear implant as well as in postsurgical follow-up. Imaging plays a major role in providing information on preinterventional topography, variations and possible infections. Preoperative imaging using DVT, CT, MRI or CT and MRI together is essential for candidate selection, planning of surgical approach and exclusion of contraindications like the complete absence of the cochlea or cochlear nerve, or infection. Relative contraindications are variations of the cochlea and vestibulum. Intraoperative imaging can be performed by fluoroscopy, mobile radiography or DVT. Postoperative imaging is regularly performed by conventional X-ray, DVT, or CT. In summary, radiological imaging has its essential role in the pre- and post-interventional period for patients who are candidates for cochlear implants.

  14. A speech processing study using an acoustic model of a multiple-channel cochlear implant

    Science.gov (United States)

    Xu, Ying

    1998-10-01

    A cochlear implant is an electronic device designed to provide sound information for adults and children who have bilateral profound hearing loss. The task of representing speech signals as electrical stimuli is central to the design and performance of cochlear implants. Studies have shown that the current speech- processing strategies provide significant benefits to cochlear implant users. However, the evaluation and development of speech-processing strategies have been complicated by hardware limitations and large variability in user performance. To alleviate these problems, an acoustic model of a cochlear implant with the SPEAK strategy is implemented in this study, in which a set of acoustic stimuli whose psychophysical characteristics are as close as possible to those produced by a cochlear implant are presented on normal-hearing subjects. To test the effectiveness and feasibility of this acoustic model, a psychophysical experiment was conducted to match the performance of a normal-hearing listener using model- processed signals to that of a cochlear implant user. Good agreement was found between an implanted patient and an age-matched normal-hearing subject in a dynamic signal discrimination experiment, indicating that this acoustic model is a reasonably good approximation of a cochlear implant with the SPEAK strategy. The acoustic model was then used to examine the potential of the SPEAK strategy in terms of its temporal and frequency encoding of speech. It was hypothesized that better temporal and frequency encoding of speech can be accomplished by higher stimulation rates and a larger number of activated channels. Vowel and consonant recognition tests were conducted on normal-hearing subjects using speech tokens processed by the acoustic model, with different combinations of stimulation rate and number of activated channels. The results showed that vowel recognition was best at 600 pps and 8 activated channels, but further increases in stimulation rate and

  15. Bilateral cochlear implantation: current concepts, indications, and results.

    Science.gov (United States)

    Basura, Gregory J; Eapen, Rose; Buchman, Craig A

    2009-12-01

    The optimal treatment for bilateral hearing loss continues to evolve as cochlear implant (CI) and hearing aid technologies advance, as does our understanding of the central auditory system. Ongoing discussions continue on the validity and feasibility of bilateral CI in terms of performance, justification of need, medical/surgical safety concerns, and economics. The purpose of this review article is to provide an update on the advantages and disadvantages of bilateral CI and to provide a discussion on timing (simultaneous vs. sequential), technology (bimodal vs. binaural) and feasibility. Binaural advantages are found in both adult and pediatric bilateral CI recipients, the greatest being the head shadow effect and improvements in localization and loudness summation. This theoretically offers an advantage over their unilateral implanted counterparts in terms of improved sound localization and enhanced speech perception under noisy conditions. Most investigators agree that bilateral stimulation during critical periods of development is paramount for optimizing auditory functioning in children. Currently, bilateral CI is widely accepted as a safe and effective means of bilateral auditory stimulation.

  16. Theory of mind and language in children with cochlear implants.

    Science.gov (United States)

    Remmel, Ethan; Peters, Kimberly

    2009-01-01

    Thirty children with cochlear implants (CI children), age range 3-12 years, and 30 children with normal hearing (NH children), age range 4-6 years, were tested on theory of mind and language measures. The CI children showed little to no delay on either theory of mind, relative to the NH children, or spoken language, relative to hearing norms. The CI children showed a slightly atypical sequence of acquisition of theory of mind concepts. The CI children's theory of mind performance was associated with general syntactic proficiency more than measures of complement syntax, and with time since implantation more than age at implantation. Results suggest that cochlear implantation can benefit spoken language ability, which may then benefit theory of mind, perhaps by increasing access to mental state language.

  17. Theory of Mind and Language in Children with Cochlear Implants

    Science.gov (United States)

    Remmel, Ethan; Peters, Kimberly

    2009-01-01

    Thirty children with cochlear implants (CI children), age range 3-12 years, and 30 children with normal hearing (NH children), age range 4-6 years, were tested on theory of mind and language measures. The CI children showed little to no delay on either theory of mind, relative to the NH children, or spoken language, relative to hearing norms. The…

  18. Predictors of Spoken Language Development Following Pediatric Cochlear Implantation

    NARCIS (Netherlands)

    Boons, Tinne; Brokx, Jan; Dhooge, Ingeborg; Frijns, Johan; Peeraer, Louis; Vermeulen,; Wouters,; Wieringen, van

    2012-01-01

    Objectives: Although deaf children with cochlear implants (CIs) are able to develop good language skills, the large variability in outcomes remains a significant concern. The first aim of this study was to evaluate language skills in children with CIs to establish benchmarks. The second aim was to m

  19. Mismatch Negativity Based Neurofeedback for Cochlear Implant Users

    NARCIS (Netherlands)

    Luckmann, Annika; Başkent, Deniz; Jolij, Jacob

    2015-01-01

    Cochlear implant (CI) users experience great difficulty when it comes to pitch discrimination. This leads to problems during daily interactions, due to poor speech perception, but also a very low pleasure ratings for music. Improving pitch perception and discrimination in CI users would improve thei

  20. Use of Computed Tomography Scans for Cochlear Implants

    OpenAIRE

    Whiting, Bruce R.; Holden, Timothy A.; Brunsden, Barry S.; Finley, Charles C.; Skinner, Margaret W.

    2007-01-01

    While 3-dimensional (3D) imaging by computed tomography has long been desirable for research and treatment of cochlear-implant patients, technical challenges have limited its wide application. Recent developments in scanner hardware and image processing techniques now allow image quality improvements that make clinical applications feasible. Validation experiments were performed to characterize a new methodology and its imaging performance.

  1. Multicenter study with a direct acoustic cochlear implant

    NARCIS (Netherlands)

    Lenarz, T.; Zwartenkot, J.W.; Stieger, C.; Schwab, B.; Mylanus, E.A.M.; Caversaccio, M.; Kompis, M.; Snik, A.F.M.; D'Hondt, C.; Mojallal, H.

    2013-01-01

    OBJECTIVE: To confirm the clinical efficacy and safety of a direct acoustic cochlear implant. STUDY DESIGN: Prospective multicenter study. SETTING: The study was performed at 3 university hospitals in Europe (Germany, The Netherlands, and Switzerland). PATIENTS: Fifteen patients with severe-to-profo

  2. Two new directions in speech processor design for cochlear implants.

    Science.gov (United States)

    Wilson, Blake S; Schatzer, Reinhold; Lopez-Poveda, Enrique A; Sun, Xiaoan; Lawson, Dewey T; Wolford, Robert D

    2005-08-01

    Two new approaches to the design of speech processors for cochlear implants are described. The first aims to represent "fine structure" or "fine frequency" information in a way that it can be perceived and used by patients, and the second aims to provide a closer mimicking than was previously possible of the signal processing that occurs in the normal cochlea.

  3. Communication Intervention for Children with Cochlear Implants: Two Case Studies.

    Science.gov (United States)

    Ertmer, David J.; Leonard, Jeannette S.; Pachuilo, Michael L.

    2002-01-01

    This article describes the intervention programs attended and progress made by two children (ages 3 and 7) who exhibited considerable differences in benefit from their cochlear implants. Their intervention programs employed both analytical and synthetic auditory training and emphasized the development of speech production and language skills.…

  4. Acoustic and Semantic Enhancements for Children with Cochlear Implants

    Science.gov (United States)

    Smiljanic, Rajka; Sladen, Douglas

    2013-01-01

    Purpose: In this study, the authors examined how signal clarity interacts with the use of sentence context information in determining speech-in-noise recognition for children with cochlear implants and children with normal hearing. Method: One hundred and twenty sentences in which the final word varied in predictability (high vs. low semantic…

  5. Single Word and Sentence Intelligibility in Children with Cochlear Implants

    Science.gov (United States)

    Khwaileh, Fadwa A.; Flipsen, Peter, Jr.

    2010-01-01

    This study examined the intelligibility of speech produced by 17 children (aged 4-11 years) with cochlear implants. Stimulus items included sentences from the Beginners' Intelligibility Test (BIT) and words from the Children Speech Intelligibility Measure (CSIM). Naive listeners responded by writing sentences heard or with two types of responses…

  6. Cochlear Implants in the Inclusive Classroom: A Case Study

    Science.gov (United States)

    Jachova, Zora; Kovacevic, Jasmina

    2010-01-01

    This article presents a case study of a child aged 12 years with a cochlear implant who is attending a mainstream educational setting in Skopje, FYR Macedonia. The study, which uses both qualitative and quantitative data, took place over a period of 12 months. It illustrates the importance of professional development and training of teachers and a…

  7. Strategies for Working with Children with Cochlear Implants

    Science.gov (United States)

    Schraer-Joiner, Lyn; Prause-Weber, Manuela

    2009-01-01

    According to the National Institute on Deafness and Other Communication Disorders, 23,000 individuals in the United States, including 10,000 children, have a cochlear implant. This biomedical electronic device has been a breakthrough in the auditory rehabilitation of individuals diagnosed with severe or profound sensorineural hearing losses who…

  8. Spelling of Deaf Children Who Use Cochlear Implants

    Science.gov (United States)

    Hayes, Heather; Kessler, Brett; Treiman, Rebecca

    2011-01-01

    The spellings of 39 profoundly deaf users of cochlear implants, aged 6 to 12 years, were compared with those of 39 hearing peers. When controlled for age and reading ability, the error rates of the 2 groups were not significantly different. Both groups evinced phonological spelling strategies, performing better on words with more typical…

  9. Speech Perception in Noise by Children with Cochlear Implants

    Science.gov (United States)

    Caldwell, Amanda; Nittrouer, Susan

    2013-01-01

    Purpose: Common wisdom suggests that listening in noise poses disproportionately greater difficulty for listeners with cochlear implants (CIs) than for peers with normal hearing (NH). The purpose of this study was to examine phonological, language, and cognitive skills that might help explain speech-in-noise abilities for children with CIs.…

  10. Patients with Pendred syndrome: is cochlear implantation beneficial?

    NARCIS (Netherlands)

    Nierop, J.W.I. van; Huinck, W.J.; Pennings, R.J.E.; Admiraal, R.J.C.; Mylanus, E.A.M.; Kunst, H.P.M.

    2016-01-01

    OBJECTIVE: To evaluate the benefit of cochlear implantation in patients with Pendred syndrome. DESIGN: Retrospective study. SETTING: Tertiary centre. PARTICIPANTS AND MAIN OUTCOME MEASURES: Speech perception was measured using a phonetically balanced word list at a sound pressure level of 65 dB. Pos

  11. Classroom performance of children with cochlear implants in mainstream education.

    NARCIS (Netherlands)

    Damen, G.W.J.A.; Oever-Goltstein, M.H. van den; Langereis, M.C.; Chute, P.M.; Mylanus, E.A.M.

    2006-01-01

    OBJECTIVES: We compared classroom performance of children with a cochlear implant (CI) with that of their normal-hearing peers in mainstream education. METHODS: Thirty-two CI children in mainstream education, congenitally or prelingually deaf, participated in this study, as did 37 hearing classmates

  12. Concept Formation Skills in Long-Term Cochlear Implant Users

    Science.gov (United States)

    Castellanos, Irina; Kronenberger, William G.; Beer, Jessica; Colson, Bethany G.; Henning, Shirley C.; Ditmars, Allison; Pisoni, David B.

    2015-01-01

    This study investigated if a period of auditory sensory deprivation followed by degraded auditory input and related language delays affects visual concept formation skills in long-term prelingually deaf cochlear implant (CI) users. We also examined if concept formation skills are mediated or moderated by other neurocognitive domains (i.e.,…

  13. Perception of Suprasegmental Speech Features via Bimodal Stimulation: Cochlear Implant on One Ear and Hearing Aid on the Other

    Science.gov (United States)

    Most, Tova; Harel, Tamar; Shpak, Talma; Luntz, Michal

    2011-01-01

    Purpose: The purpose of the study was to evaluate the contribution of acoustic hearing to the perception of suprasegmental features by adults who use a cochlear implant (CI) and a hearing aid (HA) in opposite ears. Method: 23 adults participated in this study. Perception of suprasegmental features--intonation, syllable stress, and word…

  14. Communication outcomes following cochlear implantation in a child with cystic cochleovestibular anomaly

    Institute of Scientific and Technical Information of China (English)

    N. Banumathy; Naresh K. Panda

    2016-01-01

    Cochlear implantation is one of the best amongst the various management options available for children and adults with severe to profound sensorineural hearing loss. Inner ear and internal auditory canal (IAC) malformations accounts to approximately 25%of congenital sensorineural hearing loss in children. The primary goal of this report was to evaluate the communication outcomes after cochlear implantation in a child with cystic cochleovestibular anomaly (CCVA). The child was evaluated through various standardized outcome measures at regular intervals to track the progress in terms of auditory and spoken language skills. The scores on Categories of Auditory Perception (CAP), Meaningful Auditory Integration Scale (MAIS), Speech Intelligibility Rating (SIR), Meaningful Use of Speech Scale (MUSS), and listening and spoken language skills showed a significant leap in 12 months duration post implantation. The report thus highlights and correlates the significant progress in auditory and spoken language skills of the child with congenital malformations to appropriate auditory rehabilitation and intensive parental training.

  15. Examining Speech Sound Acquisition for Children with Cochlear Implants Using the GFTA-2

    Science.gov (United States)

    Flipsen, Peter, Jr.

    2011-01-01

    This study examines use of the Goldman-Fristoe Test of Articulation-Second Edition (GFTA-2) with children who use cochlear implants to evaluate whether or not it would be appropriate to use this test with this population. Participants included 15 children with cochlear implants who ranged in age of implantation and amount of implant experience.…

  16. Cochlear implant benefits in deafness rehabilitation: PET study of temporal voice Activations

    Energy Technology Data Exchange (ETDEWEB)

    Coez, A.; Zilbovicius, M. [CEA, Serv Hosp Frederic Joliot, INSERM, Res Unit Neuroimaging and Psychiat, U797, IFR49, F-91406 Orsay (France); Zilbovicius, M.; Syrota, A.; Samson, Y. [CEA, DSV, DRM, Serv Hosp Frederic Joliot, F-91406 Orsay (France); Bizaguet, E. [Lab Correct Audit, Paris (France); Coez, A. [Univ Paris Sud 11, Paris (France); Ferrary, E.; Bouccara, D.; Mosnier, I.; Sterkers, O. [INSERM, Unit M 867, Paris (France); Ambert-Dahan, E. [Hop Beaujon, Serv ORL Chirurg Cervicofaciale, AP-HP, Clichy (France); Ferrary, E.; Bouccara, D.; Mosnier, I.; Sterkers, O. [Inst Fed Rech Claude Bernard Physiol et Pathol, IFR02, Paris (France); Samson, Y. [Hop La Pitie Salpetriere, Serv Urgences Cerebro-vasc, AP-HP, Paris (France); Samson, Y. [Univ Paris 06, Paris (France); Sterkers, O. [Univ Denis Diderot Paris 7, Paris (France)

    2008-07-01

    Cochlear implants may improve the medical and social prognosis of profound deafness. Nevertheless, some patients have experienced poor results without any clear explanations. One correlate may be an alteration in cortical voice processing. To test this hypothesis, we studied the activation of human temporal voice areas (TVA) using a well-standardized PET paradigm adapted from previous functional MRI (fMRI) studies. Methods: A PET H{sub 2}{sup 15}O activation study was performed on 3 groups of adult volunteers: normal-hearing control subjects (n 6) and cochlear-implanted post-lingually deaf patients with {>=}2 y of cochlear implant experience, with intelligibility scores in the 'Lafon monosyllabic task' {>=}80% (Good group; n 6) or {<=}20% (Poor group; n 6). Relative cerebral blood flow was measured in 3 conditions: rest, passive listening to human voice, and non-voice stimuli. Results: Compared with silence, the activations induced by non-voice stimuli were bilaterally located in the superior temporal regions in all groups. However these activations were significantly and similarly reduced in both cochlear implant groups, whereas control subjects showed supplementary activations. Compared with non-voice, the voice stimuli induced bilateral activation of the TVA along the superior temporal sulcus (STS) in both the control and the Good groups. In contrast, these activations were not detected in the Poor group, which showed only left unilateral middle STS activation. Conclusion: These results suggest that PET is an adequate method to explore cochlear implant benefits and that this benefit could be linked to the activation of the TVA. (authors)

  17. Profile of cochlear implant users of the city of Manaus

    Science.gov (United States)

    Pedrett, Mariana dos Santos; Moreira, Sandra Costa

    2012-01-01

    Summary Introduction: The cochlear implant is a device that is intended to substitute for the function of cochlear hair cells, electrically stimulate auditory nerve fibers, and contribute to the perception of speech sounds. However, the surgical procedure alone is not enough for the user to achieve favorable results in habilitation/rehabilitation. Objective: To characterize the patients from Manaus who have received cochlear implants based on the criteria for surgery. Methods: We conducted a retrospective cross-sectional study of 15 cases and recorded etiological aspects of deafness, age, gender, duration of implant use, use of hearing aids, and participation in individual therapy. Data were recorded in a protocol designed specifically for this purpose. All patients were natives of Manaus. Results: The leading etiological aspect was ototoxicity associated with prematurity in newborns undergoing treatment in the neonatal intensive care unit. The age at surgery is carefully observed in the evaluation of implant centers, as well as if the candidate is pre-or post-lingual. In this study, 73% of patients were pre-lingual and did not benefit from hearing aids. As to the degree and type of hearing loss, 93% had audiological reports indicating profound bilateral sensorineural hearing loss and 7% had severe bilateral sensorineural hearing loss. This latter finding confirmed one of the basic principles of implant placement. Conclusion: This study allowed us to verify that there are reduced number of cochlear implant recipients in Manaus, but they have met the criteria required by implant centers located in other states of Brazil. PMID:25991973

  18. Profile of cochlear implant users of the city of Manaus

    Directory of Open Access Journals (Sweden)

    Pedrett, Mariana dos Santos

    2012-01-01

    Full Text Available Introduction: The cochlear implant is a device that is intended to substitute for the function of cochlear hair cells, electrically stimulate auditory nerve fibers, and contribute to the perception of speech sounds. However, the surgical procedure alone is not enough for the user to achieve favorable results in habilitation/rehabilitation. Objective: To characterize the patients from Manaus who have received cochlear implants based on the criteria for surgery. Methods: We conducted a retrospective cross-sectional study of 15 cases and recorded etiological aspects of deafness, age, gender, duration of implant use, use of hearing aids, and participation in individual therapy. Data were recorded in a protocol designed specifically for this purpose. All patients were natives of Manaus. Results: The leading etiological aspect was ototoxicity associated with prematurity in newborns undergoing treatment in the neonatal intensive care unit. The age at surgery is carefully observed in the evaluation of implant centers, as well as if the candidate is pre-or post-lingual. In this study, 73% of patients were pre-lingual and did not benefit from hearing aids. As to the degree and type of hearing loss, 93% had audiological reports indicating profound bilateral sensorineural hearing loss and 7% had severe bilateral sensorineural hearing loss. This latter finding confirmed one of the basic principles of implant placement. Conclusion: This study allowed us to verify that there are reduced number of cochlear implant recipients in Manaus, but they have met the criteria required by implant centers located in other states of Brazil.

  19. Prelingual deafness: Benefits from cochlear implants versus conventional hearing aids

    Science.gov (United States)

    Bittencourt, Aline Gomes; Torre, Ana Adelina Giantomassi Della; Bento, Ricardo Ferreira; Tsuji, Robinson Koji; Brito, Rubens de

    2012-01-01

    Summary Introduction: The majority of patients with hearing loss, including those with severe hearing loss, benefits from the use of hearing aids. The cochlear implant is believed to achieve better results in a child with hearing loss in cases where the severity of disability renders hearing aids incapable of providing adequate sound information, as they require sufficient cochlear reserve so that acoustic detention occurs. Objective: To assess if cochlear implants provide more benefit than conventional hearing aids in prelingually deaf patients. Summary of the findings: The study was a systematic review of scientific papers selected by a search of the SciELO, Cochrane, MEDLINE, and LILACS-BIREME databases. Among the 2169 articles found, 12 studies proved relevant to the issue and presented an evidence strength rating of B. No publications rated evidence strength A. Seven of the studies analyzed were prospective cohorts and 5 were cross-sectional studies. Conclusion: Based on several studies, cochlear implants were demonstrated to be the best current alternative for bilateral severe or profound hearing loss, achieving better results in speech perception and development in prelingual children when compared to conventional hearing aids. PMID:25991962

  20. Mandarin melody recognition by pediatric cochlear implant recipients.

    Science.gov (United States)

    Hsiao, Feilin

    2008-01-01

    This study investigated the ability of children with implants who speak Mandarin Chinese, a tonal language, to recognize familiar melodies. It further examined the relative contributions of pitch, rhythm, and lyrics to melody recognition. Two groups of participants (ages 7-15; n = 20 for each group), those with cochlear implants and those with typical hearing, listened to 2 sets (traditional Mandarin children's songs and children's songs from Western cultures translated into Mandarin) of three melodies. These melodies were presented in 3 conditions: (a) melodic contour only (pitches in equal durations); (b) melodic contour with rhythmic patterns; and (c) melodic contour with rhythmic patterns and lyrics. The results indicated that pediatric cochlear implant recipients performed with greater accuracy in melody recognition when lyrics were available. Their scores were significantly lower when melodies containing only pitch features. Providing the rhythmic patterns aided participants' identification of the target melodies, but less so than the lyrics. Applications of findings to aural rehabilitation are discussed.

  1. Brazilian adaptation of the Functioning after Pediatric Cochlear Implantation (FAPCI: comparison between normal hearing and cochlear implanted children

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    Trissia M.F. Vassoler

    2015-04-01

    Full Text Available OBJECTIVE: Enabling development of the ability to communicate effectively is the principal objective of cochlear implantation (CI in children. However, objective and effective metrics of communication for cochlear-implanted Brazilian children are lacking . The Functioning after Pediatric Cochlear Implantation (FAPCI, a parent/caregiver reporting instrument developed in the United States, is the first communicative performance scale for evaluation of real-world verbal communicative performance of 2-5-year-old children with cochlear implants. The primary aim was to cross-culturally adapt and validate the Brazilian-Portuguese version of the FAPCI. The secondary aim was to conduct a trial of the adapted Brazilian-Portuguese FAPCI (FAPCI-BP in normal hearing (NH and CI children. METHODS: The American-English FAPCI was translated by a rigorous forward-backward process. The FAPCI-BP was then applied to the parents of children with NH (n = 131 and CI (n = 13, 2-9 years of age. Test-retest reliability was verified. RESULTS: The FAPCI-BP was confirmed to have excellent internal consistency (Cronbach's alpha > 0.90. The CI group had lower FAPCI scores (58.38 ± 22.6 than the NH group (100.38 ± 15.2; p < 0.001, Wilcoxon test. CONCLUSION: The present results indicate that the FAPCI-BP is a reliable instrument. It can be used to evaluate verbal communicative performance in children with and without CI. The FAPCI is currently the only psychometrically-validated instrument that allows such measures in cochlear-implanted children.

  2. Modeling of Auditory Neuron Response Thresholds with Cochlear Implants

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    Frederic Venail

    2015-01-01

    Full Text Available The quality of the prosthetic-neural interface is a critical point for cochlear implant efficiency. It depends not only on technical and anatomical factors such as electrode position into the cochlea (depth and scalar placement, electrode impedance, and distance between the electrode and the stimulated auditory neurons, but also on the number of functional auditory neurons. The efficiency of electrical stimulation can be assessed by the measurement of e-CAP in cochlear implant users. In the present study, we modeled the activation of auditory neurons in cochlear implant recipients (nucleus device. The electrical response, measured using auto-NRT (neural responses telemetry algorithm, has been analyzed using multivariate regression with cubic splines in order to take into account the variations of insertion depth of electrodes amongst subjects as well as the other technical and anatomical factors listed above. NRT thresholds depend on the electrode squared impedance (β = −0.11 ± 0.02, P<0.01, the scalar placement of the electrodes (β = −8.50 ± 1.97, P<0.01, and the depth of insertion calculated as the characteristic frequency of auditory neurons (CNF. Distribution of NRT residues according to CNF could provide a proxy of auditory neurons functioning in implanted cochleas.

  3. Modeling of Auditory Neuron Response Thresholds with Cochlear Implants.

    Science.gov (United States)

    Venail, Frederic; Mura, Thibault; Akkari, Mohamed; Mathiolon, Caroline; Menjot de Champfleur, Sophie; Piron, Jean Pierre; Sicard, Marielle; Sterkers-Artieres, Françoise; Mondain, Michel; Uziel, Alain

    2015-01-01

    The quality of the prosthetic-neural interface is a critical point for cochlear implant efficiency. It depends not only on technical and anatomical factors such as electrode position into the cochlea (depth and scalar placement), electrode impedance, and distance between the electrode and the stimulated auditory neurons, but also on the number of functional auditory neurons. The efficiency of electrical stimulation can be assessed by the measurement of e-CAP in cochlear implant users. In the present study, we modeled the activation of auditory neurons in cochlear implant recipients (nucleus device). The electrical response, measured using auto-NRT (neural responses telemetry) algorithm, has been analyzed using multivariate regression with cubic splines in order to take into account the variations of insertion depth of electrodes amongst subjects as well as the other technical and anatomical factors listed above. NRT thresholds depend on the electrode squared impedance (β = -0.11 ± 0.02, P < 0.01), the scalar placement of the electrodes (β = -8.50 ± 1.97, P < 0.01), and the depth of insertion calculated as the characteristic frequency of auditory neurons (CNF). Distribution of NRT residues according to CNF could provide a proxy of auditory neurons functioning in implanted cochleas.

  4. Cochlear implantation outcomes in children with Waardenburg syndrome.

    Science.gov (United States)

    Amirsalari, Susan; Ajallouyean, Mohammad; Saburi, Amin; Haddadi Fard, Adel; Abed, Maryam; Ghazavi, Yasaman

    2012-10-01

    Waardenburg syndrome (WS) is an autosomal dominant disease, characterized by dystopia canthorum, hyperplasia of the eyebrows, heterochromia iridis, white forelock, and congenital sensori-neural hearing loss (SNHL). The aim of this study was to evaluate the outcome of cochlear implantation in children with WS and compare it with children with pure SNHL. In a prospective study we evaluated 336 cochlear implanted children from 2008 to 2010. The WS was diagnosed by its established criteria and for control group children without any dysmorphic features, anatomical, behavioral, and developmental disorders were also enrolled. We evaluated children of both groups 1 year after cochlear implantation by categories of auditory performance (CAP) and speech intelligibility rating (SIR) tests. Eighty-one children out of the total 336 who had SNHL were included in study. Out of these 75 (22.3%) were healthy and six (1.78%) had WS. Of the 75 healthy children 40 (53.3%) were girls, while of the six children with WS, three (50%) were girls. There was a significant difference in SIR between WS and cases with pure SNHL (2.67 ± 1.03 vs. 3.79 ± 1.11, p = 021) however, the difference was not significant in CAP (4 ± 1.26 vs. 5.13 ± 1.13, p = 0.082). Prevalence of WS was 1.78% at Baqiyatallah Cochlear Implant Center. One year after implantation there was no significant difference in auditory outcome; however, the difference in speech outcome was significant between WS and cases with pure SNHL.

  5. Complications in cochlear implantation at the Clinical Center of Vojvodina

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    Dankuc Dragan

    2015-01-01

    Full Text Available Introduction. The first modern cochlear implantation in Serbia was performed on November 26, 2002 at the Center for Cochlear Implantation of the Clinic for Ear, Nose and Throat Diseases, Clinical Center of Vojvodina. Objective. The aim of the paper is the analysis of intraoperative and postoperative complications. Major complications include those resulting in the necessity for revision surgery, explantation, reimplantation, severe disease or even lethal outcomes. Minor complications resolve spontaneously or can be managed by conservative therapy and do not require any prolonged hospitalization of the patient. Methods. In the 2002-2013 period, 99 patients underwent surgical procedures and 100 cochlear implants were placed. Both intraoperative and postoperative complications were analyzed in the investigated patient population. Results. The analysis encompassed 99 patients, the youngest and the oldest ones being one year old and 61 years old, respectively. The complications were noticed in 11 patients, i.e. in 10.5% of 105 surgical procedures. The majority of procedures (89.5% were not accompanied by any post-surgical complications. Unsuccessful implantation in a single-step procedure (4.04% and transient facial nerve paralysis can be considered most frequent among our patients, whereas cochlear ossification (1.01% and transient ataxia (2.02% occurred rarely. Stimulation of the facial nerve (1.01%, intraoperative perilymph liquid gusher (1.01%, device failure and late infections (1.01% were recorded extremely rarely. Conclusion. Complications such as electrode extrusion, skin necrosis over the implant or meningitis, which is considered the most severe postoperative complication, have not been recorded at our Center since the very beginning. Absence of postoperative meningitis in patients treated at the Center can be attributed to timely pneumococcal vaccination of children.

  6. Cochlear implant: what the radiologist should know; Implante coclear: o que o radiologista precisa saber

    Energy Technology Data Exchange (ETDEWEB)

    Gomes, Natalia Delage; Couto, Caroline Laurita Batista; Gaiotti, Juliana Oggioni; Costa, Ana Maria Doffemond; Ribeiro, Marcelo Almeida; Diniz, Renata Lopes Furletti Caldeira, E-mail: nataliadelagegomes@gmail.com [Hospital Mater Dei, Belo Horizonte, MG (Brazil). Unidade de Radiologia e Diagnostico por Imagem

    2013-05-15

    Cochlear implant is the method of choice in the treatment of deep sensorineural hypoacusis, particularly in patients where conventional amplification devices do not imply noticeable clinical improvement. Imaging findings are crucial in the indication or contraindication for such surgical procedure. In the assessment of the temporal bone, radiologists should be familiar with relative or absolute contraindication factors, as well as with factors that might significantly complicate the implantation. Some criteria such as cochlear nerve aplasia, labyrinthine and/or cochlear aplasia are still considered as absolute contraindications, in spite of studies bringing such criteria into question. Cochlear dysplasias constitute relative contraindications, among them labyrinthitis ossificans is highlighted. Other alterations may be mentioned as complicating agents in the temporal bone assessment, namely, hypoplasia of the mastoid process, aberrant facial nerve, otomastoiditis, otosclerosis, dehiscent jugular bulb, enlarged endolymphatic duct and sac. The experienced radiologist assumes an important role in the evaluation of this condition. (author)

  7. The influence of newborn hearing screening on the age at cochlear implantation in children

    NARCIS (Netherlands)

    Lammers, Marc J W; Jansen, Thijs T G; Grolman, Wilko; Lenarz, Thomas; Versnel, Huib; Van Zanten, Gijsbert A.; Topsakal, Vedat; Lesinski-Schiedat, Anke

    2015-01-01

    Objectives/Hypothesis To evaluate the influence of the introduction of newborn hearing screening programs on the age at cochlear implantation in children. Study Design Retrospective, multicenter cohort study. Methods All 1,299 pediatric cochlear implant users who received their implants before the a

  8. Bilateral cochlear implantation in children: a systematic review and best-evidence synthesis

    NARCIS (Netherlands)

    Lammers, M.J.W.; van der Heijden, G.J.M.G.; Pourier, V.E.C.; Grolman, W.

    2014-01-01

    Objectives/Hypothesis To evaluate the effectiveness of bilateral cochlear implantation over unilateral implantation in children with sensorineural hearing loss. Data Sources Pubmed, Embase, and Web of Science. Review Methods All studies comparing a bilateral cochlear implant group with a unilateral

  9. Educational Interpreters: Meeting the Communication Needs of Children with Cochlear Implants

    Science.gov (United States)

    Melton, Julie; Higbee, Renee

    2013-01-01

    Since the early 1990s, when the U.S. Food and Drug Administration approved cochlear implants for deaf and hard of hearing children, the number of children who have cochlear implants has increased in mainstream settings. Recent research suggests that these students, like their deaf and hard of hearing peers without implants who use sign language,…

  10. Temporary deafness can impair multisensory integration: a study of cochlear-implant users.

    Science.gov (United States)

    Landry, Simon P; Guillemot, Jean-Paul; Champoux, François

    2013-07-01

    Previous investigations suggest that temporary deafness can have a dramatic impact on audiovisual speech processing. The aim of this study was to test whether temporary deafness disturbs other multisensory processes in adults. A nonspeech task involving an audiotactile illusion was administered to a group of normally hearing individuals and a group of individuals who had been temporarily auditorily deprived. Members of this latter group had their auditory detection thresholds restored to normal levels through the use of a cochlear implant. Control conditions revealed that auditory and tactile discrimination capabilities were identical in the two groups. However, whereas normally hearing individuals integrated auditory and tactile information, so that they experienced the audiotactile illusion, individuals who had been temporarily deprived did not. Given the basic nature of the task, failure to integrate multisensory information could not be explained by the use of the cochlear implant. Thus, the results suggest that normally anticipated audiotactile interactions are disturbed following temporary deafness.

  11. Hearing preservation in cochlear implantation and drug treatment.

    Science.gov (United States)

    Barriat, Sebastien; Poirrier, Annelise; Malgrange, Brigitte; Lefebvre, Philippe

    2010-01-01

    Insertion of an electrode array into the cochlea produces immediate damage to the inner ear, which is responsible for a hearing loss. In addition, a delayed hearing loss can be observed. In order to maximize hearing preservation after insertion of an electrode and to enhance the performance of the cochlear implant, it has been proposed to deliver pharmacological agents to the inner ear. Molecules can be administered locally to the inner ear through a direct perilymphatic perfusion or through the round window membrane. These modalities of treatment have already been successfully applied to some patients with inner ear diseases. In this paper, we will review some basic aspects of drug delivery to the inner ear to prevent the degeneration of the neurosensory hair cells and auditory neurons, and the actual applicability to humans in order to maintain hearing function after the insertion of electrodes of a cochlear implant.

  12. A beamformer post-filter for cochlear implant noise reduction.

    Science.gov (United States)

    Hersbach, Adam A; Grayden, David B; Fallon, James B; McDermott, Hugh J

    2013-04-01

    Cochlear implant users have limited ability to understand speech in noisy conditions. Signal processing methods to address this issue that use multiple microphones typically use beamforming to perform noise reduction. However, the effectiveness of the beamformer is diminished as the number of interfering noises increases and the acoustic environment becomes more diffuse. A multi-microphone noise reduction algorithm that aims to address this issue is presented in this study. The algorithm uses spatial filtering to estimate the signal-to-noise ratio (SNR) and attenuates time-frequency elements that have poor SNR. The algorithm was evaluated by measuring intelligibility of speech embedded in 4-talker babble where the interfering talkers were spatially separated and changed location during the test. Twelve cochlear implant users took part in the evaluation, which demonstrated a significant mean improvement of 4.6 dB (standard error 0.4, P noise is spatially separated from the target speech.

  13. Deafness: Cross-modal plasticity and cochlear implants

    Science.gov (United States)

    Lee, Dong Soo; Lee, Jae Sung; Oh, Seung Ha; Kim, Seok-Ki; Kim, Jeung-Whoon; Chung, June-Key; Lee, Myung Chul; Kim, Chong Sun

    2001-01-01

    Hearing in profoundly deaf people can be helped by inserting an implant into the inner ear to stimulate the cochlear nerve. This also boosts the low metabolic activity of the auditory cortex, the region of the brain normally used for hearing. Other sensory modalities, such as sign language, can also activate the auditory cortex, a phenomenon known as cross-modal plasticity. Here we show that when metabolism in the auditory cortex of prelingually deaf children (whose hearing was lost before they learned to talk) has been restored by cross-modal plasticity, the auditory cortex can no longer respond to signals from a cochlear implant installed afterwards. Neural substrates in the auditory cortex might therefore be routed permanently to other cognitive processes in prelingually deaf patients.

  14. Music recognition by Japanese children with cochlear implants.

    Science.gov (United States)

    Nakata, Takayuki; Trehub, Sandra E; Mitani, Chisato; Kanda, Yukihiko; Shibasaki, Atsuko; Schellenberg, E Glenn

    2005-01-01

    Congenitally deaf Japanese children with cochlear implants were tested on their recognition of theme songs from television programs that they watched regularly. The children, who were 4-9 years of age, attempted to identify each song from a closed set of alternatives. Their song identification ability was examined in the context of the original commercial recordings (vocal plus instrumental), the original versions without the words (i.e., karaoke versions), and flute versions of the melody. The children succeeded in identifying the music only from the original versions, and their performance was related to their music listening habits. Children gave favorable appraisals of the music even when they were unable to recognize it. Further research is needed to find means of enhancing cochlear implants users' perception and appreciation of music.

  15. Comparison of intonation production in cochlear-implanted children and normal hearing children

    Directory of Open Access Journals (Sweden)

    Mandana Nourbakhsh

    2012-06-01

    Full Text Available Background and Aim: Due to defects of auditory feedback, children with hearing loss have inappropriate speech intonation. Consistently, results of previous studies have shown that cochlear-implanted children have some difficulties in their intonation. Intonation shows the type of the sentence which can be statement or question sentences. The purpose of this study was comparison of speech intonation in cochlear-implanted children and normal hearing children.Methods: The present study was performed on 25 cochlear-implanted children and 50 normal hearing children. Different pictures were shown to the subjects and they said statement and question sentences. All sentences were heard by eight speech therapists and perceptually judged. Using praat software mean base frequency and pitch alterations were measured.Results: In cochlear-implanted group, mean speech base frequency was higher and mean pitch alteration was lower than the control group. Mean experts' scores in cochlear-implanted group were lower than the control group. Differences in all three variables were statistically significant (p<0.05. There was a significant direct correlation between duration of time that the children had cochlear implant and perceptual judgment scores (p<0.05.Conclusion: According to the results, cochlear implant prosthesis has limited efficacy in improving speech intonation; although their ability to produce speech intonation improves by increasing duration of the time that children have cochlear implant. Thus speech therapists should consider intervening on speech intonation in treatment program of cochlear-implanted children.

  16. Perceptual Development of Nasal Consonants in Children with Normal Hearing and in Children Who Use Cochlear Implants

    Science.gov (United States)

    Guillot, Kathryn M.; Ohde, Ralph N.; Hedrick, Mark

    2013-01-01

    Purpose: This study was conducted to determine whether the perceptions of nasal consonants in children with normal hearing and children with cochlear implants were predicted by the discontinuity hypothesis. Methods: Four groups participated: 8 adults, 8 children with normal hearing (ages 5-7 years), 8 children with normal hearing (ages 3.5-4…

  17. "COCHLEAR IMPLANTATION IN PATIENTS WITH INNER EAR MALFORMATIONS"

    Directory of Open Access Journals (Sweden)

    P. Borghei S. Abdi

    2004-08-01

    Full Text Available Performing cochlear implantation in patients with inner ear malformation has always been a matter of dispute. This study was designed to analyze the operative findings,complications, and postoperative performance of patients with inner ear anomalies who underwent cochlear implantation. Six patients with inner ear malformations underwent implantation in our academic tertiary referral center from 1997 to 2002. The average follow-up period was 27 months. Malformations included one incomplete partition, one common cavity, one narrow internal acoustic canal (IAC in a patient with Riley-Day syndrome and 3 cases of large vestibular aqueduct. All received multi-channel implants either Nucleus 22 or Clarion device. Facial nerve was anomalous in 2 cases. CSF gusher occurred in 4 patients, which was controlled with packing the cochleostomy site. In all cases, the full length of electrode array was inserted, except one with Mondini's dysplasia where insertion failed in the first operation and was referred to another center for a successful surgery on the opposite ear. No other surgical complications were encountered. In 4 cases, all the 22 electrodes could be activated. All patients showed improved hearing performance after implantation. Four showed open-set speech recognition. The one with narrow IAC showed improved awareness to environmental sounds. In the other case (common cavity, the perception tests could not be performed because of very young age. Cochlear implantation in patients with inner ear malformations is a successful way of rehabilitation, although complications should be expected and auditory responses may be highly variable and relatively moderate.

  18. Multi-channel cochlear implantation in patients with a post-traumatic sensorineural hearing loss.

    Science.gov (United States)

    Moore, A; Cheshire, I M

    1999-01-01

    There are few accounts of cochlear implantation in adults with post-traumatic sensorineural hearing loss. We report our experience with multichannel implantation in three such patients. Two patients experienced no cognitive or communication deficits as a result of their head injury. At nine months post-implant, compared with our experience of non-head-injured implantees, these patients achieved average or above average scores on audiological performance tests. The third patient presented with cognitive, behavioural and communicative deficits. The level of improvement achieved by this patient, when lip-reading was supplemented with electrical stimulation, in both BKB sentence and connected discourse tracking (CDT) tests was comparable with that of the non-head-injured group. However, his absolute performance at nine months post-implant was well below average. Performance at 18 months on BKB sentences and environmental sound recognition showed little change, and was again well below average, however his score on CDT with lip-reading and electrical stimulation improved considerably and was similar to the average achieved by the non-head-injured group. The major difficulties experienced with this patient were increasing depression and low implant use. Considerably more time was spent in the assessment and rehabilitation of this patient and involved liaison with a number of other agencies. When considering such patients for cochlear implantation it is strongly recommended that these additional requirements are taken into account.

  19. Digital X-ray stereophotogrammetry for cochlear implantation.

    Science.gov (United States)

    Wang, G; Skinner, M W; Rubinstein, J T; Howard, M A; Vannier, M W

    2000-08-01

    Multielectrode, intracochlear implant systems are effective treatment for profound sensorineural hearing loss. In some cases, these systems do not perform well, which may be partially due to variations in implant location within the cochlea. Determination of each electrode's position in a patient's inner ear provides an in vivo basis for both the cochlear modeling of electrical fields and the future design of electrode arrays that deliver electrical stimulation to surviving auditory neurons, and may improve speech processor programming for better speech recognition. We developed an X-ray stereophotogrammetric approach to localize implanted electrodes in three dimensions. Stereophotogrammetry of implanted electrodes is formulated in weak perspective geometry, with knowledge of a three-dimensional (3-D) reference structure and electrode positions in each of two digital stereo-images. The localization error is theoretically, numerically, and experimentally quantified. Both numerical and experimental results demonstrate the feasibility of the technique.

  20. Effects of deafness and cochlear implant use on temporal response characteristics in cat primary auditory cortex.

    Science.gov (United States)

    Fallon, James B; Shepherd, Robert K; Nayagam, David A X; Wise, Andrew K; Heffer, Leon F; Landry, Thomas G; Irvine, Dexter R F

    2014-09-01

    We have previously shown that neonatal deafness of 7-13 months duration leads to loss of cochleotopy in the primary auditory cortex (AI) that can be reversed by cochlear implant use. Here we describe the effects of a similar duration of deafness and cochlear implant use on temporal processing. Specifically, we compared the temporal resolution of neurons in AI of young adult normal-hearing cats that were acutely deafened and implanted immediately prior to recording with that in three groups of neonatally deafened cats. One group of neonatally deafened cats received no chronic stimulation. The other two groups received up to 8 months of either low- or high-rate (50 or 500 pulses per second per electrode, respectively) stimulation from a clinical cochlear implant, initiated at 10 weeks of age. Deafness of 7-13 months duration had no effect on the duration of post-onset response suppression, latency, latency jitter, or the stimulus repetition rate at which units responded maximally (best repetition rate), but resulted in a statistically significant reduction in the ability of units to respond to every stimulus in a train (maximum following rate). None of the temporal response characteristics of the low-rate group differed from those in acutely deafened controls. In contrast, high-rate stimulation had diverse effects: it resulted in decreased suppression duration, longer latency and greater jitter relative to all other groups, and an increase in best repetition rate and cut-off rate relative to acutely deafened controls. The minimal effects of moderate-duration deafness on temporal processing in the present study are in contrast to its previously-reported pronounced effects on cochleotopy. Much longer periods of deafness have been reported to result in significant changes in temporal processing, in accord with the fact that duration of deafness is a major factor influencing outcome in human cochlear implantees.

  1. Rehabilitation of deaf persons with cochlear implants; Rehabilitation Hoergeschaedigter mit Cochlearimplantaten

    Energy Technology Data Exchange (ETDEWEB)

    Gstoettner, W.; Hamzavi, J. [Universitaetsklinik fuer Hals-Nasen-Ohrenheilkunde, Wien (Austria); Czerny, C. [Universitaetsklinik fuer Radiologie, Wien (Austria)

    1997-12-01

    In the last decade, the rehabilitation of postlingually deaf adults and prelingually deaf children with cochlear implants has been established as a treatment of deafness. The technological development of the implant devices and improvement of the surgical technique have led to a considerable increase of hearing performance during the last years. The postlingually deaf adults are able to use the telephone and may be integrated in their original job. Prelingually deaf children can even visit normal schools after cochlear implantation and hearing rehabilitation training. In order to preoperatively establish the state of the cochlear, radiological diagnosis of the temporal bone is necessary. High resolution computerized tomography imaging of the temporal bone with coronar and axial 1 mm slices and MRI with thin slice technique (three dimensional, T2 weighted turbo-spinecho sequence with 0.7 mm slices) have proved to be valuable according to our experience. Furthermore a postoperative synoptical X-ray, in a modified Chausse III projection, offers good information about the position of the implant and insertion of the stimulating electrode into the cochlea. (orig.) [Deutsch] In der letzten Dekade hat sich der operative Einsatz von Cochlearimplantaten fuer die Rehabilitation taubgeborener Kinder und ertaubter Erwachsenen als erfolgreiche Therapie etabliert. Durch technische Weiterentwicklung der Implantatsysteme und Verbesserung der Operationstechnik konnten in den letzten Jahren die Hoerleistungen der Patienten deutlich verbessert werden. Postlingual ertaubte Erwachsene koennen nun oftmals wieder ins Berufsleben eingegliedert werden und praelingual ertaubte Kinder koennen regulaere Schulen besuchen. Im Rahmen der Voruntersuchung fuer die Cochlearimplantation ist die radiologische Felsenbeindiagnostik von besonderer Bedeutung. Hochaufloesendes CT des Felsenbeins in koronaren und axialen Ebenen mit 1 mm Schichtdicke und MRT in Duennschichttechnik (dreidimensionale, T2

  2. Cochlear implant surgery at the Clinical Center of Vojvodina - ten-year experience

    Directory of Open Access Journals (Sweden)

    Dankuc Dragan

    2014-01-01

    Full Text Available Introduction. The first cochlear implant surgery was performed at the Center for Cochlear Implantation of the Department of Ear, Nose and Throat Diseases, Clinical Center of Vojvodina in 2002 after long preparations and that was the first successful cochlear implantation in Serbia. Material and Methods. Over the period from November 2002 to November 2013, 99 patients underwent surgical procedures and 100 cochlear implants were placed. Results. The analysis encompassed 99 patients, the youngest and the oldest one being 1 year and 61 years old, respectively. Prelingual and postlingual deafness developed in 84 (84.9% and in 15 (15.1%, respectively. Postlingual deafness was observed in all 11 adult patients. The prelingual deafness was diagnosed in 84 (95.4% children, whereas in four (4.6% children it occurred after the development of speech between 6 and 8 years of age. Progressive hearing loss was observed in 11 patients - seven adults and four children. The majority of our patients, i.e. 74 (74.75% manifested idiopathic deafness of unknown cause. A range of usually reported hearing loss etiologies included ototoxic medications in seven (7.07%, hereditary factor in six (6.06%, and bacterial meningitis in four (4.04% patients. Somewhat less common causes were perinatal hypoxia in three (3.03%, premature birth in three (3.03%, Down syndrome in one (1.01%, and chronic otitis media in one (1.01% patient. Conclusion. Both intraoperative and postoperative complications were analyzed in the investigated patient population. The complications developed in 11 patients, i.e. in 10.5% of 105 surgical procedures. The majority of procedures (89.5% were not accompanied by any post-surgical complications. Unsuccessful implantation in a single-step procedure and transient facial nerve paralysis can be considered most frequent among our patients, whereas cochlear ossification and transient ataxia occurred more rarely. Stimulation of facial nerve, intraoperative

  3. The Self-Regulation of a Child with Cochlear Implants within a School Environment

    Science.gov (United States)

    Patton, Kristin L.

    2013-01-01

    The purpose of this qualitative research, which utilized a narrative design strategy, was to describe the process of self-regulation of a child who has bilateral cochlear implants within the social environment of school. The study investigated the use of self-regulatory strategies by the cochlear implant recipient. It also examined how the child…

  4. Comparison of Auditory Perception in Cochlear Implanted Children with and without Additional Disabilities

    Directory of Open Access Journals (Sweden)

    Seyed Basir Hashemi

    2016-05-01

    Full Text Available Background: The number of children with cochlear implants who have other difficulties such as attention deficiency and cerebral palsy has increased dramatically. Despite the need for information on the results of cochlear implantation in this group, the available literature is extremely limited. We, therefore, sought to compare the levels of auditory perception in children with cochlear implants with and without additional disabilities. Methods: A spondee test comprising 20 two-syllable words was performed. The data analysis was done using SPSS, version 19. Results: Thirty-one children who had received cochlear implants 2 years previously and were at an average age of 7.5 years were compared via the spondee test. From the 31 children,15 had one or more additional disabilities. The data analysis indicated that the mean score of auditory perception in this group was approximately 30 scores below that of the children with cochlear implants who had no additional disabilities. Conclusion: Although there was an improvement in the auditory perception of all the children with cochlear implants, there was a noticeable difference in the level of auditory perception between those with and without additional disabilities. Deafness and additional disabilities depended the children on lip reading alongside the auditory ways of communication. In addition, the level of auditory perception in the children with cochlear implants who had more than one additional disability was significantly less than that of the other children with cochlear implants who had one additional disability.

  5. Spelling in Written Stories by School-Age Children with Cochlear Implants

    Science.gov (United States)

    Straley, Sara G.; Werfel, Krystal L.; Hendricks, Alison Eisel

    2016-01-01

    This study evaluated the spelling of 3rd to 6th grade children with cochlear implants in written stories. Spelling was analysed using traditional correct/incorrect scoring as well as the Spelling Sensitivity Score, which provides linguistic information about spelling attempts. Children with cochlear implants spelled 86 per cent of words in stories…

  6. Speech and Literacy Development in a Child with a Cochlear Implant: Application of a Psycholinguistic Framework

    Science.gov (United States)

    Pascoe, Michelle; Randall-Pieterse, Candice; Geiger, Martha

    2013-01-01

    This single case study describes the speech, phonological awareness and literacy of a 6;0-year-old girl with a cochlear implant. NG, a child with a congenital bilateral severe/profound hearing loss, received a monaural cochlear implant at the age of 3;0, three years prior to the study. Using a psycholinguistic framework to investigate her single…

  7. Sequential bilateral cochlear implantation in children: parents' perspective and device use.

    NARCIS (Netherlands)

    Sparreboom, M.; Leeuw, A.R.; Snik, A.F.M.; Mylanus, E.A.M.

    2012-01-01

    OBJECTIVE: The purpose of this study was (1) to measure parental expectations before surgery of a sequentially placed second cochlear implant and compare these results with parental observations postoperatively and (2) to measure device use of the second cochlear implant and compare to unilateral im

  8. Persistent Language Delay versus Late Language Emergence in Children with Early Cochlear Implantation

    Science.gov (United States)

    Geers, Ann E.; Nicholas, Johanna; Tobey, Emily; Davidson, Lisa

    2016-01-01

    Purpose: The purpose of the present investigation is to differentiate children using cochlear implants (CIs) who did or did not achieve age-appropriate language scores by mid-elementary grades and to identify risk factors for persistent language delay following early cochlear implantation. Materials and Method: Children receiving unilateral CIs at…

  9. Contribution of Family Environment to Pediatric Cochlear Implant Users' Speech and Language Outcomes: Some Preliminary Findings

    Science.gov (United States)

    Holt, Rachael Frush; Beer, Jessica; Kronenberger, William G.; Pisoni, David B.; Lalonde, Kaylah

    2012-01-01

    Purpose: To evaluate the family environments of children with cochlear implants and to examine relationships between family environment and postimplant language development and executive function. Method: Forty-five families of children with cochlear implants completed a self-report family environment questionnaire (Family Environment Scale-Fourth…

  10. Children with Cochlear Implants and Developmental Disabilities: A Language Skills Study with Developmentally Matched Hearing Peers

    Science.gov (United States)

    Meinzen-Derr, Jareen; Wiley, Susan; Grether, Sandra; Choo, Daniel I.

    2011-01-01

    The number of children receiving cochlear implants (CIs) with significant disabilities in addition to their deafness has increased substantially. Unfortunately, children with additional disabilities receiving CIs have largely been excluded from studies on cochlear implant outcomes. Thus limited data exists on outcomes in this population to guide…

  11. Phonological Awareness and Print Knowledge of Preschool Children with Cochlear Implants

    Science.gov (United States)

    Ambrose, Sophie E.; Fey, Marc E.; Eisenberg, Laurie S.

    2012-01-01

    Purpose: To determine whether preschool-age children with cochlear implants have age-appropriate phonological awareness and print knowledge and to examine the relationships of these skills with related speech and language abilities. Method: The sample comprised 24 children with cochlear implants (CIs) and 23 peers with normal hearing (NH), ages 36…

  12. Children with Cochlear Implants in Australia: Educational Settings, Supports, and Outcomes

    Science.gov (United States)

    Punch, Renee; Hyde, Merv

    2010-01-01

    This Australian study examined the communication, academic, and social outcomes of pediatric cochlear implantation from the perspectives of teachers working with children with cochlear implants. The children were aged from 1 to 18 years and attended a range of educational settings in early intervention, primary, and secondary schooling. One…

  13. Close-field electroporation gene delivery using the cochlear implant electrode array enhances the bionic ear.

    Science.gov (United States)

    Pinyon, Jeremy L; Tadros, Sherif F; Froud, Kristina E; Y Wong, Ann C; Tompson, Isabella T; Crawford, Edward N; Ko, Myungseo; Morris, Renée; Klugmann, Matthias; Housley, Gary D

    2014-04-23

    The cochlear implant is the most successful bionic prosthesis and has transformed the lives of people with profound hearing loss. However, the performance of the "bionic ear" is still largely constrained by the neural interface itself. Current spread inherent to broad monopolar stimulation of the spiral ganglion neuron somata obviates the intrinsic tonotopic mapping of the cochlear nerve. We show in the guinea pig that neurotrophin gene therapy integrated into the cochlear implant improves its performance by stimulating spiral ganglion neurite regeneration. We used the cochlear implant electrode array for novel "close-field" electroporation to transduce mesenchymal cells lining the cochlear perilymphatic canals with a naked complementary DNA gene construct driving expression of brain-derived neurotrophic factor (BDNF) and a green fluorescent protein (GFP) reporter. The focusing of electric fields by particular cochlear implant electrode configurations led to surprisingly efficient gene delivery to adjacent mesenchymal cells. The resulting BDNF expression stimulated regeneration of spiral ganglion neurites, which had atrophied 2 weeks after ototoxic treatment, in a bilateral sensorineural deafness model. In this model, delivery of a control GFP-only vector failed to restore neuron structure, with atrophied neurons indistinguishable from unimplanted cochleae. With BDNF therapy, the regenerated spiral ganglion neurites extended close to the cochlear implant electrodes, with localized ectopic branching. This neural remodeling enabled bipolar stimulation via the cochlear implant array, with low stimulus thresholds and expanded dynamic range of the cochlear nerve, determined via electrically evoked auditory brainstem responses. This development may broadly improve neural interfaces and extend molecular medicine applications.

  14. Significant regional differences in Denmark in outcome after cochlear implants in children

    DEFF Research Database (Denmark)

    Percy-Smith, Lone; Busch, Georg Walter; Sandahl, Minna;

    2012-01-01

    The objectives of the present study were to study regional differences in outcome for a paediatric cochlear implant (CI) population after the introduction of universal neonatal hearing screening (UNHS) and bilateral implantation in Denmark.......The objectives of the present study were to study regional differences in outcome for a paediatric cochlear implant (CI) population after the introduction of universal neonatal hearing screening (UNHS) and bilateral implantation in Denmark....

  15. The Effects of Psychological Factors on Comfortable Levels for Adult Cochlear Implants%心理因素对成人耳蜗植入者舒适阈的影响

    Institute of Scientific and Technical Information of China (English)

    孔颖; 李淑静; 陈雪清; 杨宜林; 刘海红; 吴燕君; 刘莎

    2012-01-01

    Objective To explore the effects of psychological factors on comfortable levels for adult cochlear im plants and to provide the basic mapping data for them. Methods The self-report symptom inventory(SCL- 90) was used to evaluate the mental health status of 61 adult cochlear implants, and the resucts were compared with the domestic norms. The patients were divided into two groups according to the assessment results: the good mental health group and the poor mental health group. To observe the changes of comfortable levels at the time of 1 month,3 months,6 months after switch - on. Results There were significant differences between adult cochlear implants and domestic norms in four factors of SCL-90 (P0. 05). Conclusion The comfortable levels of good mental health group significantly increased with the time after switch-on. The comfortable levels of poor mental health group gradually increased with the time after switch-on. The psychological factors could affect the changes of comfortable levels, so that there was need to minimize the effect of psycho logical factors om the test in mapping to obtain more accurate comfortable levels.%目的 探讨心理因素对成人耳蜗植入者舒适阈的影响,为成人耳蜗植入者舒适阈的设定提供参考.方法 采用症状自评量表(SCL-90)对61例成人耳蜗植入者心理健康状态进行评分,并与国内常模进行比较,得分越高,症状越重,则心理健康状况不佳.按评分结果将耳蜗植入者分为心理健康状况良好组(45例)和心理健康状况不佳组(16例),观察两组开机后1、3和6个月时舒适阈的变化.结果 成人耳蜗植入者焦虑、恐怖、偏执和精神病性四个因子得分均高于国内常模组(P0.05).结论 随开机时间延长,心理健康状况良好的成人耳蜗植入者的舒适阈显著增高,心理健康状况不佳者舒适阈缓慢增高.心理因素对舒适阈有影响,调试时要尽可能减少心理因素对测试

  16. School failure in students who are normal-hearing or deaf: with or without cochlear implants.

    Science.gov (United States)

    Duarte, Ivone; Santos, Cristina Costa; Rego, Guilhermina; Nunes, Rui

    2016-01-01

    To evaluate the impact of cochlear implants on the school failure of deaf who attend mainstream classes by comparing them to their normal-hearing peers as well as deaf without cochlear implants. This case-control study included participants aged 8-18 years. The number of school years failed was obtained from school records. The greatest differences in achievement levels were found between hearing students and those who were deaf without cochlear implants. Cochlear implants provide educational opportunities for hearing-impaired students, yet those without cochlear implants remain at a great disadvantage. These findings suggest that measures promoting greater equity and quality for all deaf students allow achievement levels closer to those of the not impaired.

  17. Comparison of intelligence quotients of first- and second-generation deaf children with cochlear implants.

    Science.gov (United States)

    Amraei, K; Amirsalari, S; Ajalloueyan, M

    2017-01-01

    Hearing impairment is a common type of sensory loss in children. Studies indicate that children with hearing impairment are deficient in social, cognitive and communication skills. This study compared the intelligence quotients of first- and second-generation deaf children with cochlear implants. This research is causal-comparative. All 15 deaf children investigated had deaf parents and were selected from Baqiyatallah Cochlear Implant Center. The 15 children with cochlear implants were paired with similar children with hearing parents using purposive sampling. The findings show that the Hotelling trace of multivariate analysis of variance (F = 6.78, p intelligence scales except knowledge. It can be assumed that second-generation children joined their family in the use of sign language as the primary experience before a cochlear implant. The use of sign language before cochlear implants is recommended.

  18. Perceptual fusion of polyphonic pitch in cochlear implant users.

    Science.gov (United States)

    Donnelly, Patrick J; Guo, Benjamin Z; Limb, Charles J

    2009-11-01

    In music, multiple pitches often occur simultaneously, an essential feature of harmony. In the present study, the authors assessed the ability of cochlear implant (CI) users to perceive polyphonic pitch. Acoustically presented stimuli consisted of one, two, or three superposed tones with different fundamental frequencies (f(0)). The normal hearing control group obtained significantly higher mean scores than the CI group. CI users performed near chance levels in recognizing two- and three-pitch stimuli, and demonstrated perceptual fusion of multiple pitches as single-pitch units. These results suggest that limitations in polyphonic pitch perception may significantly impair music perception in CI users.

  19. Music Engineering as a Novel Strategy for Enhancing Music Enjoyment in the Cochlear Implant Recipient

    Directory of Open Access Journals (Sweden)

    Gavriel D. Kohlberg

    2015-01-01

    Full Text Available Objective. Enjoyment of music remains an elusive goal following cochlear implantation. We test the hypothesis that reengineering music to reduce its complexity can enhance the listening experience for the cochlear implant (CI listener. Methods. Normal hearing (NH adults (N=16 and CI listeners (N=9 evaluated a piece of country music on three enjoyment modalities: pleasantness, musicality, and naturalness. Participants listened to the original version along with 20 modified, less complex, versions created by including subsets of the musical instruments from the original song. NH participants listened to the segments both with and without CI simulation processing. Results. Compared to the original song, modified versions containing only 1–3 instruments were less enjoyable to the NH listeners but more enjoyable to the CI listeners and the NH listeners with CI simulation. Excluding vocals and including rhythmic instruments improved enjoyment for NH listeners with CI simulation but made no difference for CI listeners. Conclusions. Reengineering a piece of music to reduce its complexity has the potential to enhance music enjoyment for the cochlear implantee. Thus, in addition to improvements in software and hardware, engineering music specifically for the CI listener may be an alternative means to enhance their listening experience.

  20. Cochlear implantation in inner ear malformations--a review article.

    Science.gov (United States)

    Sennaroglu, Levent

    2010-03-01

    Inner ear malformations constitute about 20% of congenital sensorineural hearing loss. In this review article an updated classification of cochlear malformations is provided. Incomplete partition and cochlear hypoplasia cases are each divided further into three groups. There are two main difficulties in the surgery of inner ear malformations; gusher and facial nerve abnormalities. Radiological features of malformations necessary to identify these problems preoperatively are discussed. Facial nerve abnormalities that may occur are described. Two different types of cerebrospinal fluid leakage are defined and necessary measures to prevent leakage are described. Standard and modified surgical approaches to overcome the described problems are described with literature findings. Finally meningitis which may occur with and without cochlear implantation in this special group of patients is emphasized. This is common in incomplete partition type I patients and is usually due to a fistula in one of the windows (usually oval window) which occurs as a result of cerebrospinal fluid pressure. This is a medical emergency leading to potential meningitis and measures that should be taken to stop the leak as soon as possible are described.

  1. Voice emotion recognition by cochlear-implanted children and their normally-hearing peers.

    Science.gov (United States)

    Chatterjee, Monita; Zion, Danielle J; Deroche, Mickael L; Burianek, Brooke A; Limb, Charles J; Goren, Alison P; Kulkarni, Aditya M; Christensen, Julie A

    2015-04-01

    Despite their remarkable success in bringing spoken language to hearing impaired listeners, the signal transmitted through cochlear implants (CIs) remains impoverished in spectro-temporal fine structure. As a consequence, pitch-dominant information such as voice emotion, is diminished. For young children, the ability to correctly identify the mood/intent of the speaker (which may not always be visible in their facial expression) is an important aspect of social and linguistic development. Previous work in the field has shown that children with cochlear implants (cCI) have significant deficits in voice emotion recognition relative to their normally hearing peers (cNH). Here, we report on voice emotion recognition by a cohort of 36 school-aged cCI. Additionally, we provide for the first time, a comparison of their performance to that of cNH and NH adults (aNH) listening to CI simulations of the same stimuli. We also provide comparisons to the performance of adult listeners with CIs (aCI), most of whom learned language primarily through normal acoustic hearing. Results indicate that, despite strong variability, on average, cCI perform similarly to their adult counterparts; that both groups' mean performance is similar to aNHs' performance with 8-channel noise-vocoded speech; that cNH achieve excellent scores in voice emotion recognition with full-spectrum speech, but on average, show significantly poorer scores than aNH with 8-channel noise-vocoded speech. A strong developmental effect was observed in the cNH with noise-vocoded speech in this task. These results point to the considerable benefit obtained by cochlear-implanted children from their devices, but also underscore the need for further research and development in this important and neglected area. This article is part of a Special Issue entitled .

  2. Spoken english language development among native signing children with cochlear implants.

    Science.gov (United States)

    Davidson, Kathryn; Lillo-Martin, Diane; Chen Pichler, Deborah

    2014-04-01

    Bilingualism is common throughout the world, and bilingual children regularly develop into fluently bilingual adults. In contrast, children with cochlear implants (CIs) are frequently encouraged to focus on a spoken language to the exclusion of sign language. Here, we investigate the spoken English language skills of 5 children with CIs who also have deaf signing parents, and so receive exposure to a full natural sign language (American Sign Language, ASL) from birth, in addition to spoken English after implantation. We compare their language skills with hearing ASL/English bilingual children of deaf parents. Our results show comparable English scores for the CI and hearing groups on a variety of standardized language measures, exceeding previously reported scores for children with CIs with the same age of implantation and years of CI use. We conclude that natural sign language input does no harm and may mitigate negative effects of early auditory deprivation for spoken language development.

  3. Dichotic Listening Can Improve Perceived Clarity of Music in Cochlear Implant Users

    DEFF Research Database (Denmark)

    Vannson, Nicolas; Innes-Brown, Hamish; Marozeau, Jeremy

    2015-01-01

    Musical enjoyment for cochlear implant (CI) recipients is often reported to be unsatisfactory. Our goal was to determine whether the musical experience of postlingually deafened adult CI recipients could be enriched by presenting the bass and treble clef parts of short polyphonic piano pieces...... separately to each ear (dichotic). Dichotic presentation should artificially enhance the lateralization cues of each part and help the listeners to better segregate them and thus provide greater clarity. We also hypothesized that perception of the intended emotion of the pieces and their overall enjoyment...

  4. Cross-modal perception of rhythm in music and dance by cochlear implant users.

    Science.gov (United States)

    Vongpaisal, Tara; Monaghan, Melanie

    2014-05-01

    Two studies examined adult cochlear implant (CI) users' ability to match auditory rhythms occurring in music to visual rhythms occurring in dance (Cha Cha, Slow Swing, Tango and Jive). In Experiment 1, adults CI users (n = 10) and hearing controls matched a music excerpt to choreographed dance sequences presented as silent videos. In Experiment 2, participants matched a silent video of a dance sequence to music excerpts. CI users were successful in detecting timing congruencies across music and dance at well above-chance levels suggesting that they were able to process distinctive auditory and visual rhythm patterns that characterized each style. However, they were better able to detect cross-modal timing congruencies when the reference was an auditory rhythm than when the reference was a visual rhythm. Learning strategies that encourage cross-modal learning of musical rhythms may have applications in developing novel rehabilitative strategies to enhance music perception and appreciation outcomes of child implant users.

  5. Cochlear implantation with Pulsar Med El: a novel small incision technique.

    Science.gov (United States)

    Cuda, D

    2009-04-01

    Although still widely implanted, Pulsar Med-El is rarely considered for small incision approach. Overall, 30 teen-age and adult patients were operated upon with a novel small incision (4-5 cm). Full insertion of the electrode array was achieved in all cases. No major intra-operative complications occurred. At follow-up, no flap-related complications and no migration of the receiver-stimulator were observed in the "device suture" (14 patients) or "no device suture" groups (16 patients). All patients are full-time users of the device. In conclusion, a small incision for the Pulsar Med-El cochlear implant is feasible, safe and reproducible. Ligature fixation of the device is not critical with this operation. Also with this device, in adult and teen-age patients, it is, therefore, possible to retain several typical advantages of small incision approaches.

  6. Speech feature discrimination in deaf children following cochlear implantation

    Science.gov (United States)

    Bergeson, Tonya R.; Pisoni, David B.; Kirk, Karen Iler

    2002-05-01

    Speech feature discrimination is a fundamental perceptual skill that is often assumed to underlie word recognition and sentence comprehension performance. To investigate the development of speech feature discrimination in deaf children with cochlear implants, we conducted a retrospective analysis of results from the Minimal Pairs Test (Robbins et al., 1988) selected from patients enrolled in a longitudinal study of speech perception and language development. The MP test uses a 2AFC procedure in which children hear a word and select one of two pictures (bat-pat). All 43 children were prelingually deafened, received a cochlear implant before 6 years of age or between ages 6 and 9, and used either oral or total communication. Children were tested once every 6 months to 1 year for 7 years; not all children were tested at each interval. By 2 years postimplant, the majority of these children achieved near-ceiling levels of discrimination performance for vowel height, vowel place, and consonant manner. Most of the children also achieved plateaus but did not reach ceiling performance for consonant place and voicing. The relationship between speech feature discrimination, spoken word recognition, and sentence comprehension will be discussed. [Work supported by NIH/NIDCD Research Grant No. R01DC00064 and NIH/NIDCD Training Grant No. T32DC00012.

  7. Changes in Tinnitus after Cochlear Implantation and Its Relation with Psychological Functioning

    NARCIS (Netherlands)

    Kloostra, Francka J. J.; Arnold, Rosemarie; Hofman, Rutger; Van Dijk, Pim

    2015-01-01

    This study retrospectively assessed the prevalence of tinnitus in cochlear implant patients and the changes after implantation in 212 patients implanted between 2000 and 2009. Patients were included at least 6 months after implantation and received 2 sets of questionnaires, one about the situation b

  8. 人造电子耳蜗植入者有患脑膜炎的危险%Cochlear implant recipients at risk for meningitis

    Institute of Scientific and Technical Information of China (English)

    Eric Wooltorton; 农东晓

    2004-01-01

    Cochlear implants are electronic devices that allow sound perception in some people with profound sensorineural deafhess. The US Food and Drug Administration (FDA) recently identified a possible association between cochlear implants and bacterial meningitis in 52 people worldwide. The meningitis occurred in children and adults aged 21 months to 72 years and included 12 deaths. The onset of meningitis symptoms ranged from less than 24 hours to more than 5 years after insertion of the implant, and most of the organisms isolated in 14 cases were Streptococcus pneuraoniae. Vaccination histories against pneumococcus were known for 6 of the individuals, and none had been vaccinated.

  9. Electric auditory brainstem response (E-ABR in cochlear implant children: Effect of age at implantation and duration of implant use

    Directory of Open Access Journals (Sweden)

    Nithreen Mohammed Said Abdelsalam

    2015-07-01

    Conclusion: A well-established EABR was obtained in cochlear implant children with proper parameters. The characterizations of the EABR waves including wave latencies and threshold were extracted at different electrodes. The EABR test proves to be an effective method to evaluate the functions of the auditory pathway in children after cochlear implantation.

  10. A postmeningitic cochlear implant patient who was postoperatively diagnosed as having X-linked agammaglobulinemia.

    Science.gov (United States)

    Minoda, Ryosei; Takahashi, Haruo; Miyamaru, Satoru; Masuda, Masako; Miwa, Toru; Sanuki, Tetsuji; Hirai, Toshinori; Yumoto, Eiji

    2012-12-01

    X-linked agammaglobulinemia (XLA) is caused by a mutation in the Bruton tyrosine kinase, leading to an arrest in B cell development. Consequently, patients with XLA show significant decreases in gammaglobulin. Here, we describe a child with postmeningitic deafness and XLA who underwent a cochlear implantation. His psychomotor development had been normal and his congenital immunodeficiency was noticed only postoperatively. Immunoglobulin replacement treatment was started, but he still suffered repeated infections. Eventually, his cochlear implant was removed. A preoperative check of immunological status might be advisable in postmeningitic patients undergoing cochlear implantation to reduce the risk of postoperative infectious complications.

  11. Bringing Hearing to the Deaf - Cochlear Implants: A Technical and Personal Account

    Energy Technology Data Exchange (ETDEWEB)

    Shipsey, Ian (Purdue University)

    2003-12-17

    Cochlear implants are the first device to successfully restore neural function. They have instigated a popular but controversial revolution in the treatment of deafness and they serve as a model for research in neuroscience and biomedical engineering. In this talk the physiology of natural hearing will be reviewed from the perspective of a physicist, and the function of cochlear implants will be described in the context of historical treatments, electrical engineering, psychophysics, clinical evaluation of efficacy and personal experience. The social implications of cochlear implantation and the future outlook for auditory prostheses will also be discussed.

  12. A Case of Cochlear Implantation in Bromate-Induced Bilateral Sudden Deafness.

    Science.gov (United States)

    Eom, Tae-Ho; Lee, Sungsu; Cho, Hyong-Ho; Cho, Yong-Beom

    2015-04-01

    Despite the well-established nature of bromate-induced ototoxicity, cochlear implantation after bromate intoxication has been rarely documented. We hereby present a case of a 51-year-old female deafened completely after bromate ingestion. Her hearing was not restored by systemic steroid treatment and hearing aids were of no use. A cochlear implantation was performed on her right ear 3 months after the bromate ingestion. In bromate intoxication cases, early monitoring of hearing level is necessary and other drugs with potential ototoxicity should be avoided. The outcome of cochlear implantation was excellent in this case of bromate-induced deafness.

  13. Parental mode of communication is essential for speech and language outcomes in cochlear implanted children

    DEFF Research Database (Denmark)

    Percy-Smith, Lone; Cayé-Thomasen, Per; Breinegaard, Nina

    2010-01-01

    The present study demonstrates a very strong effect of the parental communication mode on the auditory capabilities and speech/language outcome for cochlear implanted children. The children exposed to spoken language had higher odds of scoring high in all tests applied and the findings suggest a ...... a very clear benefit of spoken language communication with a cochlear implanted child.......The present study demonstrates a very strong effect of the parental communication mode on the auditory capabilities and speech/language outcome for cochlear implanted children. The children exposed to spoken language had higher odds of scoring high in all tests applied and the findings suggest...

  14. Cochlear implantation in children with keratitis-ichthyosis-deafness (KID) syndrome: outcomes in three cases.

    Science.gov (United States)

    Barker, Elizabeth J; Briggs, Robert Js

    2009-09-01

    Three children with keratitis-ichthyosis-deafness (KID) syndrome received cochlear implants at the Royal Victorian Eye and Ear Hospital. KID syndrome is a rare genodermatosis associated with mutation of the connexin-26 gene with characteristics affecting skin, hair, vision and hearing. Ichthyotic involvement of the ear canal epithelium and associated non-erosive keratosis obturans complicate hearing assessment and aid fitting. The tendency to eczematous dermatitis and otitis media is an additional problem with cochlear implantation. All cases have required additional medical management, however the outcomes show that the cochlear implant can be effective in these patients.

  15. Towards quantifying cochlear implant localization performance in complex acoustic environments.

    Science.gov (United States)

    Kerber, S; Seeber, B U

    2011-08-01

    Cochlear implant (CI) users frequently report listening difficulties in reverberant and noisy spaces. While it is common to assess speech understanding with implants in background noise, binaural hearing performance has rarely been quantified in the presence of other sources, although the binaural system is a major contributor to the robustness of speech understanding in noisy situations with normal hearing. Here, a pointing task was used to measure horizontal localization ability of a bilateral CI user in quiet and in a continuous diffuse noise interferer at a signal-to-noise ratio of 0 dB. Results were compared to localization performance of six normal hearing listeners. The average localization error of the normal hearing listeners was within normal ranges reported previously and only increased by 1.8° when the interfering noise was introduced. In contrast, the bilateral CI user showed a localization error of 22° in quiet which rose to 31° in noise. This increase was partly due to target sounds being inaudible when presented from frontal locations between -20° and +20°. With the noise present, the implant user was only able to reliably hear target sounds presented from locations well off the median plane. The results give support to the informal complaints raised by CI users and can help to define targets for the design of, e.g., noise reduction algorithms for implant processors.

  16. Individual Differences in Effectiveness of Cochlear Implants in Children Who Are Prelingually Deaf: New Process Measures of Performance.

    Science.gov (United States)

    Pisoni, David B; Cleary, Miranda; Geers, Ann E; Tobey, Emily A

    1999-01-01

    The efficacy of cochlear implants in children who are deaf has been firmly established in the literature. However, the effectiveness of cochlear implants varies widely and is influenced by demographic and experiential factors. Several key findings suggest new directions for research on central auditory factors that underlie the effectiveness of cochlear implants. First, enormous individual differences have been observed in both adults and children on a wide range of audiological outcome measures. Some patients show large increases in speech perception scores after implantation, whereas others display only modest gains on standardized tests. Second, age of implantation and length of deafness affect all outcome measures. Children implanted at younger ages do better than children implanted at older ages, and children who have been deaf for shorter periods do better than children who have been deaf for longer periods. Third, communication mode affects outcome measures. Children from "oral-only" environments do much better on standardized tests that assess phonological processing skills than children who use Total Communication. Fourth, at the present time there are no preimplant predictors of outcome performance in young children. The underlying perceptual, cognitive, and linguistic abilities and skills emerge after implantation and improve over time. Finally, there are no significant differences in audiological outcome measures among current implant devices or processing strategies. This finding suggests that the major source of variance in outcome measures lies in the neural and cognitive information processing operations that the user applies to the signal provided by the implant. Taken together, this overall pattern of results suggests that higher-level central processes such as perception, attention, learning, and memory may play important roles in explaining the large individual differences observed among users of cochlear implants. Investigations of the content

  17. Vestibular Dysfunctions in Cochlear Implant Patients; A Vestibular Evoked Myogenic Potential Study

    Directory of Open Access Journals (Sweden)

    Masoud Motasaddi Zarandy

    2011-12-01

    Full Text Available Background and Aim: Vestibular evoked myogenic potential in response to click or short tone burst stimuli have been used as a clinical test for distinguish saccule and inferior vestibular nerve diseases. Different studies show that cochlear implant could have inverse effects on vestibular structures. We aimed to investigate vestibular evoked myogenic potential in unilateral cochlear implanted individuals in compare to normal individuals.Methods: Thirty-three unilateral cochlear implanted patients (mean age 19.96 years and 30 normal hearing individuals (mean age 24-27 years as control group were enrolled in this cross- sectional study. Absolute latencies and amplitudes of myogenic potential responses were measured and compared in both groups.Results: Myogenic potential recorded in both ears of all controls were normal. No response could be recorded in 16 patients (48.48% from both ears. In three patients, responses were recorded in both ears though the amplitude of waves was reduced in implanted ear. Unilateral response could be recorded in 14 patients only in their non-implanted ear.Conclusion: Vestibular evoked myogenic potential test is a useful tool for assessing saccular function in cochlear implant patients. Damages of osseous spiral lamina and basilar membrane after cochlear implantation could result in dysfunctions of vestibular organs specially saccule. It seems that saccule could be easily damaged after cochlear implantation. This would cause absence or reduced amplitudes in myogenic potential.

  18. CSF gusher in cochlear implantation: The risk of missing CT evidence of a cochlear base defect in the presence of otherwise normal cochlear anatomy.

    Science.gov (United States)

    Cabbarzade, Cavid; Sennaroglu, Levent; Süslü, Nilda

    2015-07-01

    Intraoperative cerebrospinal fluid (CSF) leakages from the cochleostomy site - known as gushers - are a serious complication of cochlear implantation surgery in cases of congenital deafness. They occur as the result of abnormal communication between CSF in the internal auditory canal and perilymph in the cochlea. Gushers are well recognized as occurring in a proportion of cases in which there is a clearly visible congenital malformation of the cochlea. In this report, we describe two cases in which pre-operative computed tomography (CT) scanning of the cochlea was initially reported as normal but gushers occurred during cochlear implant surgery. In both cases, more detailed review of the CT scans (peroperatively in the first case, pre-operatively in the second case) showed a defect at the cochlear base, in the absence of any other cochlear malformation. The aim of this paper is to draw attention to the risk of missing this abnormality and to encourage careful inspection of the cochlear base on CT scans in all cases, even when the rest of the cochlear appears normal.

  19. Coding strategies for cochlear implants under adverse environments

    Science.gov (United States)

    Tahmina, Qudsia

    Cochlear implants are electronic prosthetic devices that restores partial hearing in patients with severe to profound hearing loss. Although most coding strategies have significantly improved the perception of speech in quite listening conditions, there remains limitations on speech perception under adverse environments such as in background noise, reverberation and band-limited channels, and we propose strategies that improve the intelligibility of speech transmitted over the telephone networks, reverberated speech and speech in the presence of background noise. For telephone processed speech, we propose to examine the effects of adding low-frequency and high- frequency information to the band-limited telephone speech. Four listening conditions were designed to simulate the receiving frequency characteristics of telephone handsets. Results indicated improvement in cochlear implant and bimodal listening when telephone speech was augmented with high frequency information and therefore this study provides support for design of algorithms to extend the bandwidth towards higher frequencies. The results also indicated added benefit from hearing aids for bimodal listeners in all four types of listening conditions. Speech understanding in acoustically reverberant environments is always a difficult task for hearing impaired listeners. Reverberated sounds consists of direct sound, early reflections and late reflections. Late reflections are known to be detrimental to speech intelligibility. In this study, we propose a reverberation suppression strategy based on spectral subtraction to suppress the reverberant energies from late reflections. Results from listening tests for two reverberant conditions (RT60 = 0.3s and 1.0s) indicated significant improvement when stimuli was processed with SS strategy. The proposed strategy operates with little to no prior information on the signal and the room characteristics and therefore, can potentially be implemented in real-time CI

  20. Toward automated cochlear implant insertion using tubular manipulators

    Science.gov (United States)

    Granna, Josephine; Rau, Thomas S.; Nguyen, Thien-Dang; Lenarz, Thomas; Majdani, Omid; Burgner-Kahrs, Jessica

    2016-03-01

    During manual cochlear implant electrode insertion the surgeon is at risk to damage the intracochlear fine-structure, as the electrode array is inserted through a small opening in the cochlea blindly with little force-feedback. This paper addresses a novel concept for cochlear electrode insertion using tubular manipulators to reduce risks of causing trauma during insertion and to automate the insertion process. We propose a tubular manipulator incorporated into the electrode array composed of an inner wire within a tube, both elastic and helically shaped. It is our vision to use this manipulator to actuate the initially straight electrode array during insertion into the cochlea by actuation of the wire and tube, i.e. translation and slight axial rotation. In this paper, we evaluate the geometry of the human cochlea in 22 patient datasets in order to derive design requirements for the manipulator. We propose an optimization algorithm to automatically determine the tube set parameters (curvature, torsion, diameter, length) for an ideal final position within the cochlea. To prove our concept, we demonstrate that insertion can be realized in a follow-the-leader fashion for 19 out of 22 cochleas. This is possible with only 4 different tube/wire sets.

  1. The cochlear implantation surgery: A review of anesthetic considerations and implications

    Directory of Open Access Journals (Sweden)

    Sukhminder Jit Singh Bajwa

    2013-01-01

    Full Text Available The advancement in the technology of the cochlear implants has resulted in increasing trend of cochlear implantation in both the children and elderly population. The anesthesiologist is faced with the task of smoothly conducting the surgery without any interference in the stimulation techniques used. The preoperative evaluation is mainly focused on the presence of any congenital anomalies in these patients which may affect anesthetic technique. The reduction of anxiety of the patient as well as the parents of small children is an important aspect of the preoperative visit. Intraoperatively the anesthetic technique chosen should not interfere with the stimulation of the cochlear implant electrode assembly. The postoperative management is mainly focused at prevention of agitation and good analgesia. A close cooperation between the surgeon and the anesthesiologist is essential for a positive outcome in this surgery. The current review focuses on the important anesthesia aspects related to cochlear implant surgery.

  2. Enhancement technology and outcomes: what professionals and researchers can learn from those skeptical about cochlear implants.

    Science.gov (United States)

    Kermit, Patrick

    2012-12-01

    This text presents an overview of the bioethical debate on pediatric cochlear implants and pays particular attention to the analysis of the Deaf critique of implantation. It dismisses the idea that Deaf concerns are primarily about the upholding of Deaf culture and sign language. Instead it is argued that Deaf skepticism about child rehabilitation after cochlear surgery is well founded. Many Deaf people have lived experiences as subjects undergoing rehabilitation. It is not the cochlear technology in itself they view as problematic, but rather the subsequent rehabilitation process. Because they themselves have experienced what they describe as harmful effects which relate above all to the idea of normalization, they have articulated worries for the new generations of deaf children in need of rehabilitation following cochlear implant surgery. These insights have attracted little attention, but could represent relevant ethical questions of which both practitioners and researchers in the field of implantation might be aware.

  3. Benefits of simultaneous bilateral cochlear implantation on verbal reasoning skills in prelingually deaf children

    NARCIS (Netherlands)

    Jacobs, Evi; Langereis, Margreet C.; Frijns, Johan H. M.; Free, Rolien H.; Goedegebure, Andre; Smits, Cas; Stokroos, Robert J.; Ariens-Meijer, Saskia A. M.; Mylanus, Emmanuel A. M.; Vermeulen, Anneke M.

    2016-01-01

    Background: Impaired auditory speech perception abilities in deaf children with hearing aids compromised their verbal intelligence enormously. The availability of unilateral cochlear implantation (Cl) auditory speech perception and spoken vocabulary enabled them to reach near ageappropriate levels.

  4. Use of Narrative-Based Language Intervention with Children who have Cochlear Implants

    Science.gov (United States)

    Justice, Ellie C.; Swanson, Lori A.; Buebler, Velvet

    2008-01-01

    A study was conducted to examine the use of narrative-based language intervention (NBLI) with 3 children who have cochlear implants. Findings reveal that NBLI is effective intervention to increase the narrative skills of children with specific language impairment.

  5. A phone-assistive device based on Bluetooth technology for cochlear implant users.

    Science.gov (United States)

    Qian, Haifeng; Loizou, Philipos C; Dorman, Michael F

    2003-09-01

    Hearing-impaired people, and particularly hearing-aid and cochlear-implant users, often have difficulty communicating over the telephone. The intelligibility of telephone speech is considerably lower than the intelligibility of face-to-face speech. This is partly because of lack of visual cues, limited telephone bandwidth, and background noise. In addition, cellphones may cause interference with the hearing aid or cochlear implant. To address these problems that hearing-impaired people experience with telephones, this paper proposes a wireless phone adapter that can be used to route the audio signal directly to the hearing aid or cochlear implant processor. This adapter is based on Bluetooth technology. The favorable features of this new wireless technology make the adapter superior to traditional assistive listening devices. A hardware prototype was built and software programs were written to implement the headset profile in the Bluetooth specification. Three cochlear implant users were tested with the proposed phone-adapter and reported good speech quality.

  6. Two Portuguese Cochlear Implanted Dizygotic Twins: A Case Report

    Directory of Open Access Journals (Sweden)

    Joana Rita Chora

    2012-01-01

    Full Text Available Individual’s hearing performance after cochlear implant (CI is variable and depends on different factors such as etiology of deafness, age at implantation, and social/family hearing environment. Here we report the case of dizygotic twins, boy and girl, presenting with neurosensorial profound deafness prior CI (age of implantation = 3.5 years old. Both parents have severe/profound deafness, since childhood, and use sign language as primary mode of communication. Clinical and genetic characterization was performed, as well as the assessment of the auditory and oral (rehabilitation after CI, applying a battery of audiological, speech, and language tests. The twin girl and the father were homozygous for the c.35delG mutation in the GJB2 gene, while the twin boy and the mother were compound heterozygotes, both monoallelic for c.35delG and for the deletion del(GJB6-D13S1830 in the GJB6 gene. The remaining hearing impaired relatives were c.35delG homozygotes. The genetic cause of deafness was thus identified in this family. Some noteworthy differences were observed regarding twins’ auditory and oral performance after CI. Subsequent follow-up of these children allowed us to conclude that those differences were most likely due to the different environment in which the twins have been living than to their different GJB2/GJB6 genotypes.

  7. Neurotrophic treatment of the degenerating auditory nerve; cochlear implants in deafened guinea pigs

    NARCIS (Netherlands)

    Agterberg, M.J.H.

    2009-01-01

    To date, the cochlear implant is the most successful sensorineural prosthesis. The device consists of a small array with a number of electrodes implanted in the cochlea of profoundly hearing impaired people. Some people with an implant are able to use the telephone. Unfortunately, others hardly bene

  8. Phonological Awareness, Vocabulary, and Reading in Deaf Children with Cochlear Implants

    Science.gov (United States)

    Johnson, Carol; Goswami, Usha

    2010-01-01

    Purpose: To explore the phonological awareness skills of deaf children with cochlear implants (CIs) and relationships with vocabulary and reading development. Method: Forty-three deaf children with implants who were between 5 and 15 years of age were tested; 21 had been implanted at around 2.5 years of age (Early CI group), and 22 had been…

  9. The Experiences of Deaf Young People with Sequential Bilateral Cochlear Implants

    Science.gov (United States)

    Mather, Julie; Gregory, Sue; Archbold, Sue

    2011-01-01

    Fifteen young people who had received sequential bilateral cochlear implants were interviewed about their experiences. The majority had become full-time users, and all found improvements in listening with the second implant, including those who did not continue to wear it. All would recommend sequential bilateral implantation to their peers. For…

  10. Communication, Psychosocial, and Educational Outcomes of Children with Cochlear Implants and Challenges Remaining for Professionals and Parents

    Directory of Open Access Journals (Sweden)

    Renée Punch

    2011-01-01

    Full Text Available This paper provides an overview and a synthesis of the findings of a large, multifaceted study investigating outcomes from paediatric cochlear implantation. The study included children implanted at several Australian implant clinics and attending a variety of early intervention and educational settings across a range of locations in eastern Australia. It investigated three major aspects of childhood cochlear implantation: (1 parental expectations of their children's implantation, (2 families' decision-making processes, and (3 the communication, social, and educational outcomes of cochlear implantation for deaf children. It employed a mixed-methods approach in which quantitative survey data were gathered from 247 parents and 151 teachers, and qualitative data from semistructured interviews with 27 parents, 15 teachers, and 11 children and adolescents with cochlear implants. The summarised findings highlight several areas where challenges remain for implant clinics, parents, and educators if children with cochlear implants are to reach their full potential personally, educationally, and socially.

  11. Cross-cultural adaptation and validation of the Nijmegen Cochlear Implant Questionnaire into Italian.

    Science.gov (United States)

    Ottaviani, F; Iacona, E; Sykopetrites, V; Schindler, A; Mozzanica, F

    2016-08-01

    The NCIQ is a quantifiable self-assessment health-related quality of life instrument specific for cochlear implant users. The aim of this study was to culturally adapt the NCIQ into Italian (I-NCIQ). A prospective instrument validation study was conducted. Cross-cultural adaptation and validation were accomplished. Cronbach α was used to test internal consistency in 51 CI users and in a control group composed by 38 post-lingual deaf adult on a waiting list for a CI. ICC test was used for test-retest reliability analysis. Kruskal-Wallis test with Mann-Whitney post hoc were used to compare the I-NCIQ scores in CI users before and after the cochlear implantation and in control patients. I-NCIQ scores obtained in CI users were compared with the results of Italian version of disyllabic testing without lip-reading and without masking. Good internal consistency and good test-retest reliability were found. I-NCIQ scores obtained in the 51 CI users after implantation were consistently higher than those obtained before implantation and in the control group. Moreover, no differences were found in the results of I-NCIQ obtained in the group of 51 CI users before implantation and in the group of control patients on post hoc Mann-Whitney analysis. Positive correlations between I-NCIQ scores and the results of disyllabic testing without lip-reading and without masking were found. The I-NCIQ is a reliable, valid, self-administered questionnaire for the measurement of QOL in CI users; its application is recommended.

  12. Influence of cochleostomy and cochlear implant insertion on drug gradients following intratympanic application in guinea pigs

    Science.gov (United States)

    King, EB; Hartsock, JJ; O'Leary, SJ; Salt, AN

    2013-01-01

    Locally-applied drugs can protect residual hearing following cochlear implantation. The influence of cochlear implantation on drug levels in scala tympani (ST) after round window application was investigated in guinea pigs using the marker trimethylphenlyammonium (TMPA) measured in real-time with TMPA-selective microelectrodes. TMPA concentration in the upper basal turn of ST rapidly increased during implantation and then declined due to cerebrospinal fluid entering ST at the cochlear aqueduct and exiting at the cochleostomy. The TMPA increase was found to be caused by the cochleostomy drilling, if the burr tip partially entered ST. TMPA distribution in the second turn was less affected by implantation procedures. These findings show that basal turn drug levels may be changed during implantation and the changes may need to be considered in the interpretation of therapeutic effects of drugs in conjunction with implantation. PMID:24008355

  13. Language acquisition after cochlear implantation of congenitally deaf children: Effect of age at implantation

    Science.gov (United States)

    Svirsky, Mario; Holt, Rachael

    2005-04-01

    Evidence shows that early implantation of congenitally deaf children is beneficial. However, infants as young as 6 months of age have started to receive cochlear implants (CIs) in the USA. Such early implantation may be associated with higher risks, including anesthetic risk as well as the increased possibility of a false positive in the diagnosis of profound deafness. On the other hand, delaying implantation may be associated with the risk of missing windows of opportunity or sensitive periods for the development of communication skills. In this study, speech perception and language skills in children who received CIs in the first, second, third, or fourth year of life were compared. Participants were tested at regular 6-month intervals after implantation. The effects of several potential confounds were considered. In general, children implanted earlier outperformed those implanted later, with one exception: infants implanted at 6-12 months showed similar outcomes to children implanted at 12-24 months, at least through 2 to 2-1/2 years of age. This preliminary result may be associated with the difficulty of choosing appropriate stimulation parameters for infants, and its potential influence on the quality of the stimulation patterns delivered by the CI.

  14. Perceptually optimized gain function for cochlear implant signal-to-noise ratio based noise reduction.

    Science.gov (United States)

    Mauger, Stefan J; Dawson, Pam W; Hersbach, Adam A

    2012-01-01

    Noise reduction in cochlear implants has achieved significant speech perception improvements through spectral subtraction and signal-to-noise ratio based noise reduction techniques. Current methods use gain functions derived through mathematical optimization or motivated by normal listening psychoacoustic experiments. Although these gain functions have been able to improve speech perception, recent studies have indicated that they are not optimal for cochlear implant noise reduction. This study systematically investigates cochlear implant recipients' speech perception and listening preference of noise reduction with a range of gain functions. Results suggest an advantageous gain function and show that gain functions currently used for noise reduction are not optimal for cochlear implant recipients. Using the cochlear implant optimised gain function, a 27% improvement over the current advanced combination encoder (ACE) stimulation strategy in speech weighted noise and a 7% improvement over current noise reduction strategies were observed in babble noise conditions. The optimized gain function was also most preferred by cochlear implant recipients. The CI specific gain function derived from this study can be easily incorporated into existing noise reduction strategies, to further improve listening performance for CI recipients in challenging environments.

  15. Focused tight dressing does not prevent cochlear implant magnet migration under 1.5 Tesla MRI.

    Science.gov (United States)

    Cuda, D; Murri, A; Succo, G

    2013-04-01

    We report a retrospective case of inner magnet migration, which occurred after 1.5 Tesla MRI scanning in an adult recipient of a bilateral cochlear implant (CI) despite a focused head dressing. The patient, bilaterally implanted with Nucleus 5 CIs (Cochlear LTD, Sydney, Australia), underwent a 1.5 Tesla cholangio-MRI scan for biliary duct pathology. In subsequent days, a focal skin alteration appeared over the left inner coil. Plain skull radiographs showed partial magnet migration on the left side. Surgical exploration confirmed magnet twisting; the magnet was effectively repositioned. Left CI performance was restored to pre-migration level. The wound healed without complications. Thus, focused dressing does not prevent magnet migration in CI recipients undergoing 1.5 Tesla MRI. All patients should be counselled on this potential complication. A minor surgical procedure is required to reposition the magnet. Nevertheless, timely diagnosis is necessary to prevent skin breakdown and subsequent device contamination. Plain skull radiograph is very effective in identifying magnet twisting; it should be performed systematically after MRI or minimally on all suspected cases.

  16. [Improving speech comprehension using a new cochlear implant speech processor].

    Science.gov (United States)

    Müller-Deile, J; Kortmann, T; Hoppe, U; Hessel, H; Morsnowski, A

    2009-06-01

    The aim of this multicenter clinical field study was to assess the benefits of the new Freedom 24 sound processor for cochlear implant (CI) users implanted with the Nucleus 24 cochlear implant system. The study included 48 postlingually profoundly deaf experienced CI users who demonstrated speech comprehension performance with their current speech processor on the Oldenburg sentence test (OLSA) in quiet conditions of at least 80% correct scores and who were able to perform adaptive speech threshold testing using the OLSA in noisy conditions. Following baseline measures of speech comprehension performance with their current speech processor, subjects were upgraded to the Freedom 24 speech processor. After a take-home trial period of at least 2 weeks, subject performance was evaluated by measuring the speech reception threshold with the Freiburg multisyllabic word test and speech intelligibility with the Freiburg monosyllabic word test at 50 dB and 70 dB in the sound field. The results demonstrated highly significant benefits for speech comprehension with the new speech processor. Significant benefits for speech comprehension were also demonstrated with the new speech processor when tested in competing background noise.In contrast, use of the Abbreviated Profile of Hearing Aid Benefit (APHAB) did not prove to be a suitably sensitive assessment tool for comparative subjective self-assessment of hearing benefits with each processor. Use of the preprocessing algorithm known as adaptive dynamic range optimization (ADRO) in the Freedom 24 led to additional improvements over the standard upgrade map for speech comprehension in quiet and showed equivalent performance in noise. Through use of the preprocessing beam-forming algorithm BEAM, subjects demonstrated a highly significant improved signal-to-noise ratio for speech comprehension thresholds (i.e., signal-to-noise ratio for 50% speech comprehension scores) when tested with an adaptive procedure using the Oldenburg

  17. Social Media Utilization in the Cochlear Implant Community

    Science.gov (United States)

    Saxena, Rajeev C.; Lehmann, Ashton E.; Hight, A. Ed; Darrow, Keith; Remenschneider, Aaron; Kozin, Elliott D.; Lee, Daniel J.

    2015-01-01

    Background More than 200,000 individuals worldwide have received a cochlear implant (CI). Social media Websites may provide a paramedical community for those who possess or are interested in a CI. The utilization patterns of social media by the CI community, however, have not been thoroughly investigated. Purpose The purpose of this study was to investigate participation of the CI community in social media Websites. Research Design We conducted a systematic survey of online CI-related social media sources. Using standard search engines, the search terms cochlear implant, auditory implant, forum, and blog identified relevant social media platforms and Websites. Social media participation was quantified by indices of membership and posts. Study Sample Social media sources included Facebook, Twitter, YouTube, blogs, and online forums. Each source was assigned one of six functional categories based on its description. Intervention No intervention was performed. Data Collection and Analysis We conducted all online searches in February 2014. Total counts of each CI-related social media source were summed, and descriptive statistics were calculated. Results More than 350 sources were identified, including 60 Facebook groups, 36 Facebook pages, 48 Twitter accounts, 121 YouTube videos, 13 forums, and 95 blogs. The most active online communities were Twitter accounts, which totaled 35,577 members, and Facebook groups, which totaled 17,971 members. CI users participated in Facebook groups primarily for general information/support (68%). Online forums were the next most active online communities by membership. The largest forum contained approximately 9,500 topics with roughly 127,000 posts. CI users primarily shared personal stories through blogs (92%), Twitter (71%), and YouTube (62%). Conclusions The CI community engages in the use of a wide range of online social media sources. The CI community uses social media for support, advocacy, rehabilitation information, research

  18. Concept formation skills in long-term cochlear implant users.

    Science.gov (United States)

    Castellanos, Irina; Kronenberger, William G; Beer, Jessica; Colson, Bethany G; Henning, Shirley C; Ditmars, Allison; Pisoni, David B

    2015-01-01

    This study investigated if a period of auditory sensory deprivation followed by degraded auditory input and related language delays affects visual concept formation skills in long-term prelingually deaf cochlear implant (CI) users. We also examined if concept formation skills are mediated or moderated by other neurocognitive domains (i.e., language, working memory, and executive control). Relative to normally hearing (NH) peers, CI users displayed significantly poorer performance in several specific areas of concept formation, especially when multiple comparisons and relational concepts were components of the task. Differences in concept formation between CI users and NH peers were fully explained by differences in language and inhibition-concentration skills. Language skills were also found to be more strongly related to concept formation in CI users than in NH peers. The present findings suggest that complex relational concepts may be adversely affected by a period of early prelingual deafness followed by access to underspecified and degraded sound patterns and spoken language transmitted by a CI. Investigating a unique clinical population such as early-implanted prelingually deaf children with CIs can provide new insights into foundational brain-behavior relations and developmental processes.

  19. CT and MR imaging for pediatric cochlear implantation: emphasis on the relationship between the cochlear nerve canal and the cochlear nerve

    Energy Technology Data Exchange (ETDEWEB)

    Miyasaka, Mikiko; Nosaka, Shunsuke; Masaki, Hidekazu [National Center for Child Health and Development, Department of Radiology, Tokyo (Japan); Morimoto, Noriko; Taiji, Hidenobu [National Center for Child Health and Development, Department of Otolaryngology, Tokyo (Japan)

    2010-09-15

    Cochlear implantation has become an accepted treatment for deafness. As the frequency of cochlear implantation has increased, requests for images have also increased in the work-up for candidates. An absent cochlear nerve (CN) is a contraindication to cochlear implantation. Therefore, MRI is performed to evaluate the CN in patients with sensorineural hearing loss. Recently, some authors have reported the relationship between cochlear nerve canal (CNC) stenosis and CN hypoplasia. To review the relationship between CNC and CN. During a period of 78 months, 21 children (42 ears) with unilateral or bilateral sensorineural hearing loss underwent both HRCT and MRI of the cochlear nerve. We retrospectively reviewed two factors: the evaluation of inner ear malformations and the relationship between CNC stenosis and CN hypoplasia. Inner ear malformations were recognized in ten ears. The mean CNC diameter was approximately 2 mm (ranging from 0.6 to 2.7 mm). CN hypoplasia was seen in eight of the 42 ears; all eight were associated with CNC stenosis ({<=}1.5 mm). Of the 34 ears with normal CN, 32 had CNC >1.5 mm in diameter and the remaining two ears, with incomplete partition type I, had CNC stenosis. Children with CNC stenosis had a high incidence of CN hypoplasia. CNC stenosis ({<=}1.5 mm) suggests CN hypoplasia. On the other hand, CN hypoplasia was not seen in children with CNC diameter >1.5 mm. Therefore, we conclude that children with CNC stenosis or malformations on HRCT should receive MR imaging of the CN. (orig.)

  20. Sirviendo a los estudiantes sordos que tienen Los implantes cocleares. Hoja de consejos de PEPNet (Serving Deaf Students Who Have Cochlear Implants. PEPNet Tipsheet)

    Science.gov (United States)

    Clark, Catherine

    2010-01-01

    This version of "Serving Deaf Students Who Have Cochlear Implants. PEPNet Tipsheet," written in Spanish, describes how cochlear implants (CIs) work. CIs are complex electronic devices surgically implanted under the skin behind the ear. These devices utilize electrodes placed in the inner ear (the cochlea) to stimulate the auditory nerve of…

  1. Cochlear Implantation in Patients with Neurofibromatosis Type 2 and Patients with Vestibular Schwannoma in the Only Hearing Ear

    Directory of Open Access Journals (Sweden)

    Erika Celis-Aguilar

    2012-01-01

    Full Text Available Cochlear implants are a new surgical option in the hearing rehabilitation of patients with neurofibromatosis type 2 (NF2 and patients with vestibular schwannoma (VS in the only hearing ear. Auditory brainstem implant (ABI has been the standard surgical treatment for these patients. We performed a literature review of patients with NF2 and patients with VS in the only hearing ear. Cochlear implantation (CI provided some auditory benefit in all patients. Preservation of cochlear nerve integrity is crucial after VS resection. Results ranged from environmental sound awareness to excellent benefit with telephone use. Promontory stimulation is recommended although not crucial. MRI can be performed safely in cochlear implanted patients.

  2. Reliability of Med-El Cochlear Implants in children. The Romania Experience.

    Directory of Open Access Journals (Sweden)

    Eugen Horatiu Stefanescu

    2016-07-01

    Full Text Available Introduction: Early detection of hearing loss significantly lowered the age of cochlear implantation. A failed CI is a very problematic issue for the child and family and seems to be, for the moment, inevitable. This is a retrospective review aimed to evaluate the reliability of Med-El devices implanted in children in Romania. Materials and Methods: We designed a questionnaire to assess the incidence, the time elapsed and the reason of total device failure. Medical-surgical data were collected from children who received Med-El cochlear implants since the start of the National Cochlear Implant Program in 2001. Results: There were 256 patients included. Failure Rate (6,64% and Cumulative Survival Rate (95,31% at 5 years were calculated. The majority of the hard and soft failures were encountered in Pulsar devices. Flap necrosis was the most frequent medical/surgical reason for re-plantation. There was only one case of posttraumatic device failure. Time elapsed to device failure was short – 22 months on average. Conclusion: Cochlear implant reliability data should be considered during the choice of an implant for each individual patient. This study confirms the safety and efficacy of Med-El cochlear implants in children for both ceramic and non-ceramic devices.

  3. Normative findings of electrically evoked compound action potential measurements using the neural response telemetry of the Nucleus CI24M cochlear implant system.

    NARCIS (Netherlands)

    Cafarelli-Dees, D.; Dillier, N.; Lai, W.K.; Wallenberg, E. von; Dijk, B. van; Akdas, F.; Aksit, M.; Batman, C.; Beynon, A.J.; Burdo, S.; Chanal, J.M.; Collet, L.; Conway, M.; Coudert, C.; Craddock, L.; Cullington, H.; Deggouj, N.; Fraysse, B.; Grabel, S.; Kiefer, J.; Kiss, J.G.; Lenarz, T.; Mair, A.; Maune, S.; Muller-Deile, J.; Piron, J.P.; Razza, S.; Tasche, C.; Thai-Van, H.; Toth, F.; Truy, E.; Uziel, A.; Smoorenburg, G.F.

    2005-01-01

    One hundred and forty-seven adult recipients of the Nucleus 24 cochlear implant system, from 13 different European countries, were tested using neural response telemetry to measure the electrically evoked compound action potential (ECAP), according to a standardised postoperative measurement procedu

  4. Cochlear Implantation through the Middle Fossa Approach: A Review of Related Temporal Bone Studies and Reported Cases.

    Science.gov (United States)

    Lesser, Juan Carlos Cisneros; Brito Neto, Rubens Vuono de; Martins, Graziela de Souza Queiroz; Bento, Ricardo Ferreira

    2017-01-01

    Introduction Middle fossa approach has been suggested as an alternative for patients in whom other routes of electrode insertion are contraindicated. Even though there are temporal bone studies about the feasibility of introducing the cochlear implant through the middle fossa, until now, very few studies have described results when cochlear implant surgery is done through this approach. Objective The objective of this study is to review a series of temporal bone studies related to cochlear implantation through the middle fossa and the results obtained by different surgical groups after cochlear implantation through this approach. Data Sources PubMed, MD consult and Ovid-SP databases. Data Synthesis A total of 8 human cadaveric temporal bone studies and 6 studies reporting cochlear implant surgery through the middle fossa approach met the inclusion criteria. Temporal bone studies show that it is feasible to perform cochlear implantation through this route. So far, only two surgical groups have performed cochlear implantation through the middle fossa with a total of 15 implanted patients. One group entered the cochlea in the most upper part of the basal turn, inserting the implant in the direction of the middle and apical turns; meanwhile, the other group inserted the implant in the apical turn directed in a retrograde fashion to the middle and basal turns. Results obtained in both groups were similar. Conclusions The middle fossa approach is a good alternative for cochlear implantation when other routes of electrode insertion are contraindicated.

  5. Changes in tinnitus after cochlear implantation and its relation with psychological functioning.

    Science.gov (United States)

    Kloostra, Francka J J; Arnold, Rosemarie; Hofman, Rutger; Van Dijk, Pim

    2015-01-01

    This study retrospectively assessed the prevalence of tinnitus in cochlear implant patients and the changes after implantation in 212 patients implanted between 2000 and 2009. Patients were included at least 6 months after implantation and received 2 sets of questionnaires, one about the situation before implantation and one about the situation after implantation. Mostly standardized questionnaires assessed tinnitus handicap (Tinnitus Handicap Inventory, THI, and Tinnitus Handicap Questionnaire, THQ), tinnitus characteristics, hearing loss (Abbreviated Profile of Hearing Aid Benefit) and anxiety/depression (Hospital Anxiety and Depression Scale). Of the approached patients, 117 completed the full sets of questionnaires and 35 completed a short version. Preoperative tinnitus was reported by 51.3% of these patients, of which 55.6% reported a reduction or cessation of their tinnitus after implantation. However, 8.2% of the patients with tinnitus reported a postoperative deterioration of their tinnitus. In addition, among the patients without preoperative tinnitus, 19.6% reported the start of tinnitus after implantation. The self-reported change of tinnitus correlated with the pre- and postoperative scores on the THI and THQ. The THQ showed slightly more changes in scores after cochlear implantation compared to the THI. Overall hearing handicap and feelings of anxiety and depression decreased after implantation. In conclusion, tinnitus is reduced after cochlear implantation in an important part of the patients, but in a small part implantation has a negative effect on tinnitus. When tinnitus starts after implantation, the tinnitus handicap is mild.

  6. Narrative spoken language skills in severely hearing impaired school-aged children with cochlear implants.

    Science.gov (United States)

    Boons, Tinne; De Raeve, Leo; Langereis, Margreet; Peeraer, Louis; Wouters, Jan; van Wieringen, Astrid

    2013-11-01

    Cochlear implants have a significant positive effect on spoken language development in severely hearing impaired children. Previous work in this population has focused mostly on the emergence of early-developing language skills, such as vocabulary. The current study aims at comparing narratives, which are more complex and later-developing spoken language skills, of a contemporary group of profoundly deaf school-aged children using cochlear implants (n=66, median age=8 years 3 months) with matched normal hearing peers. Results show that children with cochlear implants demonstrate good results on quantity and coherence of the utterances, but problematic outcomes on quality, content and efficiency of retold stories. However, for a subgroup (n=20, median age=8 years 1 month) of deaf children without additional disabilities who receive cochlear implantation before the age of 2 years, use two implants, and are raised with one spoken language, age-adequate spoken narrative skills at school-age are feasible. This is the first study to set the goals regarding spoken narrative skills for deaf children using cochlear implants.

  7. European multi-centre study of the Nucleus Hybrid L24 cochlear implant

    NARCIS (Netherlands)

    Lenarz, T.; James, C.; Cuda, D.; O'Connor, A.; Frachet, B.; Frijns, J.H.; Klenzner, T.; Laszig, R.; Manrique, M.; Marx, M.; Merkus, P.; Mylanus, E.A.M.; Offeciers, E.; Pesch, J.; Ramos-Macias, A.; Robier, A.; Sterkers, O.; Uziel, A.

    2013-01-01

    OBJECTIVES: To investigate the preservation of residual hearing in subjects who received the Nucleus Hybrid L24 cochlear implant. To investigate the performance benefits up to one year post-implantation in terms of speech recognition, sound quality, and quality of life. DESIGN: Prospective, with seq

  8. Reading and Spelling Abilities of Deaf Adolescents with Cochlear Implants and Hearing Aids

    Science.gov (United States)

    Harris, Margaret; Terlektsi, Emmanouela

    2011-01-01

    A total of 86 deaf children aged between 12 and 16 years were recruited from schools for the deaf, specialist units attached to a school, and mainstream schools. Approximately one-third used hearing aids, one-third had received a cochlear implant before 42 months, and one-third had been implanted later. The 3 subgroups were matched for age and…

  9. Great Expectations: Perspectives on Cochlear Implantation of Deaf Children in Norway

    Science.gov (United States)

    Simonsen, Eva; Kristoffersen, Ann-Elise; Hyde, Mervyn B.; Hjulstad, Oddvar

    2009-01-01

    The authors describe the use of cochlear implants with deaf children in Norway and examine how this intervention has raised new expectations and some tensions concerning the future of education for deaf students. They report on two studies of communication within school learning environments of young children with implants in Norwegian preschools…

  10. Deaf Young People with Sequential Bilateral Cochlear Implants: The Experience of Parents and Teachers

    Science.gov (United States)

    Mather, Julie; Archbold, Sue; Gregory, Sue

    2011-01-01

    A semi-structured interview format was used to explore the experiences and attitudes of twelve parents and twelve teachers of young people, aged 11-18 years, who had received sequential bilateral cochlear implants. The parents stressed the importance of involving the young person in the decision to go ahead with the second implant. Although all…

  11. Clinical Review of Cochlear Implantation Performed at Sapporo Medical University Hospital.

    Science.gov (United States)

    Ogasawara, Noriko; Takano, Kenichi; Shintani, Tomoko; Saikawa, Etsuko; Takahashi, Nozomi; Ito, Fumie; Himi, Tetsuo

    2016-01-01

    More than 20 years have passed since cochlear implantation (CI) was first introduced in Japan. We began CI at the Sapporo Medical University Hospital in 1988; since then, up to the first half of 2015, we have performed CI on 280 ears. In patients aged less than and those aged over 18 years, 121 and 159 ears, respectively, have undergone surgery. This report presents typical cases of CI, such as an adult case, a bilateral case, a case where both hearing and vision were impaired, a pediatric case, a case with multiple handicaps, a case with a genetic mutation leading to severe hearing loss, and a complicated case. In addition, complications with CI cases experienced during extended follow-up periods are also summarized.

  12. Experience with cochlear implants in Greenlanders with profound hearing loss living in Greenland

    DEFF Research Database (Denmark)

    Homøe, Preben; Andersen, Ture; Grøntved, Aksel

    2013-01-01

    intervention. The logistics and lack of availability of speech therapists in Greenland hampers possibilities for optimal language and speech therapy of CI patients in Greenland. This study aims at describing the results of CI treatment in Greenlanders and the outcome of the CI operations along......OBJECTIVE: Cochlear implant (CI) treatment was introduced to the world in the 1980s and has become a routine treatment for congenital or acquired severe-to-profound hearing loss. CI treatment requires access to a highly skilled team of ear, nose and throat specialists, audiologists and speech...... auditory and speech training. Six children attend mainstream public school while one child is in kindergarten. Of the adults, only 1 has achieved good speech perception with full-time use of CI while 3 do not use the CI. DISCUSSION: From an epidemiological point of view, approximately 1-3 children below 6...

  13. Audiotactile interaction can change over time in cochlear implant users

    Directory of Open Access Journals (Sweden)

    Simon Pierre Landry

    2014-05-01

    Full Text Available Recent results suggest that audiotactile interactions are disturbed in cochlear implant (CI users. However, further exploration regarding the factors responsible for such abnormal sensory processing is still required. Considering the temporal nature of a previously used multisensory task, it remains unclear whether any aberrant results were caused by the specificity of the interaction studied or rather if it reflects an overall abnormal interaction. Moreover, although duration of experience with a CI has often been linked with the recovery of auditory functions, its impact on multisensory performance remains uncertain. In the present study, we used the parchment-skin illusion, a robust illustration of sound-biased perception of touch based on changes in auditory frequencies, to investigate the specificities of audiotactile interactions in CI users. Whereas individuals with relatively little experience with the CI performed similarly to the control group, experienced CI users showed a significantly greater illusory percept. The overall results suggest that despite being able to ignore auditory distractors in a temporal audiotactile task, CI users develop to become greatly influenced by auditory input in a spectral audiotactile task. When considered with the existing body of research, these results confirm that normal sensory interaction processing can be compromised in CI users.

  14. Sparse Nonnegative Matrix Factorization Strategy for Cochlear Implants

    Directory of Open Access Journals (Sweden)

    Hongmei Hu

    2015-12-01

    Full Text Available Current cochlear implant (CI strategies carry speech information via the waveform envelope in frequency subbands. CIs require efficient speech processing to maximize information transfer to the brain, especially in background noise, where the speech envelope is not robust to noise interference. In such conditions, the envelope, after decomposition into frequency bands, may be enhanced by sparse transformations, such as nonnegative matrix factorization (NMF. Here, a novel CI processing algorithm is described, which works by applying NMF to the envelope matrix (envelopogram of 22 frequency channels in order to improve performance in noisy environments. It is evaluated for speech in eight-talker babble noise. The critical sparsity constraint parameter was first tuned using objective measures and then evaluated with subjective speech perception experiments for both normal hearing and CI subjects. Results from vocoder simulations with 10 normal hearing subjects showed that the algorithm significantly enhances speech intelligibility with the selected sparsity constraints. Results from eight CI subjects showed no significant overall improvement compared with the standard advanced combination encoder algorithm, but a trend toward improvement of word identification of about 10 percentage points at +15 dB signal-to-noise ratio (SNR was observed in the eight CI subjects. Additionally, a considerable reduction of the spread of speech perception performance from 40% to 93% for advanced combination encoder to 80% to 100% for the suggested NMF coding strategy was observed.

  15. Emotional Perception of Music in Children with Unilateral Cochlear Implants

    Directory of Open Access Journals (Sweden)

    Sareh Shirvani

    2014-10-01

    Full Text Available Introduction: Cochlear implantation (CI improves language skills among children with hearing loss. However, children with CIs still fall short of fulfilling some other needs, including musical perception. This is often attributed to the biological, technological, and acoustic limitations of CIs. Emotions play a key role in the understanding and enjoyment of music. The present study aimed to investigate the emotional perception of music in children with bilaterally severe-to-profound hearing loss and unilateral CIs.   Materials and Methods: Twenty-five children with congenital severe-to-profound hearing loss and unilateral CIs and 30 children with normal hearing participated in the study. The children’s emotional perceptions of music, as defined by Peretz (1998, were measured. Children were instructed to indicate happy or sad feelings fostered in them by the music by pointing to pictures of faces showing these emotions.   Results: Children with CI obtained significantly lower scores than children with normal hearing, for both happy and sad items of music as well as in overall test scores (P

  16. Perception of Sung Speech in Bimodal Cochlear Implant Users

    Science.gov (United States)

    Galvin, John J.; Fu, Qian-Jie

    2016-01-01

    Combined use of a hearing aid (HA) and cochlear implant (CI) has been shown to improve CI users’ speech and music performance. However, different hearing devices, test stimuli, and listening tasks may interact and obscure bimodal benefits. In this study, speech and music perception were measured in bimodal listeners for CI-only, HA-only, and CI + HA conditions, using the Sung Speech Corpus, a database of monosyllabic words produced at different fundamental frequencies. Sentence recognition was measured using sung speech in which pitch was held constant or varied across words, as well as for spoken speech. Melodic contour identification (MCI) was measured using sung speech in which the words were held constant or varied across notes. Results showed that sentence recognition was poorer with sung speech relative to spoken, with little difference between sung speech with a constant or variable pitch; mean performance was better with CI-only relative to HA-only, and best with CI + HA. MCI performance was better with constant words versus variable words; mean performance was better with HA-only than with CI-only and was best with CI + HA. Relative to CI-only, a strong bimodal benefit was observed for speech and music perception. Relative to the better ear, bimodal benefits remained strong for sentence recognition but were marginal for MCI. While variations in pitch and timbre may negatively affect CI users’ speech and music perception, bimodal listening may partially compensate for these deficits. PMID:27837051

  17. Sparse Nonnegative Matrix Factorization Strategy for Cochlear Implants.

    Science.gov (United States)

    Hu, Hongmei; Lutman, Mark E; Ewert, Stephan D; Li, Guoping; Bleeck, Stefan

    2015-12-30

    Current cochlear implant (CI) strategies carry speech information via the waveform envelope in frequency subbands. CIs require efficient speech processing to maximize information transfer to the brain, especially in background noise, where the speech envelope is not robust to noise interference. In such conditions, the envelope, after decomposition into frequency bands, may be enhanced by sparse transformations, such as nonnegative matrix factorization (NMF). Here, a novel CI processing algorithm is described, which works by applying NMF to the envelope matrix (envelopogram) of 22 frequency channels in order to improve performance in noisy environments. It is evaluated for speech in eight-talker babble noise. The critical sparsity constraint parameter was first tuned using objective measures and then evaluated with subjective speech perception experiments for both normal hearing and CI subjects. Results from vocoder simulations with 10 normal hearing subjects showed that the algorithm significantly enhances speech intelligibility with the selected sparsity constraints. Results from eight CI subjects showed no significant overall improvement compared with the standard advanced combination encoder algorithm, but a trend toward improvement of word identification of about 10 percentage points at +15 dB signal-to-noise ratio (SNR) was observed in the eight CI subjects. Additionally, a considerable reduction of the spread of speech perception performance from 40% to 93% for advanced combination encoder to 80% to 100% for the suggested NMF coding strategy was observed.

  18. Technological, biological, and acoustical constraints to music perception in cochlear implant users.

    Science.gov (United States)

    Limb, Charles J; Roy, Alexis T

    2014-02-01

    Despite advances in technology, the ability to perceive music remains limited for many cochlear implant users. This paper reviews the technological, biological, and acoustical constraints that make music an especially challenging stimulus for cochlear implant users, while highlighting recent research efforts to overcome these shortcomings. The limitations of cochlear implant devices, which have been optimized for speech comprehension, become evident when applied to music, particularly with regards to inadequate spectral, fine-temporal, and dynamic range representation. Beyond the impoverished information transmitted by the device itself, both peripheral and central auditory nervous system deficits are seen in the presence of sensorineural hearing loss, such as auditory nerve degeneration and abnormal auditory cortex activation. These technological and biological constraints to effective music perception are further compounded by the complexity of the acoustical features of music itself that require the perceptual integration of varying rhythmic, melodic, harmonic, and timbral elements of sound. Cochlear implant users not only have difficulty perceiving spectral components individually (leading to fundamental disruptions in perception of pitch, melody, and harmony) but also display deficits with higher perceptual integration tasks required for music perception, such as auditory stream segregation. Despite these current limitations, focused musical training programs, new assessment methods, and improvements in the representation and transmission of the complex acoustical features of music through technological innovation offer the potential for significant advancements in cochlear implant-mediated music perception.

  19. Choosing which ear to implant in adult candidates with functional residual hearing.

    Science.gov (United States)

    Fielden, Claire A; Mehta, Rajnikant L; Kitterick, Pádraig T

    2016-04-01

    This study examined whether audiologists consider the potential benefits of contralateral hearing aid use following cochlear implantation when recommending which ear to implant in UK adult candidates with residual hearing. Thirty-four audiologists from providers of adult implantation services completed a decision-choice experiment. Clinicians were willing to consider recommending that the poorer ear be implanted, provided it had been aided continuously, suggesting that their decision making seeks to preserve access to residual hearing in the non-implanted ear where possible. Future approaches to determining candidacy should therefore consider that a sub-set of patients may obtain additional benefit from this residual hearing following implantation.

  20. Cochlear implant insertion forces in microdissected human cochlea to evaluate a prototype array.

    Science.gov (United States)

    Nguyen, Yann; Miroir, Mathieu; Kazmitcheff, Guillaume; Sutter, Jasmine; Bensidhoum, Morad; Ferrary, Evelyne; Sterkers, Olivier; Bozorg Grayeli, Alexis

    2012-01-01

    Cochlear implant array insertion forces are potentially related to cochlear trauma. We compared these forces between a standard (Digisonic SP; Neurelec, Vallauris, France) and an array prototype (Neurelec) with a smaller diameter. The arrays were inserted by a mechatronic tool in 23 dissected human cochlea specimens exposing the basilar membrane. The array progression under the basilar membrane was filmed together with dynamic force measurements. Insertion force profiles and depth of insertion were compared. The recordings showed lower insertion forces beyond 270° of insertion and deeper insertions with the thin prototype array. This will potentially allow larger cochlear coverage with less trauma.

  1. Pediatric cochlear implants in prelingual deafness: medium and long-term outcomes.

    Science.gov (United States)

    Kaplan, Daniel M; Puterman, Moshe

    2010-02-01

    Unfortunately, no large-scale, well-designed, comprehensive studies on medium and long-term effect of cochlear implants in prelingual children exist. Furthermore, the few studies listed have addressed different aspects of this issue, in a non-standardized manner. With the question of outcomes becoming so important in modern medicine, standardized reporting methods are essential. This would enable a fair comparison between the different commercial devices and between rehabilitation-education methods. The studies presented above were published between 1999 and 2008. Due to the long follow-up period required for reporting medium and long-term outcomes, they actually represent patients implanted one and two decades ago. At present and in the near future, we may expect better results from patients who were implanted in the last few years for several reasons: a) superior cochlear implants with better coding strategies; b) developments in rehabilitation and higher awareness among parents and staff; c) better health care and universal screening programs, leading to implants being performed in an earlier age; and d) a high rate of performing bilateral cochlear implants (either simultaneously or sequentially) in the last decade, which accomplishes even better results compared to unilateral implants. From the studies reviewed above, mainstreaming the child who has auditory-verbal and oral communication is the preferred educational setting for maximizing the medium and long-term benefit from a cochlear implant. Hearing and speech skills continue to improve many years after the implant. Non-use and failure rates (as reported by the authors from the medical centers and not solely by the cochlear implant manufacturers) are low, ranging from 1% to 2.7% per year. Overall, patients have a high rate of employment, close to that of the general population. However, they may be less satisfied, as the individual and the parents may feel compromised by their communication skills.

  2. Productivity of lexical categories in French-speaking children with cochlear implants.

    Science.gov (United States)

    Le Normand, M-T; Ouellet, C; Cohen, H

    2003-11-01

    The productivity of lexical categories was studied longitudinally in a sample of 17 young hearing-impaired French-speaking children with cochlear implants. Age of implantation ranged from 22 months to 76 months. Spontaneous speech samples were collected at six-month intervals over a period of 36 months, starting at the one-word stage. Four general measures of their linguistic production (number of utterances, verbal fluency, vocabulary, and grammatical production) as well as 36 specific lexical categories, according to the CHILDES codes, were computed in terms of tokens, i.e., total number of words. Cochlear-implanted children (CI) were compared to a French database of normally hearing children aged 2-4 compiled by the first author. Follow-up results indicate that, at the two-year post-implantation follow-up, noun, and verb morphology was significantly impaired. At the three-year follow-up, the cochlear-implanted group had recovered on adjectives, determiners and nouns, main verbs, and auxiliaries. The two groups differed significantly in processing locative adverbs, prepositions, pronouns, and verbs (infinitive verb, modal, and modal lexical), but individual variability within the cochlear-implanted group was substantial. Results are discussed in terms of recovery and developmental trends and variability in the acquisition of lexical categories by French children two years and three years post-implantation.

  3. Exploring the Discourse on Communication Modality after Cochlear Implantation: A Foucauldian Analysis of Parents' Narratives

    Science.gov (United States)

    Bruin, Marieke; Nevøy, Anne

    2014-01-01

    After pediatric cochlear implantation, parents have to make decisions concerning which communication modality the child and the child's family will use. The choice has to be made against a background of opposing views on communication modality in follow-up after pediatric cochlear implantation. The opposing views form a discourse that has…

  4. The Role of Subtotal Petrosectomy in Cochlear Implant Surgery-A Report of 32 Cases and Review on Indications

    NARCIS (Netherlands)

    Free, Rolien H.; Falcioni, Maurizio; Di Trapani, Giuseppe; Giannuzzi, Anna Lisa; Russo, Alessandra; Sanna, Mario

    2013-01-01

    Objective: To report and review 32 cases of subtotal petrosectomy (SP) in cochlear implant (CI) surgery and to define the indications and contraindications for this procedure Study Design: Retrospective case review + case reports. Setting: Tertiary skull base center. Patients: Cochlear implant datab

  5. The Effectiveness of Bilateral Cochlear Implants for Severe-to-Profound Deafness in Children : A Systematic Review

    NARCIS (Netherlands)

    Sparreboom, Marloes; van Schoonhoven, Jelmer; van Zanten, Bert G. A.; Scholten, Rob J. P. M.; Mylanus, Emmanuel A. M.; Grolman, Wilko; Maat, Bert

    2010-01-01

    Objective: To assess the clinical effectiveness of bilateral cochlear implantation compared with unilateral cochlear implantation alone or with a contralateral hearing aid (bimodal stimulation), in children with severe-to-profound hearing loss. Recently, the National Institute for Health and Clinica

  6. Deficits in the pitch sensitivity of cochlear-implanted children speaking English or Mandarin.

    Science.gov (United States)

    Deroche, Mickael L D; Lu, Hui-Ping; Limb, Charles J; Lin, Yung-Song; Chatterjee, Monita

    2014-01-01

    Sensitivity to complex pitch is notoriously poor in adults with cochlear implants (CIs), but it is unclear whether this is true for children with CIs. Many are implanted today at a very young age, and factors related to brain plasticity (age at implantation, duration of CI experience, and speaking a tonal language) might have strong influences on pitch sensitivity. School-aged children participated, speaking English or Mandarin, having normal hearing (NH) or wearing a CI, using their clinically assigned settings with envelope-based coding strategies. Percent correct was measured in three-interval three-alternative forced choice tasks, for the discrimination of fundamental frequency (F0) of broadband harmonic complexes, and for the discrimination of sinusoidal amplitude modulation rate (AMR) of broadband noise, with reference frequencies at 100 and 200 Hz to focus on voice pitch processing. Data were fitted using a maximum-likelihood technique. CI children displayed higher thresholds and shallower slopes than NH children in F0 discrimination, regardless of linguistic background. Thresholds and slopes were more similar between NH and CI children in AMR discrimination. Once the effect of chronological age was extracted from the variance, the aforementioned factors related to brain plasticity did not contribute significantly to the CI children's sensitivity to pitch. Unless different strategies attempt to encode fine structure information, potential benefits of plasticity may be missed.

  7. Analysis and Management of Complications in a Cohort of 1,065 Minimally Invasive Cochlear Implantations

    Science.gov (United States)

    Jiang, Yi; Gu, Ping; Li, Beicheng; Gao, Xue; Sun, Baochun; Song, Yueshuai; Wang, Guojian; Yuan, Yongyi; Wang, Cuicui; Liu, Miao; Han, Dongyi; Dai, Pu

    2017-01-01

    Objectives: To analyze complications associated with minimally invasive cochlear implantation by comparing data from different centers, to discuss major reasons for complications, and to refine implantation techniques to decrease them. Patients: Patients who underwent cochlear implantation at our center by the same surgeon (the corresponding author of this article) from March 2006 to March 2015 were enrolled. Intervention: First, a retrospective analysis of the complications associated with minimally invasive cochlear implantation at our center was performed. Second, published reports from other centers that describe complications were reviewed. Differences between complications in our cohort and other studies were evaluated. Main Outcome Measure: Strategies for reducing complications were assessed and modifications in surgical protocol proposed accordingly. Results: In total, 1,014 patients underwent 1,065 cochlear implantations. There were 28 complications (7 major, 21 minor) and only 2 reimplantations for the entire cohort, with no case of severe infection, flap necrosis, or device extrusion. The major complications were electrode misplacement, magnet displacement, implant failure secondary to trauma, and temporary cerebrospinal fluid leakage. The rates of major complications in our cohort were very low (0.6%) compared with those in the literature. Conclusion: Preoperative surgical planning based on individual patient anatomy and employment of soft surgical techniques can minimize surgical complications. PMID:28192378

  8. Cochlear implantation in patients with inner ear bone malformations with posterior labyrinth involvement: an exploratory study.

    Science.gov (United States)

    Palomeque Vera, Juan Miguel; Platero Sánchez-Escribano, María; Gómez Hervás, Javier; Fernández Prada, María; González Ramírez, Amanda Rocío; Sainz Quevedo, Manuel

    2016-04-01

    Inner ear bone malformations are one cause of profound sensorineural hearing loss. This investigation focused on those affecting the posterior labyrinth, especially enlarged vestibular aqueduct syndrome, which is associated with fluctuating and progressive hearing loss. The objectives of this study were to analyze the behavior of the electrical stimulation, auditory functionality and linguistic development in patients with inner ear malformations involving the posterior labyrinth. The study included ten patients undergoing cochlear implantation (cases: five with enlarged vestibular aqueduct, two with vestibular aqueduct stenosis/aplasia, and three with semicircular canal disorders). Post-implantation, data were gathered on the electrical stimulation threshold and maximum comfort levels and on the number of functioning electrodes. Evaluation of Auditory Responses to Speech (EARS) subtests were used to assess auditory functionality and language acquisition at 6, 12, and 24 months post-implantation. Results were compared with findings in a control group of 28 cochlear implantation patients without these malformations. No significant differences were found between case and control groups in electrical stimulation parameters; auditory functionality subtest scores were lower in cases than controls, although the difference was only statistically significant for some subtests. In conclusion, cochlear implantation patients with posterior labyrinth bone malformations and profound hearing loss, including those with enlarged vestibular aqueduct syndrome, showed no significant difference in electrical stimulation threshold with controls. Although some auditory functionality test results were lower in cases than in controls, cochlear implantation appears to be beneficial for all patients with these malformations.

  9. Safety and outcomes of cochlear implantation in the elderly:A review of recent literature

    Institute of Scientific and Technical Information of China (English)

    Zao Yang; Maura Cosetti

    2016-01-01

    Global demographic changes related to longevity are leading to increasing numbers of the elderly, for whom hearing loss is a significant cause of morbidity and disability. Once met with reticence, severely hearing impaired older adults are increasingly being considered for cochlear implantation (CI). Significant data indicate that CI in the elderly population is safe, well-tolerated, and effective. Risks from CI surgery and anesthesia are low and generally comparable to rates in other age groups. Outcomes studies regarding CI in older adults have shown excellent improvements to speech perception, quality of life, and even cognition. Overall, currently available data suggests that advanced age should not, in itself, be considered a barrier to implantation. This review paper will highlight selected articles from recent medical literature regarding the safety and efficacy of CI in the elderly population. Copyright © 2016, PLA General Hospital Department of Otolaryngology Head and Neck Surgery. Production and hosting by Elsevier (Singapore) Pte Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

  10. Cortical maturation in children with cochlear implants: Correlation between electrophysiological and behavioral measurement

    Science.gov (United States)

    Silva, Liliane Aparecida Fagundes; Couto, Maria Inês Vieira; Magliaro, Fernanda C. L.; Tsuji, Robinson Koji; Bento, Ricardo Ferreira; de Carvalho, Ana Claudia Martinho; Matas, Carla Gentile

    2017-01-01

    Central auditory pathway maturation in children depends on auditory sensory stimulation. The objective of the present study was to monitor the cortical maturation of children with cochlear implants using electrophysiological and auditory skills measurements. The study was longitudinal and consisted of 30 subjects, 15 (8 girls and 7 boys) of whom had a cochlear implant, with a mean age at activation time of 36.4 months (minimum, 17 months; maximum, 66 months), and 15 of whom were normal-hearing children who were matched based on gender and chronological age. The auditory and speech skills of the children with cochlear implants were evaluated using GASP, IT-MAIS and MUSS measures. Both groups underwent electrophysiological evaluation using long-latency auditory evoked potentials. Each child was evaluated at three and nine months after cochlear implant activation, with the same time interval adopted for the hearing children. The results showed improvements in auditory and speech skills as measured by IT-MAIS and MUSS. Similarly, the long-latency auditory evoked potential evaluation revealed a decrease in P1 component latency; however, the latency remained significantly longer than that of the hearing children, even after nine months of cochlear implant use. It was observed that a shorter P1 latency corresponded to more evident development of auditory skills. Regarding auditory behavior, it was observed that children who could master the auditory skill of discrimination showed better results in other evaluations, both behavioral and electrophysiological, than those who had mastered only the speech-detection skill. Therefore, cochlear implant auditory stimulation facilitated auditory pathway maturation, which decreased the latency of the P1 component and advanced the development of auditory and speech skills. The analysis of the long-latency auditory evoked potentials revealed that the P1 component was an important biomarker of auditory development during the

  11. Cochlear Implants in Children Diagnosed with CHARGE Syndrome

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    Cardoso, Carolina Costa

    2013-09-01

    Full Text Available Introduction: The CHARGE association (coloboma of the eyes; heart disease; atresia of the choanae; retarded growth and development; genital hypoplasia/genitourinary anomalies; ear anomalies and/or hearing loss was first described in 1979 by Hall, and among its main features is hearing loss. This study presents a case aiming to establish relationships between performance on Infant Toddler Meaningful Auditory Integration Scale (IT-MAIS and Meaningful Use of Speech Scales (MUSS tests and the analysis of hearing and language categories of a patient diagnosed with CHARGE syndrome, before and after cochlear implant (CI surgery. Case Report: A 7-year-old girl was diagnosed with CHARGE. She had severe sensorineural hearing loss and was a prelingual unilateral CI user. We analyzed data from the patient's medical records regarding therapies and video recordings. Results: The patient showed positive results in all evaluations after CI. IT-MAIS rose from 5 to 90% following the use of CI. MUSS also rose, from 75 to 72.5%, after use of CI. Classification of Auditory Skills changed from category 1 before use of CI to category 6 after use of CI. Classification of Language Skills changed from category 1 before use of CI to category 3 after use of CI. The CI is an aid but there are many factors in the therapeutic process, and great heterogeneity in individuals diagnosed with CHARGE should be investigated. Conclusion: The development of listening and language skills after CI use was demonstrated by IT-MAIS and MUSS tests, and categorization of speech and hearing in this child with a diagnosis of CHARGE syndrome shows that CI can be an effective technological resource to provide information on hearing as one source for language construction.

  12. Binaural integration abilities in bilateral cochlear implant user

    Institute of Scientific and Technical Information of China (English)

    Chie Obuchi; Masae Shiroma; Sayaka Ogane; Kimitaka Kaga

    2015-01-01

    Bilateral Cochlear implants (CIs) improved speech intelligibility, speech perception in background noise, and sound localization in quiet and noisy situations. However, it is unclear whether these advantages essentially result in binaural integration of acoustic stimuli from each ear. In this study, we investigated the effectiveness of binaural integration by bilateral CIs placement using binaural hearing tests and subjective auditory perceptual assessment. A 61-year-old bilateral CIs subject underwent the following four tests:the Japanese Hearing in Noise Test (HINT-J), the dichotic listening test (DLT), the Rapidly Alternating Speech Perception (RASP) test, and subjective auditory perceptual assessment. The HINT-J score was significantly higher for bilateral CIs than for a unilateral CI. However, DLT and the RASP test revealed contradictory results. Subjective auditory perceptual assessment revealed active and bright impressions for bilateral hearing, which were also noisy and strong compared with those for unilateral hearing. The results of this study revealed that bilateral CIs improved speech perception in background noise and an improved auditory impression, although the bilateral integration abilities were not improved. This was probably because the patient was required to combine information from the two ears into a single perception in DLT and the RASP test. More longitudinal data should be collected and analyzed in future studies to evaluate the long-term effects of bilateral CIs. Copyright © 2016, PLA General Hospital Department of Otolaryngology Head and Neck Surgery. Production and hosting by Elsevier (Singapore) Pte Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

  13. Clinical evaluation of the xDP output compression strategy for cochlear implants.

    Science.gov (United States)

    Bozorg-Grayeli, Alexis; Guevara, Nicolas; Bebear, Jean-Pierre; Ardoint, Marine; Saaï, Sonia; Hoen, Michel; Gnansia, Dan; Romanet, Philippe; Lavieille, Jean-Pierre

    2016-09-01

    Technological advances in the domain of digital signal processing adapted to cochlear implants (CI) are partially responsible for the ever-improving outcomes observed with this neural prosthesis. The goal of the present study was to evaluate audiometric outcomes with a new signal processing strategy implemented in Oticon Medical-Neurelec cochlear implant systems, the xDP strategy. The core of this approach is a preset-based back-end output compression system, modulating a multi-channel transfer function depending on the intensity and information content of input sounds. Twenty adult CI patients, matched for age and CI experience, were included in this study. Pure-tone thresholds and vocal audiometry scores were measured with their former signal processing strategy and with xDP. Speech perception was assessed using dissyllabic words presented in quiet, at different intensity levels: 40, 55, 70, and 85 dB SPL, and in a cocktail party noise at a signal-to-noise ratio of +10 dB. Results with the xDP strategy showed, as awaited, no major modification of pure-tone thresholds. A global increase of speech perception scores was observed after a 1-month habituation period, with significant improvements for speech perception in quiet for moderate (55 dB SPL), loud speech sounds (85 dB SPL), and speech-in-noise comprehension. Subjective signal quality assessment showed a preference for Crystalis(xDP) over the former strategy. These results allow the quantification of improvements provided by the xDP signal processing strategy.

  14. Effective use of the spectral information in speech processing of cochlear implant

    Institute of Scientific and Technical Information of China (English)

    GUAN Tian; GONG Qin; YE Datian

    2007-01-01

    Based on the results of the acoustic research on Mandarin, two novel algorithms using the spectral information in speech processing of cochlear implants are purposed and certified effectively by the spectral information of tonal language in acoustic simulation experiments. We bring forward novel algorithms conveying the spectral information based on the choices of the frequency bands. These new algorithms can not only improve the speech recognition ability of cochlear implant users in the noisy environments but also reduce the complexity of computing and the memory occupied, and make it more suitable to be carried out in clinical practice.

  15. Effects of steroids and lubricants on electrical impedance and tissue response following cochlear implantation.

    Science.gov (United States)

    Huang, Christie Qi; Tykocinski, Michael; Stathopoulos, Dimitra; Cowan, Robert

    2007-09-01

    The present study examined the effects of steroids and lubricants on electrical impedance and tissue response following cochlear implantation in animal models. Guinea pigs were implanted following either no treatment, or intrascalar injection with dexamethasone, triamcinolone, sodium hyaluronate or saline. Cats were implanted following either no treatment, or intrascalar injection with dexamethasone, triamcinolone or a mixture of triamcinolone with sodium hyaluronate. In guinea pigs, impedance changes and intracochlear tissue response were less for the hyaluronate and saline groups. In cats, impedance in the dexamethasone group increased similar to non-treated cats. Impedance of triamcinolone treated cats remained low for about two months after implantation, before increasing to levels similar to the other groups. Significant fibrous tissue growth was observed histologically. The results of the present study indicate that a single intracochlear application of hyaluronate or triamcinolone may postpone, but will ultimately not prevent the rise in impedance following cochlear implantation.

  16. Reestablishing speech understanding through musical ear training after cochlear implantation: a study of the potential cortical plasticity in the brain

    DEFF Research Database (Denmark)

    Petersen, Bjørn; Mortensen, Malene V; Gjedde, Albert

    2009-01-01

    Cochlear implants (CIs) provide impressive speech perception for persons with severe hearing loss, but many CI recipients fail in perceiving speech prosody and music. Successful rehabilitation depends on cortical plasticity in the brain and postoperative measures. The present study evaluates...... the behavioral and neurologic effects of musical ear training on CI users' speech and music perception. The goal is to find and work out musical methods to improve CI users' auditory capabilities and, in a longer perspective, provide an efficient strategy for improving speech understanding for both adults...

  17. Hearing rehabilitation in cerebral palsy: development of language and hearing after cochlear implantation

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    Anacléia Melo da Silva Hilgenberg

    2015-06-01

    Full Text Available INTRODUCTION: Auditory rehabilitation in children with bilateral severe-to-profound sensorineural hearing loss with cochlear implant has been developed in recent decades; however, the rehabilitation of children with cerebral palsy still remains a challenge to otolaryngology and speech therapy professionals. OBJECTIVE: To verify the effectiveness of cochlear implants in the development of auditory and language skills in children with cerebral palsy. METHODS: A prospective analytical study. The evaluation of auditory responses to speech test was applied to the children in this study at regular intervals following implantation. Standardized tests that assess and quantify the development of auditory and language skills were administered and speech therapy video records and speech therapy files were analyzed. All children went through individually tailored intensive audiological rehabilitation programs following cochlear implantation. RESULTS: Two participants had gradual auditory and language development when compared to other participants who reached advanced levels in hearing and oral language classifications. CONCLUSION: The use of the Cochlear implant enabled participants to reach advanced stages of hearing and language skills in three of the five participants with cerebral palsy in this study. This electronic device is a viable therapeutic option for children with cerebral palsy to help them achieve complex levels of auditory and language skills.

  18. A Two-Microphone Noise Reduction System for Cochlear Implant Users with Nearby Microphones—Part II: Performance Evaluation

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    Rudolf Häusler

    2008-06-01

    Full Text Available Users of cochlear implants (auditory aids, which stimulate the auditory nerve electrically at the inner ear often suffer from poor speech understanding in noise. We evaluate a small (intermicrophone distance 7 mm and computationally inexpensive adaptive noise reduction system suitable for behind-the-ear cochlear implant speech processors. The system is evaluated in simulated and real, anechoic and reverberant environments. Results from simulations show improvements of 3.4 to 9.3 dB in signal to noise ratio for rooms with realistic reverberation and more than 18 dB under anechoic conditions. Speech understanding in noise is measured in 6 adult cochlear implant users in a reverberant room, showing average improvements of 7.9–9.6 dB, when compared to a single omnidirectional microphone or 1.3–5.6 dB, when compared to a simple directional two-microphone device. Subjective evaluation in a cafeteria at lunchtime shows a preference of the cochlear implant users for the evaluated device in terms of speech understanding and sound quality.

  19. Semiautomatic Cochleostomy Target and Insertion Trajectory Planning for Minimally Invasive Cochlear Implantation

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    Wilhelm Wimmer

    2014-01-01

    Full Text Available A major component of minimally invasive cochlear implantation is atraumatic scala tympani (ST placement of the electrode array. This work reports on a semiautomatic planning paradigm that uses anatomical landmarks and cochlear surface models for cochleostomy target and insertion trajectory computation. The method was validated in a human whole head cadaver model (n=10 ears. Cochleostomy targets were generated from an automated script and used for consecutive planning of a direct cochlear access (DCA drill trajectory from the mastoid surface to the inner ear. An image-guided robotic system was used to perform both, DCA and cochleostomy drilling. Nine of 10 implanted specimens showed complete ST placement. One case of scala vestibuli insertion occurred due to a registration/drilling error of 0.79 mm. The presented approach indicates that a safe cochleostomy target and insertion trajectory can be planned using conventional clinical imaging modalities, which lack sufficient resolution to identify the basilar membrane.

  20. Assessment of SAR in the tissues near a cochlear implant exposed to radiofrequency electromagnetic fields

    Energy Technology Data Exchange (ETDEWEB)

    Sibella, F; Parazzini, M; Paglialonga, A; Ravazzani, P [Istituto di Ingegneria Biomedica, Consiglio Nazionale delle Ricerche, Piazza Leonardo da Vinci, 32, 20133 Milano (Italy)], E-mail: federica.sibella@polimi.it, E-mail: marta.parazzini@polimi.it, E-mail: alessia.paglialonga@polimi.it, E-mail: paolo.ravazzani@polimi.it

    2009-04-21

    Cochlear implants (CI) are electronic devices used to restore partial hearing to people with severe hearing impairment. This paper aims to investigate if the introduction of a CI has an effect on SAR distribution in a head model exposed to radiofrequency electromagnetic fields (RF EMF) at mobile communication frequencies. The head model was obtained by image segmentation, the implant was modelled as a geometric structure and the exposure source was modelled as a uniform plane wave at 900 MHz, 1750 MHz and 1950 MHz, incident on the side of the head with the CI. Vertical and horizontal polarizations were simulated. Results show that the presence of a CI inside the cochlea produces negligible variations in the averaged SAR values, both in the head and in the cochlear tissues, although very localized differences in point SAR were found in the cochlea. Globally, these results suggest that finding harmful effects in the cochlear tissues will be unlikely. (note)

  1. Cochlear Implant Outcomes and Genetic Mutations in Children with Ear and Brain Anomalies

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    Micol Busi

    2015-01-01

    Full Text Available Background. Specific clinical conditions could compromise cochlear implantation outcomes and drastically reduce the chance of an acceptable development of perceptual and linguistic capabilities. These conditions should certainly include the presence of inner ear malformations or brain abnormalities. The aims of this work were to study the diagnostic value of high resolution computed tomography (HRCT and magnetic resonance imaging (MRI in children with sensorineural hearing loss who were candidates for cochlear implants and to analyse the anatomic abnormalities of the ear and brain in patients who underwent cochlear implantation. We also analysed the effects of ear malformations and brain anomalies on the CI outcomes, speculating on their potential role in the management of language developmental disorders. Methods. The present study is a retrospective observational review of cochlear implant outcomes among hearing-impaired children who presented ear and/or brain anomalies at neuroimaging investigations with MRI and HRCT. Furthermore, genetic results from molecular genetic investigations (GJB2/GJB6 and, additionally, in selected cases, SLC26A4 or mitochondrial-DNA mutations on this study group were herein described. Longitudinal and cross-sectional analysis was conducted using statistical tests. Results. Between January 1, 1996 and April 1, 2012, at the ENT-Audiology Department of the University Hospital of Ferrara, 620 cochlear implantations were performed. There were 426 implanted children at the time of the present study (who were <18 years. Among these, 143 patients (64 females and 79 males presented ear and/or brain anomalies/lesions/malformations at neuroimaging investigations with MRI and HRCT. The age of the main study group (143 implanted children ranged from 9 months and 16 years (average = 4.4; median = 3.0. Conclusions. Good outcomes with cochlear implants are possible in patients who present with inner ear or brain abnormalities

  2. Development of communication and speech skills after cochlear implant in a sign language child.

    Science.gov (United States)

    Cassandro, E; Nicastri, M; Chiarella, G; Genovese, E; Gallo, L V; Catalano, M

    2003-04-01

    In selecting patients to undergo cochlear implant, a pre-existing use of sign language gives rise to two problems that have been widely debated in the literature. First, the caution shown toward the candidacy of patients using this mode of communication, since it is considered a possible element of interference in the acquisition of speech. Secondly, refusal of the cochlear implant procedure, on the part of the deaf community, on the grounds both of cultural identity and of it being more "natural" for a deaf person to use an unimpaired visual channel rather than an impaired hearing channel. In order to establish whether knowledge of sign language does, indeed, affect speech production negatively and evaluate which mode of communication, oral or gestual, is preferred, the present investigation was carried out on a preverbal deaf child who had undergone cochlear implant at about 7 years of age and has always used both languages. His verbal skills were evaluated in the precochlear implant stage, then at 6 and 12 months after, together with the changes in his use of sign language and in the relationship between the two modes. Results, besides observing the presence of linguistic evolution at each level examined and already evident at 6 months, also documented a progressive reduction in the spontaneous use of sign language. In conclusion, the present experience revealed no temporal or qualitative differences in post-cochlear implant evolution of speech skills, in comparison with that observed in patients with an exclusively aural-oral approach. Furthermore, the increased use of the hearing pathway, made possible by cochlear implant, determined a spontaneous choice of verbal language as the most natural and economic mode of communication.

  3. The parents as assessors of the quality of life of their cochlear implanted children

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    Silvia Andrea BORKOSKI-BARREIRO

    2016-12-01

    Full Text Available Introduction and objective: Quality of life refers to the hability of an individual to enjoy normal life activities, including aspects of functional capacity and well-being. The concept of quality of life has been increasingly used in the field of health assessments. Only recently have the effects of Cochlear implantation from the perspective of emotional and social development begun to be investigate. To examine the results of health-related quality of life in cochlear implanted children between 11 and 12 years of age and their parents. Method: Observational, transversal descriptive study .24 unilateral or successive bilateral children implanted prelingually between 11 and 12 years of age and their parents. The pediatric quality of life questionnaire Persil ™ (Version 4.0, Spanish for Spain was used to measure health-related quality of life. It was completed independently by children and parents. Results: The results were analyzed by means of a T -Student test. The outcomes of children and parents at different scales evaluated show that statistically significant results appear on scales of emotional and academic functioning (p < 0.05. When comparing the overall result of the questionnaire with the different scales evaluated, all show statistically significant results (p < 0.05. Discussion: It has been proven the success of a cochlear implant in speech and language field, this leads us calls into question beyond these areas; yield at home, at school and in different social contexts. There are few studies that explain through parental questionnaires expectations and their perception of the quality of life in cochlear implanted in children. Conclusions: The results of the study show that children enjoy the benefits of using a cochlear implant. They report benefits in all areas studied (physical, emotional, social and academic. Parents are reliable reporters about the state of the overall quality of life of their children since their answers were

  4. Survey of cochlear implant user satisfaction with the Neptune™ waterproof sound processor

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    Jeroen J. Briaire

    2016-04-01

    Full Text Available A multi-center self-assessment survey was conducted to evaluate patient satisfaction with the Advanced Bionics Neptune™ waterproof sound processor used with the AquaMic™ totally submersible microphone. Subjective satisfaction with the different Neptune™ wearing options, comfort, ease of use, sound quality and use of the processor in a range of active and water related situations were assessed for 23 adults and 73 children, using an online and paper based questionnaire. Upgraded subjects compared their previous processor to the Neptune™. The Neptune™ was most popular for use in general sports and in the pool. Subjects were satisfied with the sound quality of the sound processor outside and under water and following submersion. Seventyeight percent of subjects rated waterproofness as being very useful and 83% of the newly implanted subjects selected waterproofness as one of the reasons why they chose the Neptune™ processor. Providing a waterproof sound processor is considered by cochlear implant recipients to be useful and important and is a factor in their processor choice. Subjects reported that they were satisfied with the Neptune™ sound quality, ease of use and different wearing options.

  5. Spiral Ganglion Cells and Macrophages Initiate Neuro-inflammation and Scarring Following Cochlear Implantation

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    Esperanza eBas

    2015-08-01

    Full Text Available Conservation of a patient’s residual hearing and prevention of fibrous tissue/new bone formation around an electrode array are some of the major challenges in cochlear implant (CI surgery. Although it is well known that fibrotic tissue formation around the electrode array can interfere with hearing performance in implanted patients, and that associated intracochlear inflammation can initiate loss of residual hearing, little is known about the molecular and cellular mechanisms that promote this response in the cochlea. In vitro studies in neonatal rats and in vivo studies in adult mice were performed to gain insight into the pro-inflammatory, proliferative, and remodeling phases of pathological wound healing that occur in the cochlea following an electrode analogue insertion. Resident Schwann cells, macrophages/microglia, and fibroblasts had a prominent role in the inflammatory process in the cochlea. Leukocytes were recruited to the cochlea following insertion of a nylon filament in adult mice, where contributed to the inflammatory response. The reparative stages in wound healing are characterized by persistent neuro-inflammation of spiral ganglion neurons and expression of regenerative macrophages in the cochlea. Accordingly, genes involved in extracellular matrix deposition and remodeling were up-regulated in implanted cochleae.Maturation of scar tissue occurs in the remodeling phase of wound healing in the cochlea. Similar to other damaged peripheral nerves, M2 macrophages and de-differentiated Schwann cells were observed in damaged cochleae and may play a role in cell survival and axonal regeneration. In conclusion, the insertion of an electrode analogue into the cochlea is associated with robust early and chronic inflammatory responses characterized by recruitment of leukocytes and expression of pro-inflammatory cytokines that promote intracochlear fibrosis and loss of auditory hair cells and spiral ganglion neurons important for hearing

  6. Cochlear Implant: the complexity involved in the decision making process by the family

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    Sheila de Souza Vieira

    2014-06-01

    Full Text Available OBJECTIVE: to understand the meanings the family attributes to the phases of the decision-making process on a cochlear implant for their child.METHOD: qualitative research, using Symbolic Interactionism and Grounded Theory as the theoretical and methodological frameworks, respectively. Data collection instrument: semistructured interview. Nine families participated in the study (32 participants.RESULTS: knowledge deficit, difficulties to contextualize benefits and risks and fear are some factors that make this process difficult. Experiences deriving from interactions with health professionals, other cochlear implant users and their relatives strengthen decision making in favor of the implant.CONCLUSION: deciding on whether or not to have the implant involves a complex process, in which the family needs to weigh gains and losses, experience feelings of accountability and guilt, besides overcoming the risk aversion. Hence, this demands cautious preparation and knowledge from the professionals involved in this intervention.

  7. Assessment of morphological-functional state of children with cochlear implants

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    Pysanko V.M.

    2016-10-01

    Full Text Available Purpose: assessment of morphological-functional state of pre-school age children with cochlear implants and substantiation of need in post-operative rehabilitation in period of preparation for comprehensive school. Material: we tested weakly hearing children with cochlear implants (n=127, age - 5.6±0.6 years. They were the main group. Control group consisted of children with normal hearing (n=70, age - 5.7±0.4 years. Morphological-functional state was assessed by indicators of physical and biological condition, visual analyzer, posture parameters and foot arch, muscular system and level of coordination. We calculated index of integral morphological-functional state assessment. Results: Morphological functional state of most of children (with cochlear implants was characterized by low physical condition indicators and disharmony. We observed delay in biological development. Index of morphological-functional state integral assessment witnesses, that such child can not study in comprehensive school. Rehabilitation program can reduce the gap between children with normal hearing and those with cochlear implants. Conclusions: Rehabilitation program facilitates quicker domestic and social rehabilitation of children at the account of widening the circle of communication, learning new actions and conceptions. It can permit for such children to study at school together with their healthy peers.

  8. Intracochlear drug delivery in combination with cochlear implants : Current aspects.

    Science.gov (United States)

    Plontke, S K; Götze, G; Rahne, T; Liebau, A

    2017-01-01

    Local drug application to the inner ear offers a number of advantages over systemic delivery. Local drug therapy currently encompasses extracochlear administration (i. e., through intratympanic injection), intracochlear administration (particularly for gene and stem cell therapy), as well as various combinations with auditory neurosensory prostheses, either evaluated in preclinical or clinical studies, or off-label. To improve rehabilitation with cochlear implants (CI), one focus is the development of drug-releasing electrode carriers, e. g., for delivery of glucocorticosteroids, antiapoptotic substances, or neurotrophins to the inner ear. The performance of cochlear implants may thus be improved by protecting neuronal structures from insertion trauma, reducing fibrosis in the inner ear, and by stimulating growth of neuronal structures in the direction of the electrodes. Controlled drug release after extracochlear or intracochlear application in conjunction with a CI can also be achieved by use of a biocompatible, resorbable controlled-release drug-delivery system. Two case reports for intracochlear controlled release drug delivery in combination with cochlear implants are presented. In order to treat progressive reduction in speech discrimination and increased impedance, two cochlear implant patients successfully underwent intracochlear placement of a biocompatible, resorbable drug-delivery system for controlled release of dexamethasone. The drug levels reached in inner ear fluids after different types of local drug application strategies can be calculated using a computer model. The intracochlear drug concentrations calculated in this way were compared for different dexamethasone application strategies.

  9. Parenting a Child with a Cochlear Implant: A Critical Incident Study

    Science.gov (United States)

    Zaidman-Zait, Anat

    2007-01-01

    This study aimed to describe and categorize the attributes that parents of young children with cochlear implants (CIs) consider as facilitating their parental coping experience. I interviewed 15 hearing mothers and 13 hearing fathers (including 12 married couples) whose children had CIs, using the critical incident technique that asked parents to…

  10. Benefits of Music Training in Mandarin-Speaking Pediatric Cochlear Implant Users

    Science.gov (United States)

    Fu, Qian-Jie; Galvin, John J., III; Wang, Xiaosong; Wu, Jiunn-Liang

    2015-01-01

    Purpose: The aims of this study were to assess young (5- to 10-year-old) Mandarin-speaking cochlear implant (CI) users' musical pitch perception and to assess the benefits of computer-based home training on performance. Method: Melodic contour identification (MCI) was used to assess musical pitch perception in 14 Mandarin-speaking pediatric CI…

  11. Executive Functioning Skills in Preschool-Age Children with Cochlear Implants

    Science.gov (United States)

    Beer, Jessica; Kronenberger, William G.; Castellanos, Irina; Colson, Bethany G.; Henning, Shirley C.; Pisoni, David B.

    2014-01-01

    Purpose: The purpose of this study was to determine whether deficits in executive functioning (EF) in children with cochlear implants (CIs) emerge as early as the preschool years. Method: Two groups of children ages 3 to 6 years participated in this cross-sectional study: 24 preschoolers who had CIs prior to 36 months of age and 21 preschoolers…

  12. Parental Involvement in the Habilitation Process Following Children's Cochlear Implantation: An Action Theory Perspective

    Science.gov (United States)

    Zaidman-Zait, Anat; Young, Richard A.

    2008-01-01

    Action theory and the qualitative action-project method are used in this study to address and illustrate the complexity of parenting children who have received cochlear implants (CIs) as well as the intentionality of parents engaged in that process. "Action" refers to individual and joint goal-directed and intentional behaviors. Action theory has…

  13. Cochlear implant electrode array insertion monitoring with intra-operative 3D rotational X-ray

    NARCIS (Netherlands)

    Carelsen, B; Grolman, W; Tange, R; Streekstra, G J; van Kemenade, P; Jansen, R J; Freling, N J M; White, M; Maat, B; Fokkens, W J

    2007-01-01

    During cochlear implantation surgery, we use a mobile C-arm with 3D functionality to acquire per-operative 3D X-ray images. Scanning the multielectrode array is performed once before removal of the stylet and once after full insertion. When dissatisfied with the position of the multielectrode a repo

  14. CT findings of the temporal bone in CHARGE syndrome : aspects of importance in cochlear implant surgery

    NARCIS (Netherlands)

    Vesseur, A. C.; Verbist, B. M.; Westerlaan, H. E.; Kloostra, F. J. J.; Admiraal, R. J. C.; van Ravenswaaij-Arts, C. M. A.; Free, R. H.; Mylanus, E. A. M.

    2016-01-01

    To provide an overview of anomalies of the temporal bone in CHARGE syndrome relevant to cochlear implantation (CI), anatomical structures of the temporal bone and the respective genotypes were analysed. In this retrospective study, 42 CTs of the temporal bone of 42 patients with CHARGE syndrome were

  15. A Cochlear Implant Signal Processing Lab: Exploration of a Problem-Based Learning Exercise

    Science.gov (United States)

    Bhatti, P. T.; McClellan, J. H.

    2011-01-01

    This paper presents an introductory signal processing laboratory and examines this laboratory exercise in the context of problem-based learning (PBL). Centered in a real-world application, a cochlear implant, the exercise challenged students to demonstrate a working software-based signal processor. Partnering in groups of two or three, second-year…

  16. Beyond hearing : social-emotional outcomes following cochlear implantation in young children

    NARCIS (Netherlands)

    Ketelaar, Lizet

    2014-01-01

    In comparison to hearing children, children with hearing loss more often experience social-emotional problems. This thesis aimed to assess whether this was also true for 1-to-5-year-old children who had received a cochlear implant (CI) to remediate their hearing loss. In comparison to hearing peers,

  17. Facilitating Vocabulary Acquisition of Children with Cochlear Implants Using Electronic Storybooks

    Science.gov (United States)

    Messier, Jane; Wood, Carla

    2015-01-01

    The present intervention study explored the word learning of 18 children with cochlear implants in response to E-book instruction. Capitalizing on the multimedia options available in electronic storybooks, the intervention incorporated videos and definitions to provide a vocabulary intervention that includes evidence-based teaching strategies. The…

  18. Music Perception of Cochlear Implant Recipients with Implications for Music Instruction: A Review of the Literature

    Science.gov (United States)

    Hsiao, Feilin; Gfeller, Kate

    2012-01-01

    This review of the literature presents a systematic analysis of the capabilities and limitations of cochlear implant (CI) recipients with regard to music perception. Specifically, it (a) analyzes individual components of music (e.g., rhythm, timbre, and pitch) as they interface with the technical characteristics of CIs and the perceptual abilities…

  19. Expressive vocabulary, morphology, syntax and narrative skills in profoundly deaf children after early cochlear implantation

    NARCIS (Netherlands)

    Boons, Tinne; De Raeve, Leo; Langereis, Margreet; Peeraer, Louis; Wouters, Jan; Wieringen, van

    2013-01-01

    Practical experience and research reveal generic spoken language benefits after cochlear implantation. However, systematic research on specific language domains and error analyses are required to probe sub-skills. Moreover, the effect of predictive factors on distinct language domains is unknown. In

  20. Phonological Abilities of Hearing-Impaired Cantonese-Speaking Children with Cochlear Implants or Hearing Aids

    Science.gov (United States)

    Law, Zoe W. Y.; So, Lydia K. H.

    2006-01-01

    Purpose: This article examined the phonological skills of 2 groups of Cantonese-speaking children with prelingual, profound bilateral hearing loss. The phonological abilities of 7 children fitted with hearing aids were compared with the abilities of 7 children who wore cochlear implants. Method: Participants in each group ranged in age from 5;1…

  1. AUDITORY REHABILITATION AND BILATERAL COCHLEAR IMPLANT ON CHILD WHITH CEREBRAL PALSY

    Directory of Open Access Journals (Sweden)

    Anacléia Melo da Silva Hilgenberg

    2013-01-01

    Full Text Available OBJECTIVE: To describe the hearing and language improvement in children with cerebral palsy submitted to cochlear implantation bilaterally. METHODS: Prospective, analytical descriptive. Study case and a broad bibliographical analysis in MEDLINE/PUBMED and EMBASE including detailed analysis of the rehabilitation techniques as serial phonoaudiological appointments; Sessions of phonoterapy recorded and criterious analysis of the tests such as IT-MAIS and MacArthur analysis. The teste were applied after Bilateral Cochlear Implantation: 15, 20, 22, 31 e 38 months.RESULTS: The results obtained and bibliographical analysis showed that cochlear implantation in children with cerebral palsy and profound hearing loss is the best option at the moment to perform hearing rehabilitation. The IT-MAIS and MacArthur tests showed a big improvement at 15 and 38 months after use of the cochlear implants. The IT-MAIS test showed 40% score in the beggining and 75% at the end. Mac Arthur test revealed a big evolution at vocabulary comprehension (58 to 342 and linguistic repertory (54 to 289.

  2. Song Recognition by Young Children with Cochlear Implants: Comparison between Unilateral, Bilateral, and Bimodal Users

    Science.gov (United States)

    Bartov, Tamar; Most, Tova

    2014-01-01

    Purpose: To examine song identification by preschoolers with normal hearing (NH) versus preschoolers with cochlear implants (CIs). Method: Participants included 45 children ages 3;8-7;3 (years;months): 12 with NH and 33 with CIs, including 10 with unilateral CI, 14 with bilateral CIs, and 9 bimodal users (CI-HA) with unilateral CI and…

  3. Long-Term Predictors of Narrative Skill in Children with Early Bilateral Cochlear Implants

    Science.gov (United States)

    Klein, Kelsey E.; Wie, Ona Bø

    2015-01-01

    Narratives require the integration of many different linguistic skills and can be used as an ecologically valid measure of child language development. This study investigated the narrative skills of 18 six- to seven-year-old prelingually deaf children who received simultaneous bilateral cochlear implants (CI) between 5 and 18 months of age. No…

  4. Cochlear implants and the claims of culture? A response to Lane and Grodin.

    Science.gov (United States)

    Davis, Dena S

    1997-09-01

    Because I reject the notion that physical characteristics constitute cultural membership, I argue that, even if the claim were persuasive that deafness is a culture rather than a disability, there is no reason to fault hearing parents who choose cochlear implants for their deaf children.

  5. Electrochemical study of potential materials for cochlear implant electrode array (abstract)

    NARCIS (Netherlands)

    Lawand, N.S.; Lopez, V.; French, P.J.

    2013-01-01

    Cochlear implants (CIs) are commonly accepted therapeutic devices for clinical use and have restored hearing to more than 230,000 profoundly deaf people. CI devices consists of an external part comprising a speech processor (DSP) a microphone which together receive and convert the sound into a digit

  6. Identification and evaluation of cochlear implant candidates with asymmetrical hearing loss

    NARCIS (Netherlands)

    Vincent, C.; Arndt, S.; Firszt, J.B.; Fraysse, B.; Kitterick, P.T.; Papsin, B.C.; Snik, A.F.M.; Heyning, P. Van de; Deguine, O.; Marx, M.

    2015-01-01

    OBJECTIVE: Recommendation for cochlear implant (CI) treatment for individuals with severe to profound single-sided deafness (SSD) and asymmetrical hearing loss (AHL) is on the rise. This raises the need for greater consistency in the definition of CI candidacy for these cases and in the assessment m

  7. Deaf Parents of Cochlear-Implanted Children: Beliefs on Bimodal Bilingualism

    Science.gov (United States)

    Mitchiner, Julie Cantrell

    2015-01-01

    This study investigated 17 Deaf families in North America with cochlear-implanted children about their attitudes, beliefs, and practices on bimodal bilingualism (defined as using both a visual/manual language and an aural/oral language) in American Sign Language (ASL) and English. A survey and follow-up interviews with 8 families were conducted.…

  8. Transcribing the Speech of Children with Cochlear Implants: Clinical Application of Narrow Phonetic Transcriptions

    Science.gov (United States)

    Teoh, Amy P.; Chin, Steven B.

    2009-01-01

    Purpose: The phonological systems of children with cochlear implants may include segment inventories that contain both target and nontarget speech sounds. These children may not consistently follow phonological rules of the target language. These issues present a challenge for the clinical speech-language pathologist who uses phonetic…

  9. Perception of Suprasegmental Features of Speech by Children with Cochlear Implants and Children with Hearing Aids

    Science.gov (United States)

    Most, Tova; Peled, Miriam

    2007-01-01

    This study assessed perception of suprasegmental features of speech by 30 prelingual children with sensorineural hearing loss. Ten children had cochlear implants (CIs), and 20 children wore hearing aids (HA): 10 with severe hearing loss and 10 with profound hearing loss. Perception of intonation, syllable stress, word emphasis, and word pattern…

  10. The Influence of Word Characteristics on the Vocabulary of Children with Cochlear Implants

    Science.gov (United States)

    Han, Min Kyung; Storkel, Holly L.; Lee, Jaehoon; Yoshinaga-Itano, Christine

    2015-01-01

    The goal of this study was to explore the effects of phonotactic probability, word length, word frequency, and neighborhood density on the words known by children with cochlear implants (CIs) varying in vocabulary outcomes in a retrospective analysis of a subset of data from a longitudinal study of hearing loss. Generalized linear mixed modeling…

  11. Parental mode of communication is essential for speech and language outcomes in cochlear implanted children

    DEFF Research Database (Denmark)

    Percy-Smith, Lone; Cayé-Thomasen, Per; Breinegaard, Nina;

    2010-01-01

    The present study demonstrates a very strong effect of the parental communication mode on the auditory capabilities and speech/language outcome for cochlear implanted children. The children exposed to spoken language had higher odds of scoring high in all tests applied and the findings suggest...

  12. Cochlear implants in children : development in interaction with the social context

    NARCIS (Netherlands)

    Wiefferink, K.C.

    2012-01-01

    Between 150 and 200 deaf children are born in the Netherlands each year. Deafness has major consequences for these children’s development, as it deprives them of access to spoken language. Since the 1990s, deaf children have been able to have a cochlear implant (CI), which enables them to experience

  13. Long-Term Trajectories of the Development of Speech Sound Production in Pediatric Cochlear Implant Recipients

    Science.gov (United States)

    Tomblin, J. Bruce; Peng, Shu-Chen; Spencer, Linda J.; Lu, Nelson

    2008-01-01

    Purpose: This study characterized the development of speech sound production in prelingually deaf children with a minimum of 8 years of cochlear implant (CI) experience. Method: Twenty-seven pediatric CI recipients' spontaneous speech samples from annual evaluation sessions were phonemically transcribed. Accuracy for these speech samples was…

  14. The Emergence of Productive Speech and Language in Spanish-Learning Paediatric Cochlear Implant Users

    Science.gov (United States)

    Moreno-Torres, Ignacio

    2014-01-01

    It has been proposed that cochlear implant users may develop robust categorical perception skills, but that they show limited precision in perception. This article explores if a parallel contrast is observable in production, and if, despite acquiring typical linguistic representations, their early words are inconsistent. The participants were…

  15. Executive Functioning and Speech-Language Skills Following Long-Term Use of Cochlear Implants

    Science.gov (United States)

    Kronenberger, William G.; Colson, Bethany G.; Henning, Shirley C.; Pisoni, David B.

    2014-01-01

    Neurocognitive processes such as executive functioning (EF) may influence the development of speech-language skills in deaf children after cochlear implantation in ways that differ from normal-hearing, typically developing children. Conversely, spoken language abilities and experiences may also exert reciprocal effects on the development of EF.…

  16. A Longitudinal Study of Pragmatic Language Development in Three Children with Cochlear Implants

    Science.gov (United States)

    Dammeyer, Jesper

    2012-01-01

    Research has shown how cochlear implants (CIs), in children with hearing impairments, have improved speech perception and production, but very little is known about the children's pragmatic language development. During a 4-year longitudinal study of three children with CIs, certain aspects of pragmatic language development were observed in free…

  17. Maternal Involvement in the Home Literacy Environment: Supporting Literacy Skills in Children with Cochlear Implants

    Science.gov (United States)

    DesJardin, Jean L.; Ambrose, Sophie E.; Eisenberg, Laurie S.

    2011-01-01

    This study examines the home literacy environment in a group of mothers and their early-school-age children with cochlear implants (N = 16). The goals of this investigation are to (a) describe the characteristics of the home literacy environment and (b) study the relationships between home literacy factors and children's reading skills. Mothers…

  18. Phonological Patterns in the Conversational Speech of Children with Cochlear Implants

    Science.gov (United States)

    Flipsen, Peter, Jr.; Parker, Rhonda G.

    2008-01-01

    In this descriptive, longitudinal study, phonological patterns (i.e., natural phonological processes) were examined in a set of conversational speech samples obtained from six young children fitted with cochlear implants. Both developmental and non-developmental patterns were observed. This is consistent with findings from previous studies of the…

  19. Sentence Production after Listener and Echoic Training by Prelingual Deaf Children with Cochlear Implants

    Science.gov (United States)

    Golfeto, Raquel M.; de Souza, Deisy G.

    2015-01-01

    Three children with neurosensory deafness who used cochlear implants were taught to match video clips to dictated sentences. We used matrix training with overlapping components and tested for recombinative generalization. Two 3?×?3 matrices generated 18 sentences. For each matrix, we taught 6 sentences and evaluated generalization with the…

  20. Children with Cochlear Implants: A Review of Demographics and Communication Outcomes

    Science.gov (United States)

    Belzner, Kate A.; Seal, Brenda C.

    2009-01-01

    Children with severe to profound hearing loss in the United States are diverse in their racial-ethnic backgrounds, comorbid disabilities, socioeconomic levels, and communication modalities. The present article addresses demographic variables and communication outcomes of children with cochlear implants by means of a review of longitudinal studies…

  1. Analog Integrated Circuit and System Design for a Compact, Low-Power Cochlear Implant

    NARCIS (Netherlands)

    Ngamkham, W.

    2015-01-01

    Cochlear Implants (CIs) are prosthetic devices that restore hearing in profoundly deaf patients by bypassing the damaged parts of the inner ear and directly stimulating the remaining auditory nerve fibers in the cochlea with electrical pulses. This thesis describs the electronic circuit design of va

  2. Design and fabrication of stiff silicon probes: A step towards sophisticated cochlear implant electrodes

    NARCIS (Netherlands)

    Lawand, N.S.; French, P.J.; Briare, J.J.; Frijns, J.H.M.

    2011-01-01

    Cochlear implants work on the principle of direct electrical stimulation of the auditory nerve. It has advantages to replace their traditional wired electrodes by a high-density thin-film multielectrode stimulation array which is relatively small in dimensions, stable, resistant to electrolysis, and

  3. Perceptual space induced by cochlear implant all-polar stimulation mode

    DEFF Research Database (Denmark)

    Marozeau, Jeremy; Mckay, Colette M.

    2015-01-01

    It has often been argued that a main limitation of the cochlear implant is the spread of current induced by each electrode, which activates an inappropriately large range of sensory neurons. In order to reduce this spread, a new stimulation mode, the all-polar mode, was tested with 5 participants...

  4. Speech and language skills of Maltese children with bilateral cochlear implants : three case studies

    OpenAIRE

    2014-01-01

    The purpose of this study was to document the speech and language skills of three Maltese children with bilateral cochlear implants. One child was simultaneously implanted and had a hearing age (HA) of 2;10 years at the time of testing, another was sequentially implanted and had a HA of 3;06 years, while the third child was sequentially implanted and had a HA of 5;03 years. Maltese standardised speech and language assessments were used to gather information on the childre...

  5. The use of subtotal petrosectomy in cochlear implant candidates with chronic otitis media.

    Science.gov (United States)

    Szymański, Marcin; Ataide, Andre; Linder, Thomas

    2016-02-01

    Cochlear implants (CI) candidates with chronic otitis media require special attention and management. The need of opening of the inner ear creates potential routes of spread of infection to subarachnoid spaces and lead to meningitis. The aim of the study was to analyse the technique and complications of subtotal petrosectomy (SP) in cochlear implant candidates with chronic otitis media at three different CI centres. A retrospective study was carried out in three Territory Referral Hospitals. The centres follow Fisch's philosophy and surgical techniques of SP. The study group consisted of 19 patients, 4 men and 15 women, aged 12-82 years. All patients underwent SP with either primary or staged CI implantation. Indications for single or a staged management, difficulties during surgery and complications were analysed. Skin and muscle flap design in primary and revision cases as well as imaging follow-up strategy are discussed. In 14 patients implantation was performed in a single stage and in 5 cases in two stages. Follow-up ranged from 8 months to 10 years. All the patients use their implants and there were no major nor minor complications. The use of subtotal petrosectomy with cochlear implants is a safe and efficient technique when strict surgical steps and rules are applied. Closure of the external ear canal after previous meatoplasty can be challenging and extreme care dissecting the skin flaps is required. In patients with extensive cholesteatoma, active discharge from the ear with resistant bacteria or an "unstable" situation, the procedure can be staged.

  6. The Safety of MR Conditional Cochlear Implant at 1.5 Tesla Magnetic Resonance Imaging System.

    Science.gov (United States)

    Takahashi, Daisuke; Ogura, Akio; Hayashi, Norio; Seino, Shinya; Kawai, Ryosuke; Matsuda, Tsuyoshi; Doi, Tsukasa; Tsuchihashi, Toshio

    2016-08-01

    In magnetic resonance imaging (MRI) examination of the patients with the cochlear implant, only limited data have a mention for safety information in the instruction manual supplied by the manufacturers. Therefore, imaging operators require more detailed safety information for implant device. We conducted detailed examination about displacement force, torque, and demagnetizing of the cochlear implant magnet based on American Society for Testing and Materials (ASTM) standard using the PULSAR and CONCERTO (MED-EL) with 1.5 tesla MRI system. As a result, the displacement force and the torque of the implant magnet were less than the numerical values descried in the manual. Therefore, these have almost no effect on the body under the condition described in a manual. In addition, the demagnetizing factor of the cochlear implant magnet occurred by a change magnetic field. The demagnetization depended on the direction of a line of magnetic force of the static magnetic field and the implant magnet. In conclusion, the operator must warn the position of the patients on inducing in the magnet room.

  7. Encoding and decoding amplitude-modulated cochlear implant stimuli--a point process analysis.

    Science.gov (United States)

    Goldwyn, Joshua H; Shea-Brown, Eric; Rubinstein, Jay T

    2010-06-01

    Cochlear implant speech processors stimulate the auditory nerve by delivering amplitude-modulated electrical pulse trains to intracochlear electrodes. Studying how auditory nerve cells encode modulation information is of fundamental importance, therefore, to understanding cochlear implant function and improving speech perception in cochlear implant users. In this paper, we analyze simulated responses of the auditory nerve to amplitude-modulated cochlear implant stimuli using a point process model. First, we quantify the information encoded in the spike trains by testing an ideal observer's ability to detect amplitude modulation in a two-alternative forced-choice task. We vary the amount of information available to the observer to probe how spike timing and averaged firing rate encode modulation. Second, we construct a neural decoding method that predicts several qualitative trends observed in psychophysical tests of amplitude modulation detection in cochlear implant listeners. We find that modulation information is primarily available in the sequence of spike times. The performance of an ideal observer, however, is inconsistent with observed trends in psychophysical data. Using a neural decoding method that jitters spike times to degrade its temporal resolution and then computes a common measure of phase locking from spike trains of a heterogeneous population of model nerve cells, we predict the correct qualitative dependence of modulation detection thresholds on modulation frequency and stimulus level. The decoder does not predict the observed loss of modulation sensitivity at high carrier pulse rates, but this framework can be applied to future models that better represent auditory nerve responses to high carrier pulse rate stimuli. The supplemental material of this article contains the article's data in an active, re-usable format.

  8. Cochlear implantation in children with single-sided deafness: does aetiology and duration of deafness matter?

    Science.gov (United States)

    Arndt, Susan; Prosse, Susanne; Laszig, Roland; Wesarg, Thomas; Aschendorff, Antje; Hassepass, Frederike

    2015-01-01

    For adult patients with single-sided deafness (SSD), treatment with a cochlear implant (CI) is well established as an acceptable and beneficial hearing rehabilitation method administered routinely in clinical practice. In contrast, for children with SSD, CI has been applied less often to date, with the rationale to decide either on a case-by-case basis or under the realm of clinical research. The aim of our clinical study was to evaluate the longitudinal benefits of CI for a group of children diagnosed with SSD and to compare their outcomes with respect to patient characteristics. Evaluating a pool of paediatric SSD patients presenting for possible CI surgery revealed that the primary aetiology of deafness was congenital cochlear nerve deficiency. A subgroup of children meeting the CI candidacy criteria for the affected ear (the majority with acquired hearing loss) were enrolled in the study. Preliminary group results suggest substantial improvements in speech comprehension in noise and in the ability to localise sound, which was demonstrated through objective and subjective assessments after CI treatment for the group, with results varying from patient to patient. Our study shows a trend towards superior outcomes for children with acquired hearing loss and a shorter duration of hearing loss compared to congenitally deafened children who had a longer duration of SSD. This indicates an interactive influence of the age at onset, aetiology and duration of deafness upon the restoration of binaural integration and the overall benefits of sound stimulation to two ears after CI treatment. Continued longitudinal investigation of these children and further studies in larger groups may provide more guidance on the optimal timing of treatment for paediatric patients with acquired and congenital SSD.

  9. Neuroradiological imaging in patients with sensorineural hearing loss prior to cochlear implantation; Neuroradiologische Diagnostik bei Patienten mit sensorineuralem Hoerverlust vor Cochlea-Implantation

    Energy Technology Data Exchange (ETDEWEB)

    Biller, A.; Bartsch, A.; Solymosi, L.; Bendszus, M. [Abteilung fuer Neuroradiologie, Universitaet Wuerzburg (Germany); Knaus, C.; Mueller, J. [Klinik und Poliklinik fuer Hals-, Nasen- und Ohrenkranke, Universitaet Wuerzburg (Germany)

    2007-09-15

    Cochlear implantation (CI) is an established technique for enabling speech perception in patients suffering from severe bilateral sensorineural hearing loss (SNHL). Thorough preoperative radiological assessment is essential for correctly evaluating the indication for surgery and safely performing cochlear implantation. CT and conventional and functional MRI are available for radiological assessment. Therefore, knowledge of the most frequent congenital syndromal, non-syndromal, and acquired malformations of inner ear structures is fundamental. This article provides information about imaging techniques prior to CI and relevant malformations of the inner ear. Safety aspects for patients with a cochlear implant undergoing MR imaging are also discussed. (orig.)

  10. Cochlear implantation in Pendred syndrome and non-syndromic enlarged vestibular aqueduct - clinical challenges, surgical results, and complications

    DEFF Research Database (Denmark)

    Mey, Kristianna; Bille, Michael; Cayé-Thomasen, Per

    2016-01-01

    or on populations with mixed cochlear malformations. PS/NSEVA accounts for up to 10% of congenital SNHL, rendering this a large group of cochlear implant candidates. The abnormal inner ear anatomy of these patients may be associated with a lower surgical success rate and a higher rate of complications. STUDY DESIGN...

  11. Technology developments to initiate a next generation of cochlear implants.

    Science.gov (United States)

    Volckaerts, B; Corless, A R; Mercanzini, A; Silmon, A M; Bertsch, A; Van Himbeeck, C; Wasikiewicz, J; Vanden Bulcke, M; Vadgama, P; Renaud, P

    2007-01-01

    In the framework of the EU-supported research project Healthy Aims, we developed a range of novel electrode arrays and related technologies for use in hearing prosthesis. This paper summarizes our ongoing research activities on alternative electrode manufacturing routes, functional electrode interfaces and smart intra-cochlear and intra-modiolus electrode arrays.

  12. Studies on bilateral cochlear implants at the University of Wisconsin's Binaural Hearing and Speech Laboratory.

    Science.gov (United States)

    Litovsky, Ruth Y; Goupell, Matthew J; Godar, Shelly; Grieco-Calub, Tina; Jones, Gary L; Garadat, Soha N; Agrawal, Smita; Kan, Alan; Todd, Ann; Hess, Christi; Misurelli, Sara

    2012-06-01

    This report highlights research projects relevant to binaural and spatial hearing in adults and children. In the past decade we have made progress in understanding the impact of bilateral cochlear implants (BiCIs) on performance in adults and children. However, BiCI users typically do not perform as well as normal hearing (NH) listeners. In this article we describe the benefits from BiCIs compared with a single cochlear implant (CI), focusing on measures of spatial hearing and speech understanding in noise. We highlight the fact that in BiCI listening the devices in the two ears are not coordinated; thus binaural spatial cues that are available to NH listeners are not available to BiCI users. Through the use of research processors that carefully control the stimulus delivered to each electrode in each ear, we are able to preserve binaural cues and deliver them with fidelity to BiCI users. Results from those studies are discussed as well, with a focus on the effect of age at onset of deafness and plasticity of binaural sensitivity. Our work with children has expanded both in number of subjects tested and age range included. We have now tested dozens of children ranging in age from 2 to 14 yr. Our findings suggest that spatial hearing abilities emerge with bilateral experience. While we originally focused on studying performance in free field, where real world listening experiments are conducted, more recently we have begun to conduct studies under carefully controlled binaural stimulation conditions with children as well. We have also studied language acquisition and speech perception and production in young CI users. Finally, a running theme of this research program is the systematic investigation of the numerous factors that contribute to spatial and binaural hearing in BiCI users. By using CI simulations (with vocoders) and studying NH listeners under degraded listening conditions, we are able to tease apart limitations due to the hardware/software of the CI

  13. Anestesia local e sedação para cirurgia de implante coclear: uma alternativa possível Local anesthesia for cochlear implant surgery: a possible alternative

    Directory of Open Access Journals (Sweden)

    Rogério Hamerschmidt

    2010-10-01

    doing the cochlear implant surgery with this kind of anesthesia, with a fast recovery, no symptoms of dizziness and vomiting after the surgery, and very few complaints from the patient. CONCLUSION: local anesthesia with sedation for cochlear implant surgery in adults is a very good alternative for lowering the morbidity for the patient. It bears fewer risks, low costs for the hospital, with a very good procedure control, being very useful for older patients or the ones that have contraindications for general anesthesia.

  14. STATIC AND DYNAMIC POSTURE CONTROL IN POSTLINGUAL COCHLEAR IMPLANTED PATIENTS: Effects of dual-tasking, visual and auditory inputs suppression

    Directory of Open Access Journals (Sweden)

    BERNARD DEMANZE eLaurence

    2014-01-01

    Full Text Available Posture control is based on central integration of multisensory inputs, and on internal representation of body orientation in space. This multisensory feedback regulates posture control and continuously updates the internal model of body’s position which in turn forwards motor commands adapted to the environmental context and constraints. The peripheral localization of the vestibular system, close to the cochlea, makes vestibular damage possible following cochlear implant (CI surgery. Impaired vestibular function in CI patients, if any, may have a strong impact on posture stability. The simple postural task of quiet standing is generally paired with cognitive activity in most day life conditions, leading therefore to competition for attentional resources in dual-tasking, and increased risk of fall particularly in patients with impaired vestibular function. This study was aimed at evaluating the effects of post-lingual cochlear implantation on posture control in adult deaf patients. Possible impairment of vestibular function was assessed by comparing the postural performance of patients to that of age-matched healthy subjects during a simple postural task performed in static and dynamic conditions, and during dual-tasking with a visual or auditory memory task. Postural tests were done in eyes open (EO and eyes closed (EC conditions, with the cochlear implant activated (ON or not (OFF. Results showed that the CI patients significantly reduced limits of stability and increased postural instability in static conditions. In dynamic conditions, they spent considerably more energy to maintain equilibrium, and their head was stabilized neither in space nor on trunk while the controls showed a whole body rigidification strategy. Hearing (prosthesis on as well as dual-tasking did not really improve the dynamic postural performance of the CI patients. We conclude that CI patients become strongly visual dependent mainly in challenging postural conditions.

  15. Comparisons of Auditory Performance and Speech Intelligibility after Cochlear Implant Reimplantation in Mandarin-Speaking Users

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    Chung-Feng Hwang

    2016-01-01

    Full Text Available Objectives. We evaluated the causes, hearing, and speech performance before and after cochlear implant reimplantation in Mandarin-speaking users. Methods. In total, 589 patients who underwent cochlear implantation in our medical center between 1999 and 2014 were reviewed retrospectively. Data related to demographics, etiologies, implant-related information, complications, and hearing and speech performance were collected. Results. In total, 22 (3.74% cases were found to have major complications. Infection (n=12 and hard failure of the device (n=8 were the most common major complications. Among them, 13 were reimplanted in our hospital. The mean scores of the Categorical Auditory Performance (CAP and the Speech Intelligibility Rating (SIR obtained before and after reimplantation were 5.5 versus 5.8 and 3.7 versus 4.3, respectively. The SIR score after reimplantation was significantly better than preoperation. Conclusions. Cochlear implantation is a safe procedure with low rates of postsurgical revisions and device failures. The Mandarin-speaking patients in this study who received reimplantation had restored auditory performance and speech intelligibility after surgery. Device soft failure was rare in our series, calling attention to Mandarin-speaking CI users requiring revision of their implants due to undesirable symptoms or decreasing performance of uncertain cause.

  16. Children using Cochlear Implants Capitalize on Acoustical Hearing for Music Perception

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    Talar eHopyan

    2012-10-01

    Full Text Available Cochlear implants (CIs electrically stimulate the auditory nerve providing children who are deaf with access to speech and music. Because of device limitations, it was hypothesized that children using CIs develop abnormal perception of musical cues. Perception of pitch and rhythm as well as memory for music was measured by the children’s version of the Montreal Battery of Amusia (MBEA in 23 unilateral CI users and 22 age-matched children with normal hearing. Children with CIs were less accurate than their normal hearing peers (p<0.05. CI users were best able to discern rhythm changes (p < .01 and to remember musical pieces (p < .01. Contrary to expectations, abilities to hear cues in music improved as the age at implantation increased (p < .01. Further analyses revealed that this was because the children implanted at older ages also had better low frequency hearing prior to cochlear implantation and were able to use this hearing prior to cochlear implantation by wearing hearing aids. Access to early acoustical hearing in the lower frequency ranges appears to establish a base for music perception, which can be accessed with later electrical CI hearing.

  17. Real-life performance considerations of four pediatric multi-channel cochlear implant recipients.

    Science.gov (United States)

    Vidas, S; Hassan, R; Parnes, L S

    1992-12-01

    Most pediatric cochlear implant programs support a team approach for post-implant services. However, individuals directly involved in the care of these children often have differing opinions on the child's performance. We describe our experience with four children, aged 3 to 10 at the time of implantation, who have used the Nucleus 22-channel cochlear implant device for at least nine months. A questionnaire, focusing on the individual's observations of the child's speech and hearing performance in their particular setting (i.e., clinic, home, school), was completed by the child's parent(s), therapist and classroom teacher. Overall, performance in structured settings (i.e., testing and therapy sessions) was not in agreement with performance in unstructured settings (i.e., classroom and home environments). The results suggest that different individuals interacting with the same child in different environments often have differing perceptions of the child's performance. Based on the information obtained on the four cases, we discuss factors to consider in assessing the real-life performance of pediatric cochlear implant recipients.

  18. The effect of age of cochlear implantation on vocal characteristics in children

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    Kerry Knight

    2016-02-01

    Full Text Available Background: Early cochlear implantation aids auditory feedback and supports better communication and self-monitoring of the voice. The objective of this study was to determine whether the age of cochlear implantation has an impact on vocal development in children implanted before age 4.Method and procedures: The study consisted of 19 participants in total. All implant recipients (experimental group were 3–5 years post-implantation, including four prelingual (0–2 years and five perilingual (2–4 years implant recipients. The control group consisted of 10 children whose hearing was within normal limits between the ages 3–6 years and 10 months, which was compared to the experimental group. Established paediatric norms were used for additional comparison. A questionnaire was used to gather information from each of the participant’s caregivers to determine whether other personal and contextual factors had an impact on voice production. An acoustic analysis was conducted for each participant using the Multi-Dimensional Voice Program of the Computerized Speech Lab.Results: When the experimental group and the control group were compared, similar results were yielded for fundamental frequency and short-term perturbation (jitter and shimmer. More variability was noted in long-term frequency and amplitude measures, with significantly higher differences, and therefore further outside the norms, in the prelingual group when compared to the perilingual and control groups.Conclusion: In this study, age of implantation did not impact vocal characteristics. Further research should include larger sample sizes, with participants that are age and gender matched.Keywords: cochlear implant; vocal development; age of implantation; prelingual; lingual

  19. Estimating the Influence of Cochlear Implantation on Language Development in Children.

    Science.gov (United States)

    Geers, Ann E; Nicholas, Johanna G; Moog, Jean S

    2007-01-01

    Research studies reviewed here have identified a wide variety of factors that may influence a child's auditory, speech and language development following cochlear implantation. Intrinsic characteristics of the implanted child, including gender, family socio-economic status, age at onset of hearing loss and pre-implant residual hearing may predispose a child to greater or lesser post-implant benefit. Intervention characteristics that may influence outcome include age of the child when deafness is identified and amplification and habilitation is initiated, the communication mode used with the child and the type of classroom/therapy employed. Characteristics of the implant itself include generation of technology used, the age of the child when implant stimulation is initiated, and the amount of time the child has used the implant. These factors interact in unpredictable ways, so that isolated correlations between predictor variables and outcome scores may be difficult to interpret. Results for two independent samples of orally-educated children tested by different laboratories were compared using multiple regression analysis to illustrate interactions among predictor variables. Four predictor variables accounted for a similar proportion of variance (23% and 24%) in receptive vocabulary (PPVT) outcome scores in each sample. A unique predictor was then added to each analysis. The addition of pre-implant aided threshold not only increased the total variance accounted for to almost 40%, but also increased the effect of implant age as a predictor variable. A different result was observed in the other sample, were the added predictor variable was nonverbal IQ, where the estimated contribution of implant age was reduced. The current analysis suggests that future analyses minimally control for independent contributions of implant age, nonverbal IQ, and pre-implant aided thresholds when examining expected outcomes. Children in both samples who received a cochlear implant

  20. Ophthalmological screening of a paediatric cochlear implant population: a retrospective analysis and 12-year follow-up.

    LENUS (Irish Health Repository)

    Falzon, K

    2010-06-01

    To determine the nature and prevalence of ophthalmological findings for a cohort of children in a paediatric cochlear implant program and to assist the clinician in devising an investigative plan for this population.

  1. Self-esteem and social well-being of children with cochlear implant compared to normal-hearing children

    DEFF Research Database (Denmark)

    Percy-Smith, L.; Caye-Thomasen, P.; Gudman, M.

    2008-01-01

    Objective: The purpose of this study was to make a quantitative comparison of parameters of self-esteem and social well-being between children with cochlear implants and normal-hearing children. Material and methods: Data were obtained from 164 children with cochlear implant (CI) and 2169 normal......-hearing children (NH). Parental questionnaires, used in a national survey assessing the self-esteem and well-being of normal-hearing children, were applied to the cochlear implanted group, in order to allow direct comparisons. Results: The children in the CI group rated significantly higher on questions about well...... overall self-esteem or number of friends. The two groups of children scored similarly on being confident, independent, social, not worried and happy. Conclusion: Children with cochlear implant score equal to or better than their normal-hearing peers on matters of self-esteem and social well-being. (C...

  2. Aspects of temporal bone anatomy and pathology in conjunction with cochlear implant surgery

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    Stjernholm, Christina [Karolinska Inst., Stockholm (Sweden). Soedersjukhuset

    2003-07-01

    Cochlear implantation is a treatment for patients with severe sensorineural hearing loss/deafness, who get no help from ordinary hearing aids. The cochlear implant is surgically placed under the skin near the ear and a very thin electrode array is introduced into the cochlea of the inner ear, where it stimulates the remaining nerve fibers. The operation is complicated; it is performed with the aid of a microscope, and involves drilling very close to vital vessels and important nerves. High resolution computed tomography (CT) of the temporal bone is a part of the preoperative evaluation preceding cochlear implantation. It is a method for visualizing the bony structures of the middle and inner ear - to diagnose pathology and to describe the anatomy. The first work concerns CT of the temporal bone and cochlear implant surgery in children with CHARGE association. This is a rare condition with multiple congenital abnormalities, sometimes lethal. Children with CHARGE have different combinations of disabilities, of which impairments of vision and hearing, as well as balance problems and facial palsy can lead to developmental delay. There have been few reports of radiological temporal bone changes and none of cochlear implant surgery for this group. The work includes a report of the findings on preoperative CT and at surgery, as well as postimplant results in two children. A review of the latest diagnostic criteria of CHARGE and the temporal bone changes found in international literature is also included. The conclusion was that certain combinations of temporal bone changes in CHARGE are, if not specific, at least extremely rare in other materials. CT can visualize these changes and be used as a diagnostic tool. This is important, since some of the associated disabilities are not so obvious from the start. Early treatment is vital for the child's development. This work also shows that cochlear implantation may help some of these often very isolated children to

  3. Cochlear implant electrode localization in post-operative CT using a spherical measure

    DEFF Research Database (Denmark)

    Braithwaite, Benjamin Michael; Kjer, Hans Martin; Fagertun, Jens;

    2016-01-01

    the ordering of electrode contacts on implanted electrode arrays from post-operative CT images. Our method applies a specialized filter chain to the images based on a threshold and spherical measure, and selects contact positions at local maxima in the filtered image. Two datasets of 13 temporal bone specimens......When implanting cochlear implants the positions of electrodes have a large impact on the quality of the restored hearing. Due to metal artifacts it is difficult to estimate the precise location in post-operative scans. In this paper we present a method for automatically locating and determining...

  4. The comparison of balance performance among children with cochlear implantation, post-aural aid and normal children

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    Arezoo Ahmad pour

    2014-11-01

    Full Text Available Background: This cross-sectional study was carried out to compare balance performance between children with cochlear implants and post-aural aid and normal children. Methods: The present study was done on 67 severe to profound hearing impaired children. Of these, 21 children with an average age of 7 years and 4 months (±1.7 wore cochlear implant, 46 children with an average age of 7 years and 7 months (±1.7 wore post-aural aid and 60 children with an average 8 years and one month (±11 months were considered as a control group. All of the children were tested with the 9-stage balance subtest of Bruininks-Oseretsky Test of Motor Proficiency2 (BOT2. Results: The mean total BOT2 score of hearing impaired children was significantly lower than the normal group (P≤0.001. The mean total BOT2 score among children with cochlear implant, post-aural aids and normal group showed that cochlear implant group significantly performed weaker than the other two groups (P≤0.001. Conclusion: Hearing impaired children particularly children with cochlear implant are exposed to the risk of balance deficit. Hearing impaired children specially those who wear cochlear implants must be screened for vestibular hypofunction.

  5. Cochlear implantations in children with Waardenburg syndrome: an electrophysiological and psychophysical review.

    Science.gov (United States)

    Pau, Henry; Gibson, William P R; Gardner-Berry, Kirsty; Sanli, Halit

    2006-12-01

    Waardenburg syndrome presents with dystopia canthorum, pigmentary abnormalities of hair, iris and skin (often a white forelock and heterochromia iridis) and sensorineural deafness. The authors review the electrophysiological and psychophysical findings of implanted children with Waardenburg syndrome at the Sydney Cochlear Implant Centre. Twenty children with Waardenburg syndrome received cochlear implants between 1985 and 2001. Electrical auditory brainstem response (EABR) was performed in all of these patients intra-operatively as part of the routine investigations. Only 13 of these patients were assessed one year or more post-operatively by means of the Melbourne Categories (0-7). Four patients (20%) were found to have abnormal EABR recordings. The mode of Melbourne Categories in this group (n = 3) was 1 at one year post-operation. The other 16 patients were found to have normal EABR and the mode of Melbourne Categories in this group (n = 10) was 7. A poor outcome after cochlear implantation was associated with abnormal EABR recordings (a 'true' auditory neuropathy) and was found in a significant proportion of patients with Waardenburg syndrome.

  6. Evolution of impedance field telemetry after one day of activation in cochlear implant recipients

    Science.gov (United States)

    Tsai, Chia-Mi; Chen, Hsing-Yi; Tung, Tao-Hsin; Li, Lieber Po-Hung

    2017-01-01

    Objectives Changes in impedance between 24 hours and one month after cochlear implantation have never been explored due to the inability to switch on within one day. This study examined the effect of early activation (within 24 hours) on the evolution of electrode impedance with the aim of providing information on the tissue-to-electrode interface when electrical stimulation was commenced one day post implantation. Methods We performed a retrospective review at a single institution. Patients who received a Nucleus 24RECA implant system (Cochlear, Sydney, Australia) and underwent initial switch-on within 24 hours postoperatively were included. Impedance measurements were obtained intraoperatively and postoperatively at 1 day, 1 week, 4 weeks, and 8 weeks. Results A significant drop in impedance was noted 1 day after an initial activation within 24 hours followed by a significant rise in impedance in all channels until 1 week, after which the impedance behaved differently in different segments. Basal and mid-portion electrodes revealed a slight increase while apical electrodes showed a slight decrease in impedance from 1 week to 8 weeks postoperatively. Impedance was relatively stable 4 weeks after surgery. Conclusions This is the first study to report the evolution of impedance in all channels between initial mapping 1 day and 1 month after cochlear implantation. The underlying mechanism for the differences in behavior between different segments of the electrode may be associated with the combined effect of dynamics among the interplay of cell cover formation, electrical stimulation, and fibrotic reaction. PMID:28264044

  7. Unilateral Cochlear Implantation Reduces Tinnitus Loudness in Bimodal Hearing: A Prospective Study

    Science.gov (United States)

    Servais, Jérôme J.; Hörmann, Karl; Wallhäusser-Franke, Elisabeth

    2017-01-01

    Perceptive and receptive aspects of subjective tinnitus like loudness and tinnitus-related distress are partly independent. The high percentage of hearing loss in individuals with tinnitus suggests causality of hearing impairment particularly for the tinnitus percept, leading to the hypothesis that restoration of auditory input has a larger effect on tinnitus loudness than on tinnitus-related distress. Furthermore, it is assumed that high levels of depression or anxiety prevent reductions of tinnitus loudness and distress following restoration of activity in the cochlea. This prospective study investigated the influence of unilateral cochlear implant (CI) on tinnitus in 19 postlingually deafened adults during 6 months following implantation. All had bimodal provision with the other ear being continuously supported by a hearing aid. On the day before CI implantation (T1, T2), and at about 3 and 6 months postsurgery (T3, T4), participants were questioned about their current tinnitus. Loudness was rated on a Numeric Rating Scale, distress was assessed by the TQ12 Tinnitus Questionnaire, and depression and anxiety were recorded with the Hospital Anxiety and Depression Scale. At T2, 79% experienced tinnitus, one participant developed tinnitus after implantation. Following implantation, tinnitus loudness was reduced significantly by 42%, while reductions in tinnitus-related distress (−24%), depression (−20%), and anxiety (−20%) did not attain statistical significance. Significant correlations existed between tinnitus measures, and between postimplantation tinnitus-related distress and anxiety and depression scores. Moreover, improvement of hearing in the CI ear was significantly correlated with reduction in tinnitus loudness. A new aspect of this study is the particular influence of CI provision on perceptive aspects of preexisting tinnitus (hypothesis 1), with the effect size regarding postimplant reduction of perceived tinnitus loudness (1.40) being much

  8. Advanced beamformers for cochlear implant users: acute measurement of speech perception in challenging listening conditions.

    Directory of Open Access Journals (Sweden)

    Andreas Buechner

    Full Text Available OBJECTIVE: To investigate the performance of monaural and binaural beamforming technology with an additional noise reduction algorithm, in cochlear implant recipients. METHOD: This experimental study was conducted as a single subject repeated measures design within a large German cochlear implant centre. Twelve experienced users of an Advanced Bionics HiRes90K or CII implant with a Harmony speech processor were enrolled. The cochlear implant processor of each subject was connected to one of two bilaterally placed state-of-the-art hearing aids (Phonak Ambra providing three alternative directional processing options: an omnidirectional setting, an adaptive monaural beamformer, and a binaural beamformer. A further noise reduction algorithm (ClearVoice was applied to the signal on the cochlear implant processor itself. The speech signal was presented from 0° and speech shaped noise presented from loudspeakers placed at ±70°, ±135° and 180°. The Oldenburg sentence test was used to determine the signal-to-noise ratio at which subjects scored 50% correct. RESULTS: Both the adaptive and binaural beamformer were significantly better than the omnidirectional condition (5.3 dB±1.2 dB and 7.1 dB±1.6 dB (p<0.001 respectively. The best score was achieved with the binaural beamformer in combination with the ClearVoice noise reduction algorithm, with a significant improvement in SRT of 7.9 dB±2.4 dB (p<0.001 over the omnidirectional alone condition. CONCLUSIONS: The study showed that the binaural beamformer implemented in the Phonak Ambra hearing aid could be used in conjunction with a Harmony speech processor to produce substantial average improvements in SRT of 7.1 dB. The monaural, adaptive beamformer provided an averaged SRT improvement of 5.3 dB.

  9. Indication criteria for cochlear implants and hearing aids: impact of audiological and non-audiological findings

    Directory of Open Access Journals (Sweden)

    Sabine Haumann

    2012-08-01

    Full Text Available Owing to technological progress and a growing body of clinical experience, indication criteria for cochlear implants (CI are being extended to less severe hearing impairments. It is, therefore, worth reconsidering these indication criteria by introducing novel testing procedures. The diagnostic evidence collected will be evaluated. The investigation includes postlingually deafened adults seeking a CI. Prior to surgery, speech perception tests [Freiburg Speech Test and Oldenburg sentence (OLSA test] were performed unaided and aided using the Oldenburg Master Hearing Aid (MHA system. Linguistic skills were assessed with the visual Text Reception Threshold (TRT test, and general state of health, socio-economic status (SES and subjective hearing were evaluated through questionnaires. After surgery, the speech tests were repeated aided with a CI. To date, 97 complete data sets are available for evaluation. Statistical analyses showed significant correlations between postsurgical speech reception threshold (SRT measured with the adaptive OLSA test and pre-surgical data such as the TRT test (r=-0.29, SES (r=-0.22 and (if available aided SRT (r=0.53. The results suggest that new measures and setups such as the TRT test, SES and speech perception with the MHA provide valuable extra information regarding indication for CI.

  10. Comparison of two methods for selecting minimum stimulation levels used in programming the Nucleus 22 cochlear implant.

    Science.gov (United States)

    Skinner, M W; Holden, L K; Holden, T A; Demorest, M E

    1999-08-01

    Minimum stimulation levels for active electrodes in a Nucleus 22 cochlear implant were set at threshold (clinical default value) and raised levels (M = +2.04 dB) to determine if raised levels would improve recipients' understanding of soft speech sounds with the SPEAK speech coding strategy. Eight postlinguistically deaf adults participated in a 4-phase A1B1A2B2 test design. Speech recognition was evaluated with consonant-vowel nucleus-consonant (CNC) words in quiet and sentences in noise, both presented at 50, 60, and 70 dB SPL during 2 weekly sessions at the end of each phase. Group mean scores were significantly higher with the raised level program for words and phonemes at 50 and 60 dB SPL and for sentences at 50 and 70 dB SPL. All participants chose to use the raised level program in everyday life at the end of the study. The results suggest that clinical use of a raised level program for Nucleus 22 recipients has the potential to make soft sounds louder and, therefore, more salient in everyday life. Further research is needed to determine if this approach is appropriate for other cochlear implant devices.

  11. Adult human nasal mesenchymal-like stem cells restore cochlear spiral ganglion neurons after experimental lesion.

    Science.gov (United States)

    Bas, Esperanza; Van De Water, Thomas R; Lumbreras, Vicente; Rajguru, Suhrud; Goss, Garrett; Hare, Joshua M; Goldstein, Bradley J

    2014-03-01

    A loss of sensory hair cells or spiral ganglion neurons from the inner ear causes deafness, affecting millions of people. Currently, there is no effective therapy to repair the inner ear sensory structures in humans. Cochlear implantation can restore input, but only if auditory neurons remain intact. Efforts to develop stem cell-based treatments for deafness have demonstrated progress, most notably utilizing embryonic-derived cells. In an effort to bypass limitations of embryonic or induced pluripotent stem cells that may impede the translation to clinical applications, we sought to utilize an alternative cell source. Here, we show that adult human mesenchymal-like stem cells (MSCs) obtained from nasal tissue can repair spiral ganglion loss in experimentally lesioned cochlear cultures from neonatal rats. Stem cells engraft into gentamicin-lesioned organotypic cultures and orchestrate the restoration of the spiral ganglion neuronal population, involving both direct neuronal differentiation and secondary effects on endogenous cells. As a physiologic assay, nasal MSC-derived cells engrafted into lesioned spiral ganglia demonstrate responses to infrared laser stimulus that are consistent with those typical of excitable cells. The addition of a pharmacologic activator of the canonical Wnt/β-catenin pathway concurrent with stem cell treatment promoted robust neuronal differentiation. The availability of an effective adult autologous cell source for inner ear tissue repair should contribute to efforts to translate cell-based strategies to the clinic.

  12. A PDA platform for offline processing and streaming of stimuli for cochlear implant research.

    Science.gov (United States)

    Ali, Hussnain; Lobo, Arthur P; Loizou, Philipos C

    2011-01-01

    A PDA-based research platform has been developed for implementing novel speech processing strategies and conducting psychophysical experiments with cochlear implant (CI) research that do not necessarily require real-time processing. The developed interface streams stimuli pulses to a CI unit in an offline mode from a Personal Computer via PDA platform using Windows Sockets (WINSOCK). Front-end of the application is run in MATLAB where stimuli pulses are created. Winsock establishes a TCP/IP connection with the PDA and starts the transmission of stimuli data. Server application installed on the PDA reads the stimulation data and forwards it to the SDIO board in packets where it is forwarded to the cochlear implant unit and pulses are then played in realtime. Versatility and flexibility are the key characteristics of the platform for easy implementation and testing of a wide range of applications and experiments without advanced programming skills.

  13. [Improvement of clinical results by digitalization of a single channel cochlear implant].

    Science.gov (United States)

    Fugain, C; Jacquier, I; Monneron, L; Secqueville, T; Meyer, B; Chouard, C H

    1992-01-01

    For 1973 we have been among the first to claim the multichannel cochlear implant superiority regarding single channel efficacy. However we actually thing that single channel cochlear implant is indispensable in case of total ossified cochlea, and very useful when efficacy/coast ratio must be considered. In order to narrow the gap between multi and single channel device efficacy, we used the new microprocessors possibilities to digitalize the analogic emietter of the single channel system, which we designed in 1987. Owing to a PC keyboard the new emietter allows the speech therapist to select the frequency band width of the input signal, and to determine the threshold level and the dynamic value as a function of six steps values of the stimulus wave frequency. These improvements supply the patient with a better speech intelligibility excepted for vowels discrimination. Comparison of clinical results obtained through the two analogic and digital systems are reported on 4 post lingually and 4 pre lingually deaf patients.

  14. Cognitive factors and cochlear implants: some thoughts on perception, learning, and memory in speech perception.

    Science.gov (United States)

    Pisoni, D B

    2000-02-01

    Over the past few years, there has been increased interest in studying some of the cognitive factors that affect speech perception performance of cochlear implant patients. In this paper, I provide a brief theoretical overview of the fundamental assumptions of the information-processing approach to cognition and discuss the role of perception, learning, and memory in speech perception and spoken language processing. The information-processing framework provides researchers and clinicians with a new way to understand the time-course of perceptual and cognitive development and the relations between perception and production of spoken language. Directions for future research using this approach are discussed including the study of individual differences, predicting success with a cochlear implant from a set of cognitive measures of performance and developing new intervention strategies.

  15. Cochlear Implantation in Isolated Large Vestibular Aqueduct Syndrome: Report of Three Cases and Literature Review

    Directory of Open Access Journals (Sweden)

    Pradhananga, Rabindra

    2014-11-01

    Full Text Available Introduction Large vestibular aqueduct syndrome (LVAS is characterized by the enlargement of the vestibular aqueduct associated with sensorineural hearing loss. It is the most common radiographically detectable inner ear anomaly in congenital hearing loss. LVAS may occur as an isolated anomaly or in association with other inner ear malformations. Objective To report three cases of isolated LVAS with a focus on preoperative assessment, surgical issues, and short-term postoperative follow-up with preliminary auditory habilitation outcomes. Resumed Report One girl and two boys with LVAS were assessed and cochlear implantation was performed for each. Various ways of intraoperative management of cerebrospinal fluid gusher and postoperative care and outcomes are reported. Conclusion Cochlear implantation in the deaf children with LVAS is feasible and effective.

  16. Psychophysics, fitting, and signal processing for combined hearing aid and cochlear implant stimulation.

    Science.gov (United States)

    Francart, Tom; McDermott, Hugh J

    2013-01-01

    The addition of acoustic stimulation to electric stimulation via a cochlear implant has been shown to be advantageous for speech perception in noise, sound quality, music perception, and sound source localization. However, the signal processing and fitting procedures of current cochlear implants and hearing aids were developed independently, precluding several potential advantages of bimodal stimulation, such as improved sound source localization and binaural unmasking of speech in noise. While there is a large and increasing population of implantees who use a hearing aid, there are currently no generally accepted fitting methods for this configuration. It is not practical to fit current commercial devices to achieve optimal binaural loudness balance or optimal binaural cue transmission for arbitrary signals and levels. There are several promising experimental signal processing systems specifically designed for bimodal stimulation. In this article, basic psychophysical studies with electric acoustic stimulation are reviewed, along with the current state of the art in fitting, and experimental signal processing techniques for electric acoustic stimulation.

  17. Facilitating Vocabulary Acquisition of Children With Cochlear Implants Using Electronic Storybooks.

    Science.gov (United States)

    Messier, Jane; Wood, Carla

    2015-10-01

    The present intervention study explored the word learning of 18 children with cochlear implants in response to E-book instruction. Capitalizing on the multimedia options available in electronic storybooks, the intervention incorporated videos and definitions to provide a vocabulary intervention that includes evidence-based teaching strategies. The extent of the children's word learning was assessed using three assessment tasks: receptive pointing, expressively labeling, and word defining. Children demonstrated greater immediate expressive labeling gains and definition generation gains for words taught in the treatment condition compared to those in the comparison condition. In addition, the children's performance on delayed posttest vocabulary assessments indicated better retention across the expressive vocabulary task for words taught within the treatment condition as compared to the comparison condition. Findings suggest that children with cochlear implants with functional speech perception can benefit from an oral-only multimedia-enhanced intensive vocabulary instruction.

  18. Dichotic Listening Can Improve Perceived Clarity of Music in Cochlear Implant Users

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    Nicolas Vannson

    2015-08-01

    Full Text Available Musical enjoyment for cochlear implant (CI recipients is often reported to be unsatisfactory. Our goal was to determine whether the musical experience of postlingually deafened adult CI recipients could be enriched by presenting the bass and treble clef parts of short polyphonic piano pieces separately to each ear (dichotic. Dichotic presentation should artificially enhance the lateralization cues of each part and help the listeners to better segregate them and thus provide greater clarity. We also hypothesized that perception of the intended emotion of the pieces and their overall enjoyment would be enhanced in the dichotic mode compared with the monophonic (both parts in the same ear and the diotic mode (both parts in both ears. Twenty-eight piano pieces specifically composed to induce sad or happy emotions were selected. The tempo of the pieces, which ranged from lento to presto covaried with the intended emotion (from sad to happy. Thirty participants (11 normal-hearing listeners, 11 bimodal CI and hearing-aid users, and 8 bilaterally implanted CI users participated in this study. Participants were asked to rate the perceived clarity, the intended emotion, and their preference of each piece in different listening modes. Results indicated that dichotic presentation produced small significant improvements in subjective ratings based on perceived clarity. We also found that preference and clarity ratings were significantly higher for pieces with fast tempi compared with slow tempi. However, no significant differences between diotic and dichotic presentation were found for the participants’ preference ratings, or their judgments of intended emotion.

  19. Cochlear implantation effect on deaf children with gap junction protein beta 2 gene mutation

    Institute of Scientific and Technical Information of China (English)

    KONG Ying; LIU Sha; WANG Su-ju; Li Shu-jing; LIANG Shuang

    2013-01-01

    Background The popularization and promotion of gene diagnosis technology makes it possible to detect deafness genes for children with congenital hearing impairment,and the proportion of gap junction protein beta 2 (GJB2) gene mutations in cochlear implant patients is 26.5% We did follow-up evaluation on auditory rehabilitation effect for all 31 deaf children with GJB2 gene mutation after cochlear implantation to provide a reference for such patients.Methods Application of “the genetic deafness gene chip detection kit” and “gene complete sequence analysis” were applied to conduct detection on common genetic deafness gene mutation hotspots of the hearing impaired children with cochlear implantation.To conduct auditory rehabilitation effect evaluation on all 31 cases of patients with GJB2 genetic deafness after 3,6 and 12 months of the operation respectively.The single factor repeated measure analysis of variance (ANOVA) was applied to analysis whether there were significant difference among the results of initial consonant of a Chinese syllable recognition at 3 different stages after the operation,the results of vowel of a Chinese syllable recognition at 3 different stages after the operation,and the results of two-syllable recognition at 3 different stages after the operation.Results The 235delC is the high-incidence mutational site in 31 cases of patients with GJB2 genetic deafness,and the total detection rate is up to 90.3% (28/31).There were significant differences in the initial consonant and the vowel of a Chinese syllable recognition rate,and the two-syllable recognition rates at 3,6,and 12 months after the operation (P<0.01).Conclusion Cochlear implantation is a safe and effective measure for auditory reconstruction,enabling patients with GJB2 hereditary severe sensorineural deafness to achieve auditory speech recognition effectively.

  20. A multi-band environment-adaptive approach to noise suppression for cochlear implants.

    Science.gov (United States)

    Saki, Fatemeh; Mirzahasanloo, Taher; Kehtarnavaz, Nasser

    2014-01-01

    This paper presents an improved environment-adaptive noise suppression solution for the cochlear implants speech processing pipeline. This improvement is achieved by using a multi-band data-driven approach in place of a previously developed single-band data-driven approach. Seven commonly encountered noisy environments of street, car, restaurant, mall, bus, pub and train are considered to quantify the improvement. The results obtained indicate about 10% improvement in speech quality measures.

  1. Longitudinal Analysis of the Absence of Intraoperative Neural Response Telemetry in Children using Cochlear Implants

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    Moura, Amanda Christina Gomes de

    2014-07-01

    Full Text Available Introduction Currently the cochlear implant allows access to sounds in individuals with profound hearing loss. The objective methods used to verify the integrity of the cochlear device and the electrophysiologic response of users have noted these improvements. Objective To establish whether the evoked compound action potential of the auditory nerve can appear after electrical stimulation when it is absent intraoperatively. Methods The clinical records of children implanted with the Nucleus Freedom (Cochlear Ltd., Australia (CI24RE cochlear implant between January 2009 and January 2010 with at least 6 months of use were evaluated. The neural response telemetry (NRT thresholds of electrodes 1, 6, 11, 16, and 22 during surgery and after at least 3 months of implant use were analyzed and correlated with etiology, length of auditory deprivation, and chronological age. These data were compared between a group of children exhibiting responses in all of the tested electrodes and a group of children who had at least one absent response. Results The sample was composed of clinical records of 51 children. From these, 21% (11 showed no NRT in at least one of the tested electrodes. After an average of 4.9 months of stimulation, the number of individuals exhibiting absent responses decreased from 21 to 11% (n = 6. Conclusion It is feasible that absent responses present after a period of electrical stimulation. In our sample, 45% (n = 5 of the patients with intraoperative absence exhibited a positive response after an average of 4.9 months of continued electrical stimulation.

  2. Cochlear Implant Outcomes and Genetic Mutations in Children with Ear and Brain Anomalies

    OpenAIRE

    Micol Busi; Monica Rosignoli; Alessandro Castiglione; Federica Minazzi; Patrizia Trevisi; Claudia Aimoni; Ferdinando Calzolari; Enrico Granieri; Alessandro Martini

    2015-01-01

    Background. Specific clinical conditions could compromise cochlear implantation outcomes and drastically reduce the chance of an acceptable development of perceptual and linguistic capabilities. These conditions should certainly include the presence of inner ear malformations or brain abnormalities. The aims of this work were to study the diagnostic value of high resolution computed tomography (HRCT) and magnetic resonance imaging (MRI) in children with sensorineural hearing loss who were can...

  3. Imaging Evaluation of Pediatric Sensorineural Hearing Loss in Potential Candidates for Cochlear Implantation

    OpenAIRE

    Jallu, Aleena Shafi; Jehangir, Majid; Ul Hamid, Waqar; Pampori, Rafiq Ahmad

    2015-01-01

    Computerized tomography (CT) and magnetic resonance (MR) are complementary in the imaging of the labyrinth, the internal auditory canal and the brain in children with sensorineural hearing loss who are being evaluated for cochlear implantation. An accurate anatomical description of the inner ear is essential in the preoperative work up. Computerized tomography visualizes the bony structures, whereas MR can discern soft-tissue components including intra labyrinthine fluid, cerebrospinal fluid ...

  4. Longitudinal Analysis of the Absence of Intraoperative Neural Response Telemetry in Children using Cochlear Implants.

    Science.gov (United States)

    Moura, Amanda Christina Gomes de; Goffi-Gomez, Maria Valéria Schmidt; Couto, Maria Ines Vieira; Brito, Rubens; Tsuji, Robinson Koji; Befi-Lopes, Debora Maria; Matas, Carla Gentile; Bento, Ricardo Ferreira

    2014-10-01

    Introduction Currently the cochlear implant allows access to sounds in individuals with profound hearing loss. The objective methods used to verify the integrity of the cochlear device and the electrophysiologic response of users have noted these improvements. Objective To establish whether the evoked compound action potential of the auditory nerve can appear after electrical stimulation when it is absent intraoperatively. Methods The clinical records of children implanted with the Nucleus Freedom (Cochlear Ltd., Australia) (CI24RE) cochlear implant between January 2009 and January 2010 with at least 6 months of use were evaluated. The neural response telemetry (NRT) thresholds of electrodes 1, 6, 11, 16, and 22 during surgery and after at least 3 months of implant use were analyzed and correlated with etiology, length of auditory deprivation, and chronological age. These data were compared between a group of children exhibiting responses in all of the tested electrodes and a group of children who had at least one absent response. Results The sample was composed of clinical records of 51 children. From these, 21% (11) showed no NRT in at least one of the tested electrodes. After an average of 4.9 months of stimulation, the number of individuals exhibiting absent responses decreased from 21 to 11% (n = 6). Conclusion It is feasible that absent responses present after a period of electrical stimulation. In our sample, 45% (n = 5) of the patients with intraoperative absence exhibited a positive response after an average of 4.9 months of continued electrical stimulation.

  5. Bilateral Versus Unilateral Cochlear Implants in Children: A Study of Spoken Language Outcomes

    OpenAIRE

    2014-01-01

    Objectives: Although it has been established that bilateral cochlear implants (CIs) offer additional speech perception and localization benefits to many children with severe to profound hearing loss, whether these improved perceptual abilities facilitate significantly better language development has not yet been clearly established. The aims of this study were to compare language abilities of children having unilateral and bilateral CIs to quantify the rate of any improvement in language attr...

  6. Auditory Cortical Maturation in a Child with Cochlear Implant: Analysis of Electrophysiological and Behavioral Measures

    Science.gov (United States)

    Silva, Liliane Aparecida Fagundes; Couto, Maria Inês Vieira; Tsuji, Robinson Koji; Bento, Ricardo Ferreira; de Carvalho, Ana Claudia Martinho; Matas, Carla Gentile

    2015-01-01

    The purpose of this study was to longitudinally assess the behavioral and electrophysiological hearing changes of a girl inserted in a CI program, who had bilateral profound sensorineural hearing loss and underwent surgery of cochlear implantation with electrode activation at 21 months of age. She was evaluated using the P1 component of Long Latency Auditory Evoked Potential (LLAEP); speech perception tests of the Glendonald Auditory Screening Procedure (GASP); Infant Toddler Meaningful Auditory Integration Scale (IT-MAIS); and Meaningful Use of Speech Scales (MUSS). The study was conducted prior to activation and after three, nine, and 18 months of cochlear implant activation. The results of the LLAEP were compared with data from a hearing child matched by gender and chronological age. The results of the LLAEP of the child with cochlear implant showed gradual decrease in latency of the P1 component after auditory stimulation (172 ms–134 ms). In the GASP, IT-MAIS, and MUSS, gradual development of listening skills and oral language was observed. The values of the LLAEP of the hearing child were expected for chronological age (132 ms–128 ms). The use of different clinical instruments allow a better understanding of the auditory habilitation and rehabilitation process via CI. PMID:26881163

  7. Hydrogel limits stem cell dispersal in the deaf cochlea: implications for cochlear implants

    Science.gov (United States)

    Nayagam, Bryony A.; Backhouse, Steven S.; Cimenkaya, Cengiz; Shepherd, Robert K.

    2012-12-01

    Auditory neurons provide the critical link between a cochlear implant and the brain in deaf individuals, therefore their preservation and/or regeneration is important for optimal performance of this neural prosthesis. In cases where auditory neurons are significantly depleted, stem cells (SCs) may be used to replace the lost population of neurons, thereby re-establishing the critical link between the periphery (implant) and the brain. For such a therapy to be therapeutically viable, SCs must be differentiated into neurons, retained at their delivery site and damage caused to the residual auditory neurons minimized. Here we describe the transplantation of SC-derived neurons into the deaf cochlea, using a peptide hydrogel to limit their dispersal. The described approach illustrates that SCs can be delivered to and are retained within the basal turn of the cochlea, without a significant loss of endogenous auditory neurons. In addition, the tissue response elicited from this surgical approach was restricted to the surgical site and did not extend beyond the cochlear basal turn. Overall, this approach illustrates the feasibility of targeted cell delivery into the mammalian cochlea using hydrogel, which may be useful for future cell-based transplantation strategies, for combined treatment with a cochlear implant to restore function.

  8. Evaluation of surgical complications after cochlear implantation in Fars center, south of Iran

    Directory of Open Access Journals (Sweden)

    2008-06-01

    Full Text Available Introduction: Cochlear implant, which used in patients with profound hearing loss, may followed by some major or minor complications. These complications depend on age of patient, kind of device, kind of incision, surgical technique and surgeon’s skill. Major complications mostly need surgical intervention for treatment and, may persist for long time. Minor complications need medical treatment and don’t need surgical intervention. Materials and Methods: In this descriptive study between 2004-2007, 100 patients subjected to cochlear implantation were evaluated for post operative complications. Results: Overall complication rate was 14%. We had 4 major complications, including 2 device failure, one misplaced electrode and one cases with major hematoma .These complications managed successfully by surgical intervention or reimplantation. Facial nerve damage or wound breakdown were not seen in these patients. Minor complications including small hematoma, edema, wound infection, dizziness were seen in 10 cases that managed medically. Conclusion: In the recent years complications of cochlear implantation are reduced with increasing surgeon’s skill, new surgical methods and development in device technology.  

  9. Amplitude modulation detection with cochlear implants: Effects of electrode separation and stimulus level

    Science.gov (United States)

    Sarampalis, Anastasios; Chatterjee, Monita

    2001-05-01

    Amplitude modulation (AM) detection performance has been studied in the past with normal-hearing and hearing-impaired populations. The temporal modulation transfer function (TMTF) is a plot of AM detection performance as a function of modulation rate and provides a way of characterizing temporal sensitivity. Typically the TMTF takes the form of a low-pass filter, with performance declining above 50-70-Hz modulation rate. TMTFs have also been measured with cochlear implant patients, showing a similar low-pass characteristic, with a cutoff around 140-Hz rate, while sensitivity to AM was found to increase with increasing current level. The present study investigated the effects of stimulation level and electrode separation on TMTFs with cochlear implant patients. TMTFs were measured for narrow through wide electrode separations and three different (loudness-balanced) percentages of the dynamic range. Preliminary results indicate that sensitivity increases (lower thresholds) with increasing stimulation level, for a given electrode separation. However, comparing TMTFs across different electrode separations, sensitivity is independent of current level, but increases as a function of percentage of dynamic range. In summary, it appears that AM detection performance with cochlear implants depends primarily on sensation level, rather than current level or electrode separation. [Work supported by NIDCD Grant No. R01DC04786.

  10. Compensation for channel interaction in a simultaneous cochlear implant coding strategy.

    Science.gov (United States)

    Bader, Paul; Kals, Mathias; Schatzer, Reinhold; Griessner, Andreas; Zierhofer, Clemens

    2013-06-01

    This study evaluated a concept to reduce detrimental effects of spatial channel interaction in case of simultaneous stimulation with cochlear implants. The hypothesis was that effects of simultaneous channel interaction can be compensated by an algorithm such that no difference in hearing performance between simultaneous pulsatile stimulation and a strictly sequential reference strategy can be found. The simultaneous strategies used in this study stimulated two or three electrodes simultaneously in a monopolar configuration and used a specific compensation algorithm to reduce detrimental effects of simultaneous channel interaction. Overall stimulation rate was kept constant throughout conditions. Three of the configurations applied extended pulse phase durations. The German Oldenburg sentence and a German vowel test were used to measure speech recognition in 12 cochlear implant users. The results support the initial hypothesis. No significant differences in performance were found. A small spatial distance between simultaneous electrodes yielded slightly better results than a large distance. Extending the pulse phase durations had no significant effect on hearing performance. However, it significantly reduced stimulation amplitudes. Thus strategies implementing channel interaction compensated simultaneous stimulation with extended pulse phase durations might be a viable option for reducing power consumption and increasing battery life in cochlear implants.

  11. Auditory Cortical Maturation in a Child with Cochlear Implant: Analysis of Electrophysiological and Behavioral Measures

    Directory of Open Access Journals (Sweden)

    Liliane Aparecida Fagundes Silva

    2015-01-01

    Full Text Available The purpose of this study was to longitudinally assess the behavioral and electrophysiological hearing changes of a girl inserted in a CI program, who had bilateral profound sensorineural hearing loss and underwent surgery of cochlear implantation with electrode activation at 21 months of age. She was evaluated using the P1 component of Long Latency Auditory Evoked Potential (LLAEP; speech perception tests of the Glendonald Auditory Screening Procedure (GASP; Infant Toddler Meaningful Auditory Integration Scale (IT-MAIS; and Meaningful Use of Speech Scales (MUSS. The study was conducted prior to activation and after three, nine, and 18 months of cochlear implant activation. The results of the LLAEP were compared with data from a hearing child matched by gender and chronological age. The results of the LLAEP of the child with cochlear implant showed gradual decrease in latency of the P1 component after auditory stimulation (172 ms–134 ms. In the GASP, IT-MAIS, and MUSS, gradual development of listening skills and oral language was observed. The values of the LLAEP of the hearing child were expected for chronological age (132 ms–128 ms. The use of different clinical instruments allow a better understanding of the auditory habilitation and rehabilitation process via CI.

  12. The child after cochlear implant: Implications for rehabilitation in language development

    Directory of Open Access Journals (Sweden)

    Abiot Yenealem Derbie

    2014-07-01

    Full Text Available A cochlear implant (CI is a technology assisted device that can be putted in the inner ear through a surgical procedure to help to provide a sense of sound for profoundly deaf or severely hard-of-hearing persons (NIDCD, 2013 and Peng et al., 2007. The present review was to uncover different (verbal and non-verbal, psychosocial, timing of implantation, and parental dilemma challenges beyond the surgical procedures. Existing literatures in this area have been thoroughly reviewed based on eight themes. Themes were selected based on children’s developmental needs. Concluding remarks, then, forwarded which constructed from the review.

  13. An Investigation of Spatial Hearing in Children with Normal Hearing and with Cochlear Implants and the Impact of Executive Function

    Science.gov (United States)

    Misurelli, Sara M.

    The ability to analyze an "auditory scene"---that is, to selectively attend to a target source while simultaneously segregating and ignoring distracting information---is one of the most important and complex skills utilized by normal hearing (NH) adults. The NH adult auditory system and brain work rather well to segregate auditory sources in adverse environments. However, for some children and individuals with hearing loss, selectively attending to one source in noisy environments can be extremely challenging. In a normal auditory system, information arriving at each ear is integrated, and thus these binaural cues aid in speech understanding in noise. A growing number of individuals who are deaf now receive cochlear implants (CIs), which supply hearing through electrical stimulation to the auditory nerve. In particular, bilateral cochlear implants (BICIs) are now becoming more prevalent, especially in children. However, because CI sound processing lacks both fine structure cues and coordination between stimulation at the two ears, binaural cues may either be absent or inconsistent. For children with NH and with BiCIs, this difficulty in segregating sources is of particular concern because their learning and development commonly occurs within the context of complex auditory environments. This dissertation intends to explore and understand the ability of children with NH and with BiCIs to function in everyday noisy environments. The goals of this work are to (1) Investigate source segregation abilities in children with NH and with BiCIs; (2) Examine the effect of target-interferer similarity and the benefits of source segregation for children with NH and with BiCIs; (3) Investigate measures of executive function that may predict performance in complex and realistic auditory tasks of source segregation for listeners with NH; and (4) Examine source segregation abilities in NH listeners, from school-age to adults.

  14. Biomedical engineering principles of modern cochlear implants and recent surgical innovations.

    Science.gov (United States)

    Eshraghi, Adrien A; Gupta, Chhavi; Ozdamar, Ozcan; Balkany, Thomas J; Truy, Eric; Nazarian, Ronen

    2012-11-01

    This review covers the most recent clinical and surgical advances made in the development and application of cochlear implants (CIs). In recent years, dramatic progress has been made in both clinical and basic science aspect of cochlear implantation. Today's modern CI uses multi-channel electrodes with highly miniaturized powerful digital processing chips. This review article describes the function of various components of the modern multi-channel CIs. A selection of the most recent clinical and surgical innovations is presented. This includes the preliminary results with electro-acoustic stimulation or hybrid devices and ongoing basic science research that is focused on the preservation of residual hearing post-implantation. The result of an original device that uses a binaural stimulation mode with a single implanted receiver/stimulator is also presented. The benefit and surgical design of a temporalis pocket technique for the implant's receiver stimulator is discussed. Advances in biomedical engineering and surgical innovations that lead to an increasingly favorable clinical outcome and to an expansion of the indication of CI surgery are presented and discussed.

  15. Cochlear implantation in chronic otitis media and previous middle ear surgery: 20 years of experience.

    Science.gov (United States)

    Vincenti, V; Pasanisi, E; Bacciu, A; Bacciu, S; Zini, C

    2014-08-01

    Cochlear implantation in the setting of chronic otitis media or previous middle ear surgery poses several problems for the surgeon: possible spread of infection to the cochlea and the subarachnoid spaces with consequent meningitis, risk of electrode array extrusion and possible recurrence of the original disease. Several surgical strategies have been proposed to overcome these problems. In the present study, clinical and functional results of cochlear implantation in 26 patients with chronic otitis media (8 cases) or previous middle ear surgery (18 cases) in the ear most suitable for implantation were retrospectively reviewed. Among the 8 patients with chronic otitis media, in 7 cases a subtotal petrosectomy associated with external auditory canal closure and mastoid and Eustachian tube obliteration was performed, while in the remaining patient cochlear implantation was done 6 months after a myringoplasty. The only complication observed was a reperforation of the tympanic membrane in this latter patient. Among the 18 patients with previous middle ear surgery, 2 had undergone intact canal wall tympanomastoidectomy and were implanted utilising the previous surgical approach. In the remaining 16 patients who had a radical cavity, an open technique was maintained in 3 cases; a cavity revision associated to external auditory canal closure, Eustachian tube and mastoid obliteration was performed in 12 patients, while in one case a middle cranial fossa approach was utilised. Two of the 3 patients in whom an open technique was maintained have experienced electrode array extrusion. The only complication observed in the remaining patients was the breakdown of the external auditory canal closure in one case. No problems were noted in patients who had undergone intact canal wall tympanomastoidectomy as well as in the subject implanted via the middle cranial fossa approach. All patients achieved and maintained good hearing performance over time. Subtotal petrosectomy associated

  16. Auditory, Visual, and Auditory-Visual Perception of Emotions by Individuals with Cochlear Implants, Hearing Aids, and Normal Hearing

    Science.gov (United States)

    Most, Tova; Aviner, Chen

    2009-01-01

    This study evaluated the benefits of cochlear implant (CI) with regard to emotion perception of participants differing in their age of implantation, in comparison to hearing aid users and adolescents with normal hearing (NH). Emotion perception was examined by having the participants identify happiness, anger, surprise, sadness, fear, and disgust.…

  17. Auditory, Visual, and Auditory-Visual Speech Perception by Individuals with Cochlear Implants versus Individuals with Hearing Aids

    Science.gov (United States)

    Most, Tova; Rothem, Hilla; Luntz, Michal

    2009-01-01

    The researchers evaluated the contribution of cochlear implants (CIs) to speech perception by a sample of prelingually deaf individuals implanted after age 8 years. This group was compared with a group with profound hearing impairment (HA-P), and with a group with severe hearing impairment (HA-S), both of which used hearing aids. Words and…

  18. Are Young Children with Cochlear Implants Sensitive to the Statistics of Words in the Ambient Spoken Language?

    Science.gov (United States)

    Guo, Ling-Yu; McGregor, Karla K.; Spencer, Linda J.

    2015-01-01

    Purpose: The purpose of this study was to determine whether children with cochlear implants (CIs) are sensitive to statistical characteristics of words in the ambient spoken language, whether that sensitivity changes in expected ways as their spoken lexicon grows, and whether that sensitivity varies with unilateral or bilateral implantation.…

  19. Speech, vocabulary, and the education of children using cochlear implants: oral or total communication?

    Science.gov (United States)

    Connor, C M; Hieber, S; Arts, H A; Zwolan, T A

    2000-10-01

    This study examines the relationship between the teaching method, oral or total communication, used at children's schools and children's consonant-production accuracy and vocabulary development over time. Children who participated in the study (N = 147) demonstrated profound sensorineural hearing loss and had used cochlear implants for between 6 months and 10 years. Educational programs that used an oral communication (OC) approach focused on the development of spoken language, whereas educational programs that used a total communication (TC) approach focused on the development of language using both signed and spoken language. Using Hierarchical Linear Modeling (HLM) we compared the consonant-production accuracy, receptive spoken vocabulary, and expressive spoken and/or signed vocabulary skills, over time, of children who were enrolled in schools that used either OC or TC approaches, while controlling for a number of variables. These variables included age at implantation, preoperative aided speech detection thresholds, type of cochlear implant device used, and whether a complete or incomplete active electrode array was implanted. The results of this study indicated that as they used their implants the children demonstrated improved consonant-production accuracy and expressive and receptive vocabulary over time, regardless of whether their school employed a TC or OC teaching method. Furthermore, there appeared to be a complex relationship among children's performance with the cochlear implant, age at implantation, and communication/teaching strategy employed by the school. Controlling for all variables, children in OC programs demonstrated, on average, superior consonant-production accuracy, with significantly greater rates of improvement in consonant-production accuracy scores over time compared to children in TC programs. However, there was no significant difference between OC and TC groups in performance or rate of growth in consonant-production accuracy when

  20. Cochlear-Meningitis Vaccination

    Science.gov (United States)

    ... AcademyU Home Study Course Maintenance of Certification Conferences & Events ... you should know Children with cochlear implants are more likely to get bacterial meningitis than children without cochlear implants. In addition, ...

  1. Digital imaging: a valuable technique for the postoperative assessment of cochlear implantation

    Energy Technology Data Exchange (ETDEWEB)

    Lawson, J.T. [Department of Radiology, Belfast City Hospital Trust, Belfast (United Kingdom); Cranley, K. [Northern Ireland Regional Medical Physics Agency, Forster Green Hospital, Belfast (United Kingdom); Toner, J.G. [Regional Cochlear Implant Centre, Belfast City Hospital Trust, Belfast (United Kingdom)

    1998-07-01

    Cochlear implantation with a multi-channel electrode array which provides stimulation via the auditory nerve has become a standard treatment for profound deafness. Postoperative radiography demonstrates electrode position and enables confirmation of satisfactory intra-cochlear electrode placement. The number of active electrodes which have been inserted can be determined and possible complications such as electrode kinking or slippage can be assessed. We evaluated digital radiography with confirmation of electrode position by intermittent fluoroscopy and assessed the relative radiation dose of the digital technique, conventional radiography and CT scanning. Radiation dose for this method usually ranges between 40 {mu}Gy and 440 {mu}Gy compared with a single exposure on the skull stand which produces a dose to the region of the cochlea of 470 {mu}Gy and a CT exposure of 950 {mu}Gy. The digital technique is comfortable for the patient, easily reproducible and provides images of high diagnostic quality enabling each electrode to be identified, which is especially valuable in association with postoperative electrode mapping. It also involves a lower radiation dose than conventional radiography. We now use digital radiography for all postoperative cochlear implant assessment. (orig.) With 4 figs., 13 refs.

  2. [Suprasegmental speech in prelingual hearing-impaired children with cochlear implants, hearing-impaired children without implants and normal hearing children].

    Science.gov (United States)

    Ligthelm, A; Groenewald, E

    1999-01-01

    A review of the relevant literature indicates a lack of knowledge regarding suprasegmental speech characteristics in prelingual hearing impaired children with cochlear implants. This study is aimed at examining certain suprasegmental features in the speech of prelingual hearing impaired children with cochlear implants by perceptual ratings and acoustic analyses, comparing these results to that of prelingual hearing impaired children without implants, and normal hearing children of the same age. Twelve Afrikaansspeaking children between the ages of six and ten years were included in three groups. An integrated view of the perceptual and acoustic results shows that the cochlear implanted children's suprasegmental speech characteristics bear closer resemblance to those of the normal hearing group than those of the hearing impaired group.

  3. Vocabulary Knowledge of Children With Cochlear Implants: A Meta-Analysis.

    Science.gov (United States)

    Lund, Emily

    2016-04-01

    This article employs meta-analysis procedures to evaluate whether children with cochlear implants demonstrate lower spoken-language vocabulary knowledge than peers with normal hearing. Of the 754 articles screened and 52 articles coded, 12 articles met predetermined inclusion criteria (with an additional 5 included for one analysis). Effect sizes were calculated for relevant studies and forest plots were used to compare differences between groups of children with normal hearing and children with cochlear implants. Weighted effect size averages for expressive vocabulary measures (g = -11.99; p vocabulary measures (g = -20.33; p vocabulary knowledge than children with normal hearing. Additional analyses confirmed the value of comparing vocabulary knowledge of children with hearing loss to a tightly matched (e.g., socioeconomic status-matched) sample. Age of implantation, duration of implantation, and chronological age at testing were not significantly related to magnitude of weighted effect size. Findings from this analysis represent a first step toward resolving discrepancies in the vocabulary knowledge literature.

  4. The relationship of theory of mind and executive functions in normal, deaf and cochlear-implanted children

    Directory of Open Access Journals (Sweden)

    Farideh Nazarzadeh

    2014-08-01

    Full Text Available Background and Aim : Theory of mind refers to the ability to understand the others have mental states that can be different from one's own mental states or facts. This study aimed to investigate the relationship of theory of mind and executive functions in normal hearing, deaf, and cochlear-implanted children.Methods: The study population consisted of normal, deaf and cochlear-implanted girl students in Mashhad city, Iran. Using random sampling, 30 children (10 normal, 10 deaf and 10 cochlear-implanted in age groups of 8-12 years old were selected. To measure the theoty of mind, theory of mind 38-item scale and to assess executive function, Coolidge neuropsychological and personality test was used. Research data were analyzed using the Spearman correlation coefficient, analysis of variance and Kruskal-Wallis tests.Results: There was a significant difference between the groups in the theory of mind and executive function subscales, organization, planning-decision-making, and inhibition. Between normal and deaf groups (p=0.01, as well as cochlear-implanted and deaf groups (p=0.01, there was significant difference in planning decision-making subscale. There was not any significant relationship between the theory of mind and executive functions generally or the theory of mind and executive function subscales in these three groups independently.Conclusion: Based on our findings, cochlear-implanted and deaf children have lower performance in theory of mind and executive function compared with normal hearing children.

  5. Experience with cochlear implants in Greenlanders with profound hearing loss living in Greenland

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    Preben Homøe

    2013-08-01

    Full Text Available Objective. Cochlear implant (CI treatment was introduced to the world in the 1980s and has become a routine treatment for congenital or acquired severe-to-profound hearing loss. CI treatment requires access to a highly skilled team of ear, nose and throat specialists, audiologists and speech-language pathologists for evaluation, surgery and rehabilitation. In particular, children treated with CI are in need of long-term post-operative auditory training and other follow-up support. Design. The study is retrospective with updated information on present performance. Results. Since 2001, a total of 11 Greenlandic patients living in Greenland have been treated with CI, 7 children and 4 adults. Of these children, 4 use oral communication only and are full-time CI-users, 2 with full-time use of CI are still in progress with use of oral communication, and 1 has not acquired oral language yet, but has started auditory and speech training. Six children attend mainstream public school while one child is in kindergarten. Of the adults, only 1 has achieved good speech perception with full-time use of CI while 3 do not use the CI. Discussion. From an epidemiological point of view, approximately 1–3 children below 6 years are in need of a CI every second year in Greenland often due to sequelae from meningitis, which may cause postinfectious deafness. Screening of new-borns for hearing has been started in Greenland establishing the basis for early diagnosis of congenital hearing impairment and subsequent intervention. The logistics and lack of availability of speech therapists in Greenland hampers possibilities for optimal language and speech therapy of CI patients in Greenland. This study aims at describing the results of CI treatment in Greenlanders and the outcome of the CI operations along with the auditory and speech/language outcomes. Finally, we present a suggestion for the future CI treatment and recommendations for an increased effort in the

  6. Delayed low frequency hearing loss caused by cochlear implantation interventions via the round window but not cochleostomy.

    Science.gov (United States)

    Rowe, David; Chambers, Scott; Hampson, Amy; Eastwood, Hayden; Campbell, Luke; O'Leary, Stephen

    2016-03-01

    Cochlear implant recipients show improved speech perception and music appreciation when residual acoustic hearing is combined with the cochlear implant. However, up to one third of patients lose their pre-operative residual hearing weeks to months after implantation, for reasons that are not well understood. This study tested whether this "delayed" hearing loss was influenced by the route of electrode array insertion and/or position of the electrode array within scala tympani in a guinea pig model of cochlear implantation. Five treatment groups were monitored over 12 weeks: (1) round window implant; (2) round window incised with no implant; (3) cochleostomy with medially-oriented implant; (4) cochleostomy with laterally-oriented implant; and (5) cochleostomy with no implant. Hearing was measured at selected time points by the auditory brainstem response. Cochlear condition was assessed histologically, with cochleae three-dimensionally reconstructed to plot electrode paths and estimate tissue response. Electrode array trajectories matched their intended paths. Arrays inserted via the round window were situated nearer to the basilar membrane and organ of Corti over the majority of their intrascalar path compared with arrays inserted via cochleostomy. Round window interventions exhibited delayed, low frequency hearing loss that was not seen after cochleostomy. This hearing loss appeared unrelated to the extent of tissue reaction or injury within scala tympani, although round window insertion was histologically the most traumatic mode of implantation. We speculate that delayed hearing loss was related not to the electrode position as postulated, but rather to the muscle graft used to seal the round window post-intervention, by altering cochlear mechanics via round window fibrosis.

  7. Semantic and syntactic reading comprehension strategies used by deaf children with early and late cochlear implantation.

    Science.gov (United States)

    Gallego, Carlos; Martín-Aragoneses, M Teresa; López-Higes, Ramón; Pisón, Guzmán

    2016-01-01

    Deaf students have traditionally exhibited reading comprehension difficulties. In recent years, these comprehension problems have been partially offset through cochlear implantation (CI), and the subsequent improvement in spoken language skills. However, the use of cochlear implants has not managed to fully bridge the gap in language and reading between normally hearing (NH) and deaf children, as its efficacy depends on variables such as the age at implant. This study compared the reading comprehension of sentences in 19 children who received a cochlear implant before 24 months of age (early-CI) and 19 who received it after 24 months (late-CI) with a control group of 19 NH children. The task involved completing sentences in which the last word had been omitted. To complete each sentence children had to choose a word from among several alternatives that included one syntactic and two semantic foils in addition to the target word. The results showed that deaf children with late-CI performed this task significantly worse than NH children, while those with early-CI exhibited no significant differences with NH children, except under more demanding processing conditions (long sentences with infrequent target words). Further, the error analysis revealed a preference of deaf students with early-CI for selecting the syntactic foil over a semantic one, which suggests that they draw upon syntactic cues during sentence processing in the same way as NH children do. In contrast, deaf children with late-CI do not appear to use a syntactic strategy, but neither a semantic strategy based on the use of key words, as the literature suggests. Rather, the numerous errors of both kinds that the late-CI group made seem to indicate an inconsistent and erratic response when faced with a lack of comprehension. These findings are discussed in relation to differences in receptive vocabulary and short-term memory and their implications for sentence reading comprehension.

  8. Temporal bone characterization and cochlear implant feasibility in the common marmoset (Callithrix jacchus).

    Science.gov (United States)

    Johnson, Luke A; Della Santina, Charles C; Wang, Xiaoqin

    2012-08-01

    The marmoset (Callithrix jacchus) is a valuable non-human primate model for studying behavioral and neural mechanisms related to vocal communication. It is also well suited for investigating neural mechanisms related to cochlear implants. The purpose of this study was to characterize marmoset temporal bone anatomy and investigate the feasibility of implanting a multi-channel intracochlear electrode into the marmoset scala tympani. Micro computed tomography (microCT) was used to create high-resolution images of marmoset temporal bones. Cochlear fluid spaces, middle ear ossicles, semicircular canals and the surrounding temporal bone were reconstructed in three-dimensional space. Our results show that the marmoset cochlea is ∼16.5 mm in length and has ∼2.8 turns. The cross-sectional area of the scala tympani is greatest (∼0.8 mm(2)) at ∼1.75 mm from the base of the scala, reduces to ∼0.4 mm(2) at 5 mm from the base, and decreases at a constant rate for the remaining length. Interestingly, this length-area profile, when scaled 2.5 times, is similar to the scala tympani of the human cochlea. Given these dimensions, a compatible multi-channel implant electrode was identified. In a cadaveric specimen, this electrode was inserted ¾ turn into the scala tympani through a cochleostomy at ∼1 mm apical to the round window. The depth of the most apical electrode band was ∼8 mm. Our study provides detailed structural anatomy data for the middle and inner ear of the marmoset, and suggests the potential of the marmoset as a new non-human primate model for cochlear implant research.

  9. EARLY DIAGNOSIS AS A PRECONDITION FOR A SUCCESSFUL COCHLEAR IMPLANTATION

    Directory of Open Access Journals (Sweden)

    Zora JACHOVA

    2007-12-01

    Full Text Available All researches point to the fact that the early de­tection and diagnosis are still performed late (after the third year of life, so in the first three years of life there is no establishment of the developmental changes in a way that they include the interrelation aspects of the human development and its natural sequences. With the start of early rehabilitation procedures we encourage the positive manner of communication in the small deaf child, so that it manufactures and processes information that can lead to positive quality changes in the develop­mental process.The hearing technology has dramatically changed over the last decades. With the contribution of audiometers in the 40-ties of the last century we started to learn how to precisely estimate the de­gree and type of the hearing impairment, which has an enormous meaning for the optimal fitting of the powerful hearing aids and the cochlear im­plants. In the same period hearing aids for small children are developed which enabled children with a sig­nificant hearing loss a better opportunity to de­velop speech and their spoken language.

  10. Brain responses to musical feature changes in adolescent cochlear implant users.

    Science.gov (United States)

    Petersen, Bjørn; Weed, Ethan; Sandmann, Pascale; Brattico, Elvira; Hansen, Mads; Sørensen, Stine Derdau; Vuust, Peter

    2015-01-01

    Cochlear implants (CIs) are primarily designed to assist deaf individuals in perception of speech, although possibilities for music fruition have also been documented. Previous studies have indicated the existence of neural correlates of residual music skills in postlingually deaf adults and children. However, little is known about the behavioral and neural correlates of music perception in the new generation of prelingually deaf adolescents who grew up with CIs. With electroencephalography (EEG), we recorded the mismatch negativity (MMN) of the auditory event-related potential to changes in musical features in adolescent CI users and in normal-hearing (NH) age mates. EEG recordings and behavioral testing were carried out before (T1) and after (T2) a 2-week music training program for the CI users and in two sessions equally separated in time for NH controls. We found significant MMNs in adolescent CI users for deviations in timbre, intensity, and rhythm, indicating residual neural prerequisites for musical feature processing. By contrast, only one of the two pitch deviants elicited an MMN in CI users. This pitch discrimination deficit was supported by behavioral measures, in which CI users scored significantly below the NH level. Overall, MMN amplitudes were significantly smaller in CI users than in NH controls, suggesting poorer music discrimination ability. Despite compliance from the CI participants, we found no effect of the music training, likely resulting from the brevity of the program. This is the first study showing significant brain responses to musical feature changes in prelingually deaf adolescent CI users and their associations with behavioral measures, implying neural predispositions for at least some aspects of music processing. Future studies should test any beneficial effects of a longer lasting music intervention in adolescent CI users.

  11. Brain Responses to Musical Feature Changes in Adolescent Cochlear Implant Users

    Directory of Open Access Journals (Sweden)

    Bjørn ePetersen

    2015-02-01

    Full Text Available Cochlear implants (CIs are primarily designed to assist deaf individuals in perception of speech, although possibilities for music fruition have also been documented. Previous studies have indicated the existence of neural correlates of residual music skills in postlingually deaf adults and children. However, little is known about the behavioral and neural correlates of music perception in the new generation of prelingually deaf adolescents who grew up with CIs. With electroencephalography (EEG, we recorded the mismatch negativity (MMN of the auditory event-related potential (ERP to changes in musical features in adolescent CI users and in normal-hearing age mates. EEG recordings and behavioral testing were carried out before (T1 and after (T2 a 2-week music training program for the CI users and in two sessions equally separated in time for normal-hearing (NH controls. We found significant MMNs in adolescent CI users for deviations in timbre, intensity and rhythm, indicating residual neural prerequisites for musical feature processing. By contrast, only one of the two pitch deviants elicited an MMN in CI users. This pitch discrimination deficit was supported by behavioral measures, in which CI users scored significantly below the NH level. Overall MMN amplitudes were significantly smaller in CI users than in NH controls, suggesting poorer music discrimination ability. Despite compliance from the CI-participants, we found no effect of the music training, likely resulting from the brevity of the program. This is the first study showing significant brain responses to musical feature changes in prelingually deaf adolescent CI users and their associations with behavioral measures, implying neural predispositions for at least some aspects of music processing. Future studies should test any beneficial effects of a longer lasting music intervention in adolescent CI users.

  12. Development of Sound Localization Strategies in Children with Bilateral Cochlear Implants.

    Directory of Open Access Journals (Sweden)

    Yi Zheng

    Full Text Available Localizing sounds in our environment is one of the fundamental perceptual abilities that enable humans to communicate, and to remain safe. Because the acoustic cues necessary for computing source locations consist of differences between the two ears in signal intensity and arrival time, sound localization is fairly poor when a single ear is available. In adults who become deaf and are fitted with cochlear implants (CIs sound localization is known to improve when bilateral CIs (BiCIs are used compared to when a single CI is used. The aim of the present study was to investigate the emergence of spatial hearing sensitivity in children who use BiCIs, with a particular focus on the development of behavioral localization patterns when stimuli are presented in free-field horizontal acoustic space. A new analysis was implemented to quantify patterns observed in children for mapping acoustic space to a spatially relevant perceptual representation. Children with normal hearing were found to distribute their responses in a manner that demonstrated high spatial sensitivity. In contrast, children with BiCIs tended to classify sound source locations to the left and right; with increased bilateral hearing experience, they developed a perceptual map of space that was better aligned with the acoustic space. The results indicate experience-dependent refinement of spatial hearing skills in children with CIs. Localization strategies appear to undergo transitions from sound source categorization strategies to more fine-grained location identification strategies. This may provide evidence for neural plasticity, with implications for training of spatial hearing ability in CI users.

  13. Congenital malformations of the ear and cochlear implantation in children: review and temporal bone report of common cavity.

    Science.gov (United States)

    Graham, J M; Phelps, P D; Michaels, L

    2000-01-01

    The objective of this review is to analyze aspects of congenital malformation of the ear in relation to cochlear implantation in children. Having briefly described the in utero development of the ear and the classification of types of external, middle and inner ear malformation, five practical aspects of these malformations are discussed. It seems likely that the combination of bilateral profound sensorineural deafness with bilateral microtia severe enough to make a surgical approach to the cochlea difficult will be extremely uncommon. No such cases have been reported, although Klippel-Feil deformity seems the syndrome most likely to produce this set of circumstances. Abnormalities in the intratympanic course of the facial nerve have been associated with cochlear malformation, emphasizing the benefit of intra-operative facial nerve monitoring, and a technique suggested for safely avoiding an abnormally placed nerve. Fistulae of cerebrospinal fluid (CSF) and perilymph can complicate surgery and are relatively common in common cavity and Mondini malformations. Strategies for facilitating surgery in the presence of 'gushers', for measuring the pressure of a gusher and for placement of the cochlear implant electrode array are reviewed, with reports of fluctuating levels of electric current when implants lie in dysplastic cochleas. The relationship of implant performance to VIIIth nerve tissue in malformed cochleas is discussed, with a description of the histological findings in a common cavity cochlea. Techniques for identifying the absence of the cochlear nerve are reviewed. Stimulation of the facial nerve by cochlear implants has been described in cases of congenital malformation of the labyrinth but is relatively uncommon. Case reports of the benefit received by implanted children with congenital cochlear malformation have appeared since 1988. Most cases reported have not yet been followed for long enough to establish a clear picture of the outcome following

  14. Quality of Life for Children with Cochlear Implants: Perceived Benefits and Problems and the Perception of Single Words and Emotional Sounds

    Science.gov (United States)

    Schorr, Efrat A.; Roth, Froma P.; Fox, Nathan A.

    2009-01-01

    Purpose: This study examined children's self-reported quality of life with a cochlear implant as related to children's actual perceptions of speech and the emotional information conveyed by sound. Effects of age at amplification with hearing aids and fitting of cochlear implants on perceived quality of life were also investigated. Method: A…

  15. Cochlear implants in children: surgical site infections and prevention and treatment of acute otitis media and meningitis.

    Science.gov (United States)

    Rubin, Lorry G; Papsin, Blake

    2010-08-01

    The use of cochlear implants is increasingly common, particularly in children younger than 3 years. Bacterial meningitis, often with associated acute otitis media, is more common in children with cochlear implants than in groups of control children. Children with profound deafness who are candidates for cochlear implants should receive all age-appropriate doses of pneumococcal conjugate and Haemophilus influenzae type b conjugate vaccines and appropriate annual immunization against influenza. In addition, starting at 24 months of age, a single dose of 23-valent pneumococcal polysaccharide vaccine should be administered. Before implant surgery, primary care providers and cochlear implant teams should ensure that immunizations are up-to-date, preferably with completion of indicated vaccines at least 2 weeks before implant surgery. Imaging of the temporal bone/inner ear should be performed before cochlear implantation in all children with congenital deafness and all patients with profound hearing impairment and a history of bacterial meningitis to identify those with inner-ear malformations/cerebrospinal fluid fistulas or ossification of the cochlea. During the initial months after cochlear implantation, the risk of complications of acute otitis media may be higher than during subsequent time periods. Therefore, it is recommended that acute otitis media diagnosed during the first 2 months after implantation be initially treated with a parenteral antibiotic (eg, ceftriaxone or cefotaxime). Episodes occurring 2 months or longer after implantation can be treated with a trial of an oral antimicrobial agent (eg, amoxicillin or amoxicillin/clavulanate at a dose of approximately 90 mg/kg per day of amoxicillin component), provided the child does not appear toxic and the implant does not have a spacer/positioner, a wedge that rests in the cochlea next to the electrodes present in certain implant models available between 1999 and 2002. "Watchful waiting" without antimicrobial

  16. Musical Methods for Little Digital Ears — Musical Learning with Preschool Cochlear Implant Users

    DEFF Research Database (Denmark)

    Petersen, Bjørn; Hardgrove Hansen, Roberta; Beyer, Karen

    2010-01-01

    Prelingually deaf children who receive cochlear implants (CI) early can successfully develop age-appropriate language skills provided sufficient intervention measures are initiated. However, little is known about the music perception and enjoyment of these children, though the enhanced development...... was measured objectively at the beginning and end of the intervention period. For a musical performance reference, test data were collected from a group of normally hearing peers. Results: The children in the music group outperformed the controls in all tests. Their musical discrimination abilities improved...... in the central auditory system in early-implanted children may benefit music processing. We hypothesized that early-implanted, prelingually deaf children with CI’s, who were exposed to group-oriented music learning activities, would increase their music discrimination skills and — as a potential near transfer...

  17. Minimally Invasive Cochlear Implantation Assisted by Bi-planar Device: An Exploratory Feasibility Study in vitro

    Science.gov (United States)

    Ke, Jia; Zhang, Shao-Xing; Hu, Lei; Li, Chang-Sheng; Zhu, Yun-Feng; Sun, Shi-Long; Wang, Li-Feng; Ma, Fu-Rong

    2016-01-01

    Background: A single drilled tunnel from the lateral mastoid cortex to the cochlea via the facial recess is essential for minimally invasive cochlear implant surgery. This study aimed to explore the safety profile of this kind of new image-guided and bi-planar device-assisted surgery procedure in vitro. Methods: Image-guided minimally invasive cochlear implantations were performed on eight cadaveric temporal bone specimens. The main procedures were: (1) temporal bone specimens were prepared for surgery and fiducial markers were registered. (2) computed tomography (CT) scans were performed for future reference. (3) CT scan images were processed and drill path was planned to minimize cochlear damage. (4) bi-planar device-assisted drilling was performed on the specimens using the registration. (5) surgical safety was evaluated by calculating the deviation between the drill and the planned paths, and by measuring the closest distance between the drilled path and critical anatomic structures. Results: Eight cases were operated successfully to the basal turn of the cochlear with intact facial nerves (FNs). The deviations from target points and entrance points were 0.86 mm (0.68–1.00 mm) and 0.44 mm (0.30–0.96 mm), respectively. The angular error between the planned and the drilled trajectory was 1.74° (1.26–2.41°). The mean distance from the edge of the drilled path to the FN and to the external canal was 0.60 mm (0.35–0.83 mm) and 1.60 mm (1.30–2.05 mm), respectively. In five specimens, the chorda tympani nerves were well preserved. In all cases, no injury happened to auditory ossicles. Conclusions: This exploratory study demonstrated the safety of the newly developed image-guided minimally invasive cochlear implantation assisted by the bi-planar device and established the operational procedures. Further, more in vitro experiments are needed to improve the system operation and its safety. PMID:27748341

  18. Minimally Invasive Cochlear Implantation Assisted by Bi-planar Device: An Exploratory Feasibility Study in vitro

    Institute of Scientific and Technical Information of China (English)

    Jia Ke; Shao-Xing Zhang; Lei Hu; Chang-Sheng Li; Yun-Feng Zhu; Shi-Long Sun; Li-Feng Wang

    2016-01-01

    Background:A single drilled tunnel from the lateral mastoid cortex to the cochlea via the facial recess is essential for minimally invasive cochlear implant surgery.This study aimed to explore the safety profile of this kind of new image-guided and bi-planar device-assisted surgery procedure in vitro.Methods:Image-guided minimally invasive cochlear implantations were performed on eight cadaveric temporal bone specimens.The main procedures were:(1) temporal bone specimens were prepared for surgery and fiducial markers were registered.(2) computed tomography (CT) scans were performed for future reference.(3) CT scan images were processed and drill path was planned to minimize cochlear damage.(4) bi-planar device-assisted drilling was performed on the specimens using the registration.(5) surgical safety was evaluated by calculating the deviation between the drill and the planned paths,and by measuring the closest distance between the drilled path and critical anatomic structures.Results:Eight cases were operated successfully to the basal turn of the cochlear with intact facial nerves (FNs).The deviations from target points and entrance points were 0.86 mm (0.68-1.00 mm) and 0.44 mm (0.30-0.96 mm),respectively.The angular error between the planned and the drilled trajectory was 1.74° (1.26-2.41°).The mean distance from the edge of the drilled path to the FN and to the external canal was 0.60 mm (0.35-0.83 mm) and 1.60 mm (1.30-2.05 mm),respectively.In five specimens,the chorda tympani nerves were well preserved.In all cases,no injury happened to auditory ossicles.Conclusions:This exploratory study demonstrated the safety of the newly developed image-guided minimally invasive cochlear implantation assisted by the bi-planar device and established the operational procedures.Further,more in vitro experiments are needed to improve the system operation and its safety.

  19. Effects of Parents’ Level of Education and Economic Status on the Age at Cochlear Implantation in Children

    Directory of Open Access Journals (Sweden)

    Zahra Jeddi

    2012-01-01

    The mean times between the age of the children at diagnosis of hearing loss and amplification, beginning the rehabilitation program, and performing the cochlear implantation were 4.05 (±0.86, 2.59 (±0.9, and 25.43 (±1.45 months, respectively; delays that were statistically significant (P≤0.004. In 47.9 percent of cases, the parents were the first people to suspect the occurrence of hearing loss in their child. Statistical analysis indicated that the age at cochlear implantation decreases as the educational level of the parents increases (P≤0.003. There was also a significant difference between parents’ economic circumstances and the age of cochlear implantation (P

  20. A Psychophysics experimental software to evaluate electrical pitch discrimination in Nucleus cochlear implanted patients

    Science.gov (United States)

    Pérez Zaballos, M. T.; Ramos de Miguel, A.; Killian, M.; Ramos Macías, A.

    2016-02-01

    Multichannel electrode array design in cochlear implants has evolved into two major categories: straight and perimodiolar electrodes. When implanted, the former lies along the outer wall of the scala tympani, while the later are located closer to the modiolus, where the neural ends are. Therefore, a perimodiolar position of the electrode array could be expected to result in reduced stimulus thresholds and stimulating currents, increased dynamic range, and more localized stimulation of the neural elements. However, their advantage for pitch discrimination has not been conclusively stated. Therefore, in order to study electrode independence, a psychophysical software has been developed, making use of Nucleus Implant Communicator tools provided by Cochlear company under a research agreement. The application comprises a graphical interface to facilitate its use, since previous software has always required some type of computer language skills. It allows for customization of electrical pulse parameters, measurement of threshold and comfort levels, loudness balancing and alternative forced choice experiments to determine electrode discrimination in Nucleus© users.

  1. The Relation between Nonverbal IQ and Postoperative CI Outcomes in Cochlear Implant Users: Preliminary Result

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    Mina Park

    2015-01-01

    Full Text Available Objectives. This study assessed the correlation between performance intelligence and the postoperative cochlear implant (CI outcome in Korean-speaking children. In addition, the relationship between the performance intelligence subscales and the post-CI speech outcome was evaluated. Materials and Methods. Thirteen pediatric CI users (five males, eight females; median age at implantation 6.2 (range 1.3–14.2 years; median age at intelligence test 9.3 (range 5–16 years who were tested using the Korean Educational Development Institute-Wechsler Intelligence Scale for children were studied. The correlations between the intelligence scores and 1-2 years postoperative Categories of Auditory Performance (CAP scores and between subscales of performance and 1-2 years postoperative CAP scores were analyzed. Results. There was no correlation between the categories of verbal intelligence quotient (IQ and performance IQ for “mentally retarded” and “average,” respectively (Spearman’s rho = 0.42, P=0.15. There was a strong correlation between performance IQ and the postoperative CAP scale (Spearman’s rho = 0.8977, P=0.0008. “Picture arrangement” and “picture completion,” reflecting social cognition, were strongly correlated with the postoperative CAP scales. Conclusion. Performance intelligence, especially social cognition, was strongly related to the postoperative CI outcome of cochlear implant users. Therefore, auditory rehabilitation, including social rehabilitation, should maximize the postoperative CI outcomes.

  2. Experiences with bimodal hearing and bilateral cochlear implantation in the elderly

    Directory of Open Access Journals (Sweden)

    E.M. Schedlbauer

    2011-03-01

    Full Text Available With the geriatric population being the fastest growing segment of our society the number of elderly people with different levels of hearing impairments is increasing. According to the German Society of Hearing Impaired there are concerned 37% of the 60-69-year-old and 54% of the over 70-year-old. Furthermore the needs of the elderly are changing with augmented social activity and agility compared to former times: 80 is the new 70. After initial concerns about poor audiologic performance and added peri- and postoperative risks because of comorbidities, cochlear implantation is becoming more and more the method of choice also for postlingually deaf people of higher age. With the demographic shift there can be observed a trend reversal: the proportion of implantees is sliding from the young to the senior and duration of deafness at the time of implantation is declining (Battmer 2010. It is therefore necessary to investigate the impact of cochlear implantation on audiologic performance and quality of life in this growing age group.

  3. Principles of creation of complex physical rehabilitation program for children after cochlear implantation

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    Zastavna O.M.

    2016-02-01

    Full Text Available Purpose: to elucidate main principles of complex physical rehabilitation program for senior pre-school age children after cochlear implantation. Material: 40 hard hearing children of senior pre-school (main group were tested. Main group №1 consisted of hard hearing children (10 boys and 11 girls, who did not underwent cochlear implantation and learned by program of pre-school educational establishment for hard-hearing children. Main group №2 consisted of 19 children after cochlear implantation, registered at oral-aural specialists (10 boys and 9 girls. For them the author’s program of physical rehabilitation was worked out. Comparison group consisted of 40 children with normal hearing (18 boys and 22 girls. Effectiveness of the worked out program was assessed by parameters of physical and psycho-motor condition, by children’s physical qualities. Results: the offered program of children’s physical rehabilitation was developed on the base of assessment of physical and psycho-motor condition, physical fitness. The program is of complex character and includes the following elements: domestic habilitation, kinetisotherapy methodic (morning hygienic exercises, Yoga for children, health related training complex, fit-ball training, breathing and articulation exercises, massage (general, speech therapy massage, hardening. Conclusions: Complex character of the worked out program implies diverse influence on different disorders in children’s organisms. All these are realized against the background of main etiological factor of these changes (deafness removal. Such approach results in improvement of children’s condition, their quicker socialization and possibility to study in comprehensive school in due time.

  4. Instruments to assess the oral language of children fitted with a cochlear implant: a systematic review

    Directory of Open Access Journals (Sweden)

    Mariane Perin da Silva

    2011-12-01

    Full Text Available The oral language development depends on the effective development of the hearing system. In cases of children presenting with hearing loss, a cochlear implant is an electronic device indicated to (rehabilitate the hearing function. Thus, it is of paramount importance to assess and follow the oral language development of children fitted with a cochlear implant (CI to measure the effectiveness of the electronic device and support the therapeutic planning of these children. Questions are currently being raised about the instruments to assess the oral language of children using a CI, and, seeking the answers, this systematic review aimed at surveying these instruments. Searches were performed in three different databases utilizing six different descriptors to select articles published from 2004 to 2009 that performed an oral language assessment of children with a CI. Initially, 373 articles were found, and, after the application of inclusion criteria, 47 articles were analyzed, resulting in a survey of 74 instruments for oral language assessment, including tests, questionnaires and inventories. In analyzing the articles, it was realized that the studies included in this systematic review presented varied methodologies and low levels of evidence, with a greater concentration of instruments assessing receptive and expressive language, emphasizing the survey of the child's vocabulary and questionnaires. Thus, it can be verified that other linguistic skills, such as morphosyntactic, semantic, and narrative-pragmatic ones that are important in structuring speech and language for the effectiveness of the child's speech, are not being focused on. Just one of the instruments cited, a questionnaire, was specific for the oral language assessment of children with cochlear implants.

  5. Unanesthetized auditory cortex exhibits multiple codes for gaps in cochlear implant pulse trains.

    Science.gov (United States)

    Kirby, Alana E; Middlebrooks, John C

    2012-02-01

    Cochlear implant listeners receive auditory stimulation through amplitude-modulated electric pulse trains. Auditory nerve studies in animals demonstrate qualitatively different patterns of firing elicited by low versus high pulse rates, suggesting that stimulus pulse rate might influence the transmission of temporal information through the auditory pathway. We tested in awake guinea pigs the temporal acuity of auditory cortical neurons for gaps in cochlear implant pulse trains. Consistent with results using anesthetized conditions, temporal acuity improved with increasing pulse rates. Unlike the anesthetized condition, however, cortical neurons responded in the awake state to multiple distinct features of the gap-containing pulse trains, with the dominant features varying with stimulus pulse rate. Responses to the onset of the trailing pulse train (Trail-ON) provided the most sensitive gap detection at 1,017 and 4,069 pulse-per-second (pps) rates, particularly for short (25 ms) leading pulse trains. In contrast, under conditions of 254 pps rate and long (200 ms) leading pulse trains, a sizeable fraction of units demonstrated greater temporal acuity in the form of robust responses to the offsets of the leading pulse train (Lead-OFF). Finally, TONIC responses exhibited decrements in firing rate during gaps, but were rarely the most sensitive feature. Unlike results from anesthetized conditions, temporal acuity of the most sensitive units was nearly as sharp for brief as for long leading bursts. The differences in stimulus coding across pulse rates likely originate from pulse rate-dependent variations in adaptation in the auditory nerve. Two marked differences from responses to acoustic stimulation were: first, Trail-ON responses to 4,069 pps trains encoded substantially shorter gaps than have been observed with acoustic stimuli; and second, the Lead-OFF gap coding seen for <15 ms gaps in 254 pps stimuli is not seen in responses to sounds. The current results may help

  6. Real-time dual-microphone noise classification for environment-adaptive pipelines of cochlear implants.

    Science.gov (United States)

    Mirzahasanloo, Taher; Kehtarnavaz, Nasser

    2013-01-01

    This paper presents an improved noise classification in environment-adaptive speech processing pipelines of cochlear implants. This improvement is achieved by using a dual-microphone and by using a computationally efficient feature-level combination approach to achieve real-time operation. A new measure named Suppression Advantage is also defined in order to quantify the noise suppression improvement of an entire pipeline due to noise classification. The noise classification and suppression improvement results are presented for four commonly encountered noise environments.

  7. Prediction of Speech Recognition in Cochlear Implant Users by Adapting Auditory Models to Psychophysical Data

    Directory of Open Access Journals (Sweden)

    Svante Stadler

    2009-01-01

    Full Text Available Users of cochlear implants (CIs vary widely in their ability to recognize speech in noisy conditions. There are many factors that may influence their performance. We have investigated to what degree it can be explained by the users' ability to discriminate spectral shapes. A speech recognition task has been simulated using both a simple and a complex models of CI hearing. The models were individualized by adapting their parameters to fit the results of a spectral discrimination test. The predicted speech recognition performance was compared to experimental results, and they were significantly correlated. The presented framework may be used to simulate the effects of changing the CI encoding strategy.

  8. Evaluation of adaptive dynamic range optimization in adverse listening conditions for cochlear implants

    Science.gov (United States)

    Ali, Hussnain; Hazrati, Oldooz; Tobey, Emily A.; Hansen, John H. L

    2014-01-01

    The aim of this study is to investigate the effect of Adaptive Dynamic Range Optimization (ADRO) on speech identification for cochlear implant (CI) users in adverse listening conditions. In this study, anechoic quiet, noisy, reverberant, noisy reverberant, and reverberant noisy conditions are evaluated. Two scenarios are considered when modeling the combined effects of reverberation and noise: (a) noise is added to the reverberant speech, and (b) noisy speech is reverberated. CI users were tested in different listening environments using IEEE sentences presented at 65 dB sound pressure level. No significant effect of ADRO processing on speech intelligibility was observed. PMID:25190428

  9. Good practice guidelines for clinical psychologists working in paediatric cochlear implant teams.

    Science.gov (United States)

    Bathgate, Fionna; Bennett, Emily; Cropper, Jenny; Edwards, Lindsey; Emond, Alice; Gamble, Caroline; Kentish, Rosie; Samuel, Victoria

    2013-11-01

    There are relatively few clinical psychologists working in paediatric cochlear implant centres in the UK and in this respect we lag behind other countries such as the USA and The Netherlands. In an effort to promote the added value our profession can offer teams, the clinical psychologists working in paediatric CI centres have put together good practice guidelines. This article outlines the rationale for putting together the guidelines, highlights the unique contribution clinical psychologists can offer, outlines the evidence base for psychological input in this clinical population, and offers a fictional case study for illustration.

  10. Beyond hearing: social-emotional outcomes following cochlear implantation in young children

    OpenAIRE

    Ketelaar, Lizet

    2014-01-01

    In comparison to hearing children, children with hearing loss more often experience social-emotional problems. This thesis aimed to assess whether this was also true for 1-to-5-year-old children who had received a cochlear implant (CI) to remediate their hearing loss. In comparison to hearing peers, children with CI were found to be delayed on some but not all aspects of social-emotional functioning. No delays were found regarding social behavior or empathy. However, children with CI did show...

  11. The perception of stress pattern in young cochlear implanted children: an EEG study

    Directory of Open Access Journals (Sweden)

    Niki Katerina Vavatzanidis

    2016-03-01

    Full Text Available Children with sensorineural hearing loss may (regain hearing with a cochlear implant – a device that transforms sounds into electric pulses and bypasses the dysfunctioning inner ear by stimulating the auditory nerve directly with an electrode array. Many implanted children master the acquisition of spoken language successfully, yet we still have little knowledge of the actual input they receive with the implant and specifically which language sensitive cues they hear. This would be important however, both for understanding the flexibility of the auditory system when presented with stimuli after a (life-long phase of deprivation and for planning therapeutic intervention. In rhythmic languages the general stress pattern conveys important information about word boundaries. Infant language acquisition relies on such cues and can be severely hampered when this information is missing, as seen for dyslexic children and children with specific language impairment. Here we ask whether children with a cochlear implant perceive differences in stress patterns during their language acquisition phase and if they do, whether it is present directly following implant stimulation or if and how much time is needed for the auditory system to adapt to the new sensory modality. We performed a longitudinal ERP study, testing in bimonthly intervals the stress pattern perception of 17 young hearing impaired children (age range: 9-50 months; mean: 22 months during their first 6 months of implant use. An additional session before the implantation served as control baseline. During a session they passively listened to an oddball paradigm featuring the disyllable baba, which was stressed either on the first or second syllable (trochaic vs. iambic stress pattern. A group of age-matched normal hearing children participated as controls.Our results show, that within the first 6 months of implant use the implanted children develop a negative mismatch response for iambic but not

  12. Literacy Skills among Deaf and Hard of Hearing Students and Students with Cochlear Implants in Bilingual/Bicultural Education

    DEFF Research Database (Denmark)

    Dammeyer, Jesper Herup

    2014-01-01

    cochlear implantation was found to be significantly related to literacy skills. The results are discussed in relation to the Danish bilingual/bicultural approach in deaf education, an approach which appears to improve literacy skills among students with hearing impairment but does not eliminate all......Research has shown that many deaf students do not develop age-appropriate reading and writing abilities. This study evaluates the literacy skills of deaf students, hard of hearing students, and students with cochlear implants in bilingual/bicultural schools in Denmark. The results show that 45 per...

  13. Effects of stimulus level and rate on psychophysical thresholds for interleaved pulse trains in cochlear implants.

    Science.gov (United States)

    Hughes, Michelle L; Goehring, Jenny L; Baudhuin, Jacquelyn L; Schmid, Kendra K

    2016-10-01

    This study examined channel interactions using interleaved pulse trains to assess masking and potential facilitative effects in cochlear-implant recipients using clinically relevant stimuli. Psychophysical thresholds were measured for two adjacent mid-array electrodes; one served as the masker and the other as the probe. Two rates representative of those found in present-day strategies were tested: 1700 and 3400 pulses per second per channel. Four masker levels ranging from sub-threshold to loud-but-comfortable were tested. It was hypothesized that low-level maskers would produce facilitative effects, shifting to masking effects at high levels, and that faster rates would yield smaller masking effects due to greater stochastic neural firing patterns. Twenty-nine ears with Cochlear or Advanced Bionics devices were tested. High-level maskers produced more masking than low-level maskers, as expected. Facilitation was not observed for sub-threshold or threshold-level maskers in most cases. High masker levels yielded reduced probe thresholds for two Advanced Bionics subjects. This was partly eliminated with a longer temporal offset between each masker-probe pulse pair, as was used with Cochlear subjects. These findings support the use of temporal gaps between stimulation of subsequent electrodes to reduce channel interactions.

  14. Auditory cortical activity during cochlear implant-mediated perception of spoken language, melody, and rhythm.

    Science.gov (United States)

    Limb, Charles J; Molloy, Anne T; Jiradejvong, Patpong; Braun, Allen R

    2010-03-01

    Despite the significant advances in language perception for cochlear implant (CI) recipients, music perception continues to be a major challenge for implant-mediated listening. Our understanding of the neural mechanisms that underlie successful implant listening remains limited. To our knowledge, this study represents the first neuroimaging investigation of music perception in CI users, with the hypothesis that CI subjects would demonstrate greater auditory cortical activation than normal hearing controls. H(2) (15)O positron emission tomography (PET) was used here to assess auditory cortical activation patterns in ten postlingually deafened CI patients and ten normal hearing control subjects. Subjects were presented with language, melody, and rhythm tasks during scanning. Our results show significant auditory cortical activation in implant subjects in comparison to control subjects for language, melody, and rhythm. The greatest activity in CI users compared to controls was seen for language tasks, which is thought to reflect both implant and neural specializations for language processing. For musical stimuli, PET scanning revealed significantly greater activation during rhythm perception in CI subjects (compared to control subjects), and the least activation during melody perception, which was the most difficult task for CI users. These results may suggest a possible relationship between auditory performance and degree of auditory cortical activation in implant recipients that deserves further study.

  15. Implante coclear Digisonic SP® Binaural: acesso coronal tunelizado Digisonic SP® Binaural cochlear implant: the coronal tunneled approach

    Directory of Open Access Journals (Sweden)

    Guilherme Machado de Carvalho

    2013-06-01

    Full Text Available O implante coclear é um grande avanço no tratamento da surdez. Há grandes evidências que a audição bilateral traz diversas vantagens ao ser humano e muito mais quando se trata de audição binaural. OBJETIVO: Este artigo tem por objetivo descrever o primeiro caso operado no Brasil, sendo o terceiro país das Américas (México e Colômbia a realizar, com implante binaural Neurelec Digisonic SP® demonstrando a técnica cirúrgica. MÉTODO: Descrição da técnica cirúrgica. RESULTADOS: Ver técnica cirúrgica. Procedimento ocorreu sem intercorrências. DISCUSSÃO: O efeito "squelch", a somação binaural, a localização da fonte sonora e o efeito sombra da cabeça são umas das principais razões que justificam a superioridade da reabilitação binaural. O custo do tratamento deve ser levado em conta em políticas de saúde pública. CONCLUSÃO: Custo do implante coclear é um dos grandes limitadores da bilateralidade na reabilitação desse grupo de pacientes, porém, com essa tecnologia, é possível solucionar esse problema, expondo o paciente a poucos riscos, com o uso de uma técnica cirúrgica pouco invasiva.Cochlear implants represent a significant breakthrough in the treatment of hearing loss. Evidence indicates bilateral hearing brings significant benefits to patients, particularly when binaural hearing is offered. OBJECTIVE: To describe the first case of implantation of a Digisonic SP® Binaural Neurelec device in Brazil (the third implant placed in the Americas, after Mexico and Colombia and the chosen surgical approach. METHOD: Description of a surgical approach. RESULTS: The procedure was successfully completed. DISCUSSION: The squelch effect, binaural summation, location of the sound source, and the shadow effect of the head are listed among the reasons to explain the superiority of binaural rehabilitation. Cost of treatment must be considered in the development of public health policies. CONCLUSION: The cost of cochlear

  16. A Fully-Implantable Cochlear Implant SoC with Piezoelectric Middle-Ear Sensor and Arbitrary Waveform Neural Stimulation.

    Science.gov (United States)

    Yip, Marcus; Jin, Rui; Nakajima, Hideko Heidi; Stankovic, Konstantina M; Chandrakasan, Anantha P

    2015-01-01

    A system-on-chip for an invisible, fully-implantable cochlear implant is presented. Implantable acoustic sensing is achieved by interfacing the SoC to a piezoelectric sensor that detects the sound-induced motion of the middle ear. Measurements from human cadaveric ears demonstrate that the sensor can detect sounds between 40 and 90 dB SPL over the speech bandwidth. A highly-reconfigurable digital sound processor enables system power scalability by reconfiguring the number of channels, and provides programmable features to enable a patient-specific fit. A mixed-signal arbitrary waveform neural stimulator enables energy-optimal stimulation pulses to be delivered to the auditory nerve. The energy-optimal waveform is validated with in-vivo measurements from four human subjects which show a 15% to 35% energy saving over the conventional rectangular waveform. Prototyped in a 0.18 μm high-voltage CMOS technology, the SoC in 8-channel mode consumes 572 μW of power including stimulation. The SoC integrates implantable acoustic sensing, sound processing, and neural stimulation on one chip to minimize the implant size, and proof-of-concept is demonstrated with measurements from a human cadaver ear.

  17. [Postoperative complications of cochlear implant: eight years of experience].

    Science.gov (United States)

    Yépez-Pabón, Daniela; Guevara-Sánchez, Marco

    2015-01-01

    Introducción: el implante coclear es una cirugía con poca morbimortalidad. Las complicaciones posquirúrgicas pueden ser menores y mayores. Las menores requieren manejo conservador; las mayores, reintervención o retiro del implante. El objetivo de este trabajo es determinar nuestras complicaciones y cotejarlas con series internacionales y latinoamericanas. Métodos: se analizan retrospectivamente 275 casos intervenidos entre diciembre 2005 y diciembre 2013. Se incluyen niños y adultos entre 11 meses hasta 82 años de edad. Se evalúan datos demográficos, colocación uni o bilateral, tipo de cirugía y las complicaciones posquirúrgicas. El seguimiento fue por 20 meses. Resultados: el 57.46 % son niños y adolescentes; el 33.81 % jóvenes y adultos, y el 8.73 % adultos mayores. El índice de complicaciones es del 12 % (n = 33), 6.91 % en mujeres y 5.09 % en hombres. Entre los 19 a 60 años hay más complicaciones. Las complicaciones menores representan el 7.64 %: infección local (n = 9), parálisis facial transitoria tardía (n = 7), vértigo (n = 3) y tinnitus (n = 2). Prevalecen en niños y adultos. Las complicaciones mayores son el 4.36 %: hematomas postquirúrgicos (n = 8), extrusiones (n = 2) e inadecuada colocación de electrodos (n = 2). Predominan en los adultos entre 19 a 60 años. No se presentan casos de meningitis ni decesos. Conclusiones: la implantación coclear tiene baja incidencia de complicaciones. Nuestros resultados, los únicos reportados a nivel nacional, son similares a los que menciona la literatura.

  18. Factors associated with hearing loss in a normal-hearing guinea pig model of Hybrid cochlear implants.

    Science.gov (United States)

    Tanaka, Chiemi; Nguyen-Huynh, Anh; Loera, Katherine; Stark, Gemaine; Reiss, Lina

    2014-10-01

    The Hybrid cochlear implant (CI), also known as Electro-Acoustic Stimulation (EAS), is a new type of CI that preserves residual acoustic hearing and enables combined cochlear implant and hearing aid use in the same ear. However, 30-55% of patients experience acoustic hearing loss within days to months after activation, suggesting that both surgical trauma and electrical stimulation may cause hearing loss. The goals of this study were to: 1) determine the contributions of both implantation surgery and EAS to hearing loss in a normal-hearing guinea pig model; 2) determine which cochlear structural changes are associated with hearing loss after surgery and EAS. Two groups of animals were implanted (n = 6 per group), with one group receiving chronic acoustic and electric stimulation for 10 weeks, and the other group receiving no direct acoustic or electric stimulation during this time frame. A third group (n = 6) was not implanted, but received chronic acoustic stimulation. Auditory brainstem response thresholds were followed over time at 1, 2, 6, and 16 kHz. At the end of the study, the following cochlear measures were quantified: hair cells, spiral ganglion neuron density, fibrous tissue density, and stria vascularis blood vessel density; the presence or absence of ossification around the electrode entry was also noted. After surgery, implanted animals experienced a range of 0-55 dB of threshold shifts in the vicinity of the electrode at 6 and 16 kHz. The degree of hearing loss was significantly correlated with reduced stria vascularis vessel density and with the presence of ossification, but not with hair cell counts, spiral ganglion neuron density, or fibrosis area. After 10 weeks of stimulation, 67% of implanted, stimulated animals had more than 10 dB of additional threshold shift at 1 kHz, compared to 17% of implanted, non-stimulated animals and 0% of non-implanted animals. This 1-kHz hearing loss was not associated with changes in any of the cochlear measures

  19. Speech encoding strategies for multielectrode cochlear implants: a digital signal processor approach.

    Science.gov (United States)

    Dillier, N; Bögli, H; Spillmann, T

    1993-01-01

    The following processing strategies have been implemented on an experimental laboratory system of a cochlear implant digital speech processor (CIDSP) for the Nucleus 22-channel cochlear prosthesis. The first approach (PES, Pitch Excited Sampler) is based on the maximum peak channel vocoder concept whereby the time-varying spectral energy of a number of frequency bands is transformed into electrical stimulation parameters for up to 22 electrodes. The pulse rate at any electrode is controlled by the voice pitch of the input speech signal. The second approach (CIS, Continuous Interleaved Sampler) uses a stimulation pulse rate which is independent of the input signal. The algorithm continuously scans all specified frequency bands (typically between four and 22) and samples their energy levels. As only one electrode can be stimulated at any instance of time, the maximally achievable rate of stimulation is limited by the required stimulus pulse widths (determined individually for each subject) and some additional constraints and parameters. A number of variations of the CIS approach have, therefore, been implemented which either maximize the number of quasi-simultaneous stimulation channels or the pulse rate on a reduced number of electrodes. Evaluation experiments with five experienced cochlear implant users showed significantly better performance in consonant identification tests with the new processing strategies than with the subjects' own wearable speech processors; improvements in vowel identification tasks were rarely observed. Modifications of the basic PES- and CIS strategies resulted in large variations of identification scores. Information transmission analysis of confusion matrices revealed a rather complex pattern across conditions and speech features. Optimization and fine-tuning of processing parameters for these coding strategies will require more data both from speech identification and discrimination evaluations and from psychophysical experiments.

  20. Written Language Ability in Mandarin-Speaking Children with Cochlear Implants.

    Science.gov (United States)

    Wu, Che-Ming; Ko, Hui-Chen; Chen, Yen-An; Tsou, Yung-Ting; Chao, Wei-Chieh

    2015-01-01

    Objectives. To examine narrative writing in cochlear implant (CI) children and understand the factors associated with unfavorable outcomes. Materials and Methods. Forty-five CI children in grades 2-6 participated in this study. They received CIs at 4.1 ± 2.1 years of age and had used them for 6.5 ± 2.7 years. A story-writing test was conducted and scored on 4 subscales: Total Number of Words, Words per Sentence, Morphosyntax, and Semantics. Scores more than 1.5 SD lower than the mean of the normal-hearing normative sample were considered problematic. Language and speech skills were examined. Results. Significantly more implanted students were problematic on "Total Number of Words" (p write stories that are shorter, worse-organized, and without a plot, while formulating morphosyntactically correct sentences. Special attention is required on their auditory and language performances, which could lead to written language problems.

  1. Modelling of the Human Inner Ear Anatomy and Variability for Cochlear Implant Applications

    DEFF Research Database (Denmark)

    Kjer, Hans Martin

    several challenges concerning data processing and analysis. Our approach is to describe the inner ear as a statistical shape model. The thesis covers our work with regards to data segmentation, shape characterization, development of image registration model suited for the inner ear and construction......This thesis takes the biomedical engineering approach to working with and understanding the anatomy and physiology of the inner ear. The purpose is to apply the acquired knowledge in the development of implantable hearing aids. The so-called Cochlear Implant (CI) is a fascinating technology...... of statistical deformation models. The thesis results in a series of applications relating to CIs. The shape model can be used by CI-manufacturers for virtual product development and testing. At the same time, it can be applied to estimate the detailed inner ear shape from a clinical patient CT scan. This opens...

  2. Use of Pericranial Flap Coverage in Cochlear Implantation of the Radical Cavity: Rationale, Technique, and Experience.

    Science.gov (United States)

    Nieman, Carrie L; Weinreich, Heather M; Sharon, Jeffrey D; Chien, Wade W; Francis, Howard W

    2016-09-01

    Cochlear implant (CI) surgery in the setting of an open mastoid cavity is evolving. Two strategies are commonly pursued: a staged approach, clearing the disease, closing the meatus or the external auditory canal (EAC), and reevaluating in 3 to 6 months prior to implantation, or a single-stage procedure with mastoid obliteration without EAC closure. Meatal closure is often employed in the setting of an open mastoid cavity to reduce the risk of electrode extrusion and infection. An open cavity offers the advantages of being a single-stage procedure, permitting direct surveillance for recurrent cholesteatoma, and reducing the need for repeat computed tomography scans. We describe an approach to the coverage of a CI within a dry, open mastoid cavity using an anteriorly-based postauricular pericranial flap.

  3. Number processing and arithmetic skills in children with cochlear implants

    Science.gov (United States)

    Pixner, Silvia; Leyrer, Martin; Moeller, Korbinian

    2014-01-01

    Though previous findings report that hearing impaired children exhibit impaired language and arithmetic skills, our current understanding of how hearing and the associated language impairments may influence the development of arithmetic skills is still limited. In the current study numerical/arithmetic performance of 45 children with a cochlea implant were compared to that of controls matched for hearing age, intelligence and sex. Our main results were twofold disclosing that children with CI show general as well as specific numerical/arithmetic impairments. On the one hand, we found an increased percentage of children with CI with an indication of dyscalculia symptoms, a general slowing in multiplication and subtraction as well as less accurate number line estimations. On the other hand, however, children with CI exhibited very circumscribed difficulties associated with place-value processing. Performance declined specifically when subtraction required a borrow procedure and number line estimation required the integration of units, tens, and hundreds instead of only units and tens. Thus, it seems that despite initially atypical language development, children with CI are able to acquire arithmetic skills in a qualitatively similar fashion as their normal hearing peers. Nonetheless, when demands on place-value understanding, which has only recently been proposed to be language mediated, hearing impaired children experience specific difficulties. PMID:25566152

  4. Number processing and arithmetic skills in children with cochlear implants

    Directory of Open Access Journals (Sweden)

    Silvia ePixner

    2014-12-01

    Full Text Available Though previous findings report that hearing impaired children exhibit impaired language and arithmetic skills, our current understanding of how hearing and the associated language impairments may influence the development of arithmetic skills is still limited. In the current study numerical/arithmetic performance of 45 children with a cochlea implant were compared to that of controls matched for hearing age, intelligence and sex. Our main results were twofold disclosing that children with CI show general as well as specific numerical/arithmetic impairments. On the one hand, we found an increased percentage of children with CI with an indication of dyscalculia symptoms, a general slowing in multiplication and subtraction as well as less accurate number line estimations. On the other hand, however, children with CI exhibited very circumscribed difficulties associated with place-value processing. Performance declined specifically when subtraction required a borrow procedure and number line estimation required the integration of units, tens, and hundreds instead of only units and tens. Thus, it seems that despite initially atypical language development, children with CI are able to acquire arithmetic skills in a qualitatively similar fashion as their normal hearing peers. Nonetheless, when demands on place-value understanding, which has only recently been proposed to be language mediated, hearing impaired children experience specific difficulties.

  5. Effects of cochlear implantation on ipsilateral tinnitus%人工耳蜗植入对成人语后聋患者同侧耳鸣的影响

    Institute of Scientific and Technical Information of China (English)

    陶朵朵; 陈兵

    2012-01-01

    Objective Cochlear implantation is the current standard of care in patients with significant sensorineural hearing loss.The purpose of this study was to assess the effects of cochlear implantation on ipsilateral tinnitus.Methods With standard assessment table and standard testing program,48 postlingual hearing-impaired adults aged 18 -62 years(mean age at implantation:35.0)were operated at 5 clinical centers from June 2009 to March 2010.There were 23 males(47.9%)and 25 females (52.1%).We evaluated the pre- and post-implantation degrees of tinnitus,performed free sound field audiometry and scored speech perceptiou during different periods.Secondary analyses were conducted to examine the correlation between the effects of implantation on tinnitus and hearing or speech perception rehabilitation.Results Before implantation,there were 16 cases with ipsilateral tinnitus and 32 cases without tinnitus.After implantation,among 16 cases,the outcomes were recovery(n =6),tinnitus suppression(n =1)and no change in symptoms(n =9).The total effective rate was 43.8%.Among another 32 cases without preoperative tinnitus,2 cases developed tinnitus after implantation.The effects of cochlear implantation on tinnitus were negatively correlated with the course of tinnitus.There was no more correlation with other factors.Conclusion Cochlear implants have significant therapeutic effects on tinnitus in 43.8% of implant users.Better efficacies are correlated with a shorter course of tinnitus.However,tinnitus suppression using electrical stimulation via cochlear implantation for deafness needs to be further evaluated.%目的 观察人工耳蜗植入者手术前后同侧耳鸣变化情况,评估人工耳蜗植入对耳鸣的影响.方法 对48例在国内5个三甲医院行REZ-1人工耳蜗植入者进行手术前后耳鸣程度评估,根据疗效评定标准评价人工耳蜗植入对耳鸣的干预作用,并对可能影响干预作用的相关因素进行统计分析.结果 48例人

  6. Cognitive Compensation of Speech Perception With Hearing Impairment, Cochlear Implants, and Aging

    Directory of Open Access Journals (Sweden)

    Deniz Başkent

    2016-10-01

    Full Text Available External degradations in incoming speech reduce understanding, and hearing impairment further compounds the problem. While cognitive mechanisms alleviate some of the difficulties, their effectiveness may change with age. In our research, reviewed here, we investigated cognitive compensation with hearing impairment, cochlear implants, and aging, via (a phonemic restoration as a measure of top-down filling of missing speech, (b listening effort and response times as a measure of increased cognitive processing, and (c visual world paradigm and eye gazing as a measure of the use of context and its time course. Our results indicate that between speech degradations and their cognitive compensation, there is a fine balance that seems to vary greatly across individuals. Hearing impairment or inadequate hearing device settings may limit compensation benefits. Cochlear implants seem to allow the effective use of sentential context, but likely at the cost of delayed processing. Linguistic and lexical knowledge, which play an important role in compensation, may be successfully employed in advanced age, as some compensatory mechanisms seem to be preserved. These findings indicate that cognitive compensation in hearing impairment can be highly complicated—not always absent, but also not easily predicted by speech intelligibility tests only.

  7. CT-Scans of Cochlear Implant Patients with Characteristics of Pendred Syndrome

    Directory of Open Access Journals (Sweden)

    Sebastian Roesch

    2013-12-01

    Full Text Available Background: Sensorineural hearing loss (SNHL in newborns is estimated with an incidence around 1:10,000 per year and is divided into syndromic and non-syndromic forms. In case of present retrocochlear function‚ cochlear implantation allows speech and cognitive development in affected children, comparable to that of normal hearing children. Pathogenesis of SNHL remains unclear in many cases. Imaging of the temporal bone, such as computed tomography (CT and magnetic resonance imaging (MRI, can reveal conspicuous findings, e.g. enlarged vestibular aqueduct (EVA and Mondini malformation (MM of the cochlea. These malformations can be a clinical sign for Pendred syndrome. Methods: We screened CT scans of 75 cochlear implant patients for EVA and MM. Results: Six patients were observed to have either EVA alone (n=3, or MM alone (n=2, or a combination of both (n=1. Further malformations of the temporal bone could be found within the whole group, as well. Conclusion: Our results confirm the general opinion on EVA and MM, being commonly found in patients with SNHL. A possible association with Pendred syndrome needs to be confirmed by genetic investigations with search for mutations in the SLC26A4 gene and further clinical tests, such as Perchlorate test for surveillance of thyroid function.

  8. Cognitive Compensation of Speech Perception With Hearing Impairment, Cochlear Implants, and Aging

    Science.gov (United States)

    Clarke, Jeanne; Pals, Carina; Benard, Michel R.; Bhargava, Pranesh; Saija, Jefta; Sarampalis, Anastasios; Wagner, Anita; Gaudrain, Etienne

    2016-01-01

    External degradations in incoming speech reduce understanding, and hearing impairment further compounds the problem. While cognitive mechanisms alleviate some of the difficulties, their effectiveness may change with age. In our research, reviewed here, we investigated cognitive compensation with hearing impairment, cochlear implants, and aging, via (a) phonemic restoration as a measure of top-down filling of missing speech, (b) listening effort and response times as a measure of increased cognitive processing, and (c) visual world paradigm and eye gazing as a measure of the use of context and its time course. Our results indicate that between speech degradations and their cognitive compensation, there is a fine balance that seems to vary greatly across individuals. Hearing impairment or inadequate hearing device settings may limit compensation benefits. Cochlear implants seem to allow the effective use of sentential context, but likely at the cost of delayed processing. Linguistic and lexical knowledge, which play an important role in compensation, may be successfully employed in advanced age, as some compensatory mechanisms seem to be preserved. These findings indicate that cognitive compensation in hearing impairment can be highly complicated—not always absent, but also not easily predicted by speech intelligibility tests only.

  9. Adaptive dynamic range optimization (ADRO): a digital amplification strategy for hearing aids and cochlear implants.

    Science.gov (United States)

    Blamey, Peter J

    2005-01-01

    Adaptive dynamic range optimization (ADRO) is an amplification strategy that uses digital signal processing techniques to improve the audibility, comfort, and intelligibility of sounds for people who use cochlear implants and/or hearing aids. The strategy uses statistical analysis to select the most information-rich section of the input dynamic range in multiple-frequency channels. Fuzzy logic rules control the gain in each frequency channel so that the selected section of the dynamic range is presented at an audible and comfortable level. The ADRO processing thus adaptively optimizes the dynamic range of the signal in multiple-frequency channels. Clinical studies show that ADRO can be fitted easily to all degrees of hearing loss for hearing aids and cochlear implants in a direct and intuitive manner, taking the preferences of the listener into account. The result is high acceptance by new and experienced hearing aid users and strong preferences for ADRO compared with alternative amplification strategies. The ADRO processing is particularly well suited to bimodal and hybrid stimulation which combine electric and acoustic stimulation in opposite ears or in the same ear, respectively.

  10. Exploring the discourse on communication modality after cochlear implantation: a Foucauldian analysis of parents' narratives.

    Science.gov (United States)

    Bruin, Marieke; Nevøy, Anne

    2014-07-01

    After pediatric cochlear implantation, parents have to make decisions concerning which communication modality the child and the child's family will use. The choice has to be made against a background of opposing views on communication modality in follow-up after pediatric cochlear implantation. The opposing views form a discourse that has been a core issue in the international body of literature for a long time. For hearing parents caught up in this ongoing controversy, the choice can be a difficult one. The study reported in this article explores the discourse on communication modality and is based on 27 written parental accounts on experiences with follow-up. From the perspective of Foucault's thinking, discourses exert knowledge and power. Drawing on Foucault, the study explores how the discourse on communication modality is constructed, how it operates, and how it governs thinking and acting. The Foucauldian analysis brings to the fore the complex nature of the discourse and states that follow-up, which is intended to be helpful for parents, may induce insecurity and frustration. The study brings into conversation a broader understanding of the discourse on communication modality and addresses a need for increased awareness on how the discourse governs thinking and acting in follow-up.

  11. Speech intelligibility, speaking rate, and vowel formant characteristics in Mandarin-speaking children with cochlear implant.

    Science.gov (United States)

    Chuang, Hsiu-Feng; Yang, Cheng-Chieh; Chi, Lin-Yang; Weismer, Gary; Wang, Yu-Tsai

    2012-04-01

    The effects of the use of cochlear implant (CI) on speech intelligibility, speaking rate, and vowel formant characteristics and the relationships between speech intelligibility, speaking rate, and vowel formant characteristics for children are clinically important. The purposes of this study were to report on the comparisons for speaking rate and vowel space area, and their relationship with speech intelligibility, between 24 Mandarin-speaking children with CI and 24 age-sex-education level matched normal hearing (NH) controls. Participants were audio recorded as they read a designed Mandarin intelligibility test, repeated prolongation of each of the three point vowels /i/, /a/, and /u/ five times, and repeated each of three sentences carrying one point vowel five times. Compared to the NH group, the CI group exhibited: (1) mild-to-moderate speech intelligibility impairment; (2) significantly reduced speaking rate mainly due to significantly longer inter-word pauses and larger pause proportion; and (3) significantly less vowel reduction in the horizontal dimension in sustained vowel phonation. The limitations of speech intelligibility development in children after cochlear implantation were related to atypical patterns and to a smaller degree in vowel reduction and slower speaking rate resulting from less efficient articulatory movement transition.

  12. Benefits and detriments of unilateral cochlear implant use on bilateral auditory development in children who are deaf

    Directory of Open Access Journals (Sweden)

    Karen A. Gordon

    2013-10-01

    Full Text Available We have explored both the benefits and detriments of providing electrical input through a cochlear implant in one ear to the auditory system of young children. A cochlear implant delivers electrical pulses to stimulate the auditory nerve, providing children who are deaf with access to sound. The goals of implantation are to restrict reorganization of the deprived immature auditory brain and promote development of hearing and spoken language. It is clear that limiting the duration of deprivation is a key factor. Additional considerations are the onset, etiology, and use of residual hearing as each of these can have unique effects on auditory development in the pre-implant period. New findings show that many children receiving unilateral cochlear implants are developing mature-like brainstem and thalamo-cortical responses to sound with long term use despite these sources of variability; however, there remain considerable abnormalities in cortical function. The most apparent, determined by implanting the other ear and measuring responses to acute stimulation, is a loss of normal cortical response from the deprived ear. Recent data reveal that this can be avoided in children by early implantation of both ears simultaneously or with limited delay. We conclude that auditory development requires input early in development and from both ears.

  13. Long-term outcomes on spatial hearing, speech recognition and receptive vocabulary after sequential bilateral cochlear implantation in children.

    Science.gov (United States)

    Sparreboom, Marloes; Langereis, Margreet C; Snik, Ad F M; Mylanus, Emmanuel A M

    2014-11-05

    Sequential bilateral cochlear implantation in profoundly deaf children often leads to primary advantages in spatial hearing and speech recognition. It is not yet known how these children develop in the long-term and if these primary advantages will also lead to secondary advantages, e.g. in better language skills. The aim of the present longitudinal cohort study was to assess the long-term effects of sequential bilateral cochlear implantation in children on spatial hearing, speech recognition in quiet and in noise and receptive vocabulary. Twenty-four children with bilateral cochlear implants (BiCIs) were tested 5-6 years after sequential bilateral cochlear implantation. These children received their second implant between 2.4 and 8.5 years of age. Speech and language data were also gathered in a matched reference group of 26 children with a unilateral cochlear implant (UCI). Spatial hearing was assessed with a minimum audible angle (MAA) task with different stimulus types to gain global insight into the effective use of interaural level difference (ILD) and interaural timing difference (ITD) cues. In the long-term, children still showed improvements in spatial acuity. Spatial acuity was highest for ILD cues compared to ITD cues. For speech recognition in quiet and noise, and receptive vocabulary, children with BiCIs had significant higher scores than children with a UCI. Results also indicate that attending a mainstream school has a significant positive effect on speech recognition and receptive vocabulary compared to attending a school for the deaf. Despite of a period of unilateral deafness, children with BiCIs, participating in mainstream education obtained age-appropriate language scores.

  14. Cochlear implants for the patients with cochlear nerve defects%蜗神经发育不良患者的人工耳蜗植入

    Institute of Scientific and Technical Information of China (English)

    胡凌翔; 吴皓; 黄琦; 李蕴; 汪照炎; 张治华; 吕静荣

    2013-01-01

    Objective: By watching the effects of cochlear implants in the children with cochlear nerve defects, to evaluate the relationship and efficiency of HRCT AND MRI in diagnostic for cochlear nerve defects. Method: The imaging dates and the post-operative effects of the 10 cochlear nerve defect patients were retrospectively analyzed. Result: Three patients with bilateral IAC stenosis by HRCT and cochlear nerve defects by MRI but no other abnormal. Seven other patients showed normanl IAC by HRCT including 1 showed type IP- I plus vestibular semicircular canal dysplasia. These 7 patients MRI showed 3 bilateral cochlear nerve absent and 4 bilateral cochlear nerve dysplasia. Ten cases of children after 12-32 month follow-up, 3 patients began speaking simple language, whose MAIS scale, CAP and SIR scores improved. One case just began speaking but pronunciation vague. Four cases had reactions to sounds, and can say monosyllabic words. Two cases without effects(1 CI abolished). Compared with other patients with normal cochlear nerve, the effects of the 10 cases were disappointed. Conclusion; The effects of cochlear implant for the patients with cochlear nerve defects were poor. The preoperative MRI assessment including oblique sagittal view for cochlear nerve is necessary. The preoperative communication with the parents telling ineffective result possibility is important.%目的:观察蜗神经发育不良的患儿人工耳蜗植入术后的效果,探讨术前HRCT和MRI对蜗神经发育不良的诊断及评估价值.方法:回顾性分析10例蜗神经发育不良患儿的术前影像学资料及人工耳蜗植入术后对声音的反应和语训效果.结果:3例(6耳)HRCT提示双侧内耳道狭窄,耳蜗、前庭和半规管发育正常,MRI提示蜗神经发育不良.7例(14耳)HRCT提示双侧内耳道正常,其中1例IP-Ⅰ型,伴前庭半规管发育不良,6例双侧耳蜗、前庭和半规管发育正常;7例MRI提示蜗神经发育异常.10例患

  15. Speech and language evaluation for cochlear implant%人工耳蜗的言语评估

    Institute of Scientific and Technical Information of China (English)

    张华; 王靓; 王硕; 陈雪清; 陈静

    2005-01-01

    OBJECTIVE: In the last decade, cochlear implantation(CI) has achieved great progress in quantity and research in China. But our researches on speech audiometry, the major index of CI, is relatively slow, or it is hard to compare with European, Australian and American results. Based on the review of the development and application of English speech audiometry, this paper mainly analyzed the composition, testing method and applicative range of the existing English speech test materials and introduced the primary speech and language evaluation tool recommended by the present American expert committee. This paper also made some suggestions for further researches on Chinese evaluation tools, which was anticipated to be useful for the domestic development in this field, based on the review of Chinese tests and aimed on the present evaluation tool.DATA SOURCES: Articles related to auditory researches during January 1964 to April 2004 were searched by the computer with the searching words of "cochlear implant, speech audiometry" in Medline. The language of the articles was limited to English. Corresponding articles during January 1998to April 2004 were searched manually or by computer in "Chinese Journal Clinical Rehabilitation" periodicals with the searching words of "cochlear implant, speech and language evaluation, cochlear implant". The language of the articles was limited to Chinese.DATA SELECTION: Totally 39 national and international original literatures regarding cochlear implant evaluation were selected. Original literatures of non-randomized researches were excluded while original literatures of non-blindness researches were not excluded.DATA EXTRACTION: In 39 literatures regarding cochlear implant evaluation, 32 of them were in accordance with the criteria. The rest 7 articles were excluded due to the repetition of the same research. The selected 32articles regarding cochlear implant evaluation were classified and arranged for literature review.DATA SYNTHESIS

  16. Literacy Skills among Deaf and Hard of Hearing Students and Students with Cochlear Implants in Bilingual/bicultural Education

    Science.gov (United States)

    Dammeyer, Jesper

    2014-01-01

    Research has shown that many deaf students do not develop age-appropriate reading and writing abilities. This study evaluates the literacy skills of deaf students, hard of hearing students, and students with cochlear implants in bilingual/bicultural schools in Denmark. The results show that 45 per cent of the students did not have any reading and…

  17. The Modes of Communication Used by Children with Cochlear Implants and the Role of Sign in Their Lives

    Science.gov (United States)

    Hyde, Merv; Punch, Renee

    2011-01-01

    In a mixed-methods study, which included surveys of 247 parents and 151 teachers, the researchers investigated the modes of communication used by children with cochlear implants and the role of signed communication in the children's lives. Findings indicated that 15%-20% of the children in the parent surveys and approximately 30% of the children…

  18. How Do Deaf Children with and without Cochlear Implants Manage to Read Sentences: The Key Word Strategy

    Science.gov (United States)

    Domínguez, Ana-Belén; Carrillo, María-Soledad; González, Virginia; Alegria, Jesús

    2016-01-01

    The aim of this study is to examine the mechanisms used by deaf children with and without cochlear implants (CIs) to read sentences and the linguistic bases (vocabulary and syntax) underlying those reading mechanisms. Previous studies have shown that deaf persons read sentences using the key word strategy (KWS), which consists of identifying some…

  19. Social Participation of Children and Adolescents with Cochlear Implants: A Qualitative Analysis of Parent, Teacher, and Child Interviews

    Science.gov (United States)

    Punch, Renee; Hyde, Merv

    2011-01-01

    Psychosocial factors, including socioemotional well-being, peer relationships, and social inclusion with hearing and deaf peers, are increasingly becoming a focus of research investigating children with cochlear implants. The study reported here extends the largely quantitative findings of previous research through a qualitative analysis of…

  20. Language Processing in Children with Cochlear Implants: A Preliminary Report on Lexical Access for Production and Comprehension

    Science.gov (United States)

    Schwartz, Richard G.; Steinman, Susan; Ying, Elizabeth; Mystal, Elana Ying; Houston, Derek M.

    2013-01-01

    In this plenary paper, we present a review of language research in children with cochlear implants along with an outline of a 5-year project designed to examine the lexical access for production and recognition. The project will use auditory priming, picture naming with auditory or visual interfering stimuli (Picture-Word Interference and…

  1. Dual Language versus English-Only Support for Bilingual Children with Hearing Loss Who Use Cochlear Implants and Hearing Aids

    Science.gov (United States)

    Bunta, Ferenc; Douglas, Michael; Dickson, Hanna; Cantu, Amy; Wickesberg, Jennifer; Gifford, René H.

    2016-01-01

    Background: There is a critical need to understand better speech and language development in bilingual children learning two spoken languages who use cochlear implants (CIs) and hearing aids (HAs). The paucity of knowledge in this area poses a significant barrier to providing maximal communicative outcomes to a growing number of children who have…

  2. Academic Outcomes for School-Aged Children with Severe-Profound Hearing Loss and Early Unilateral and Bilateral Cochlear Implants

    Science.gov (United States)

    Sarant, Julia Z.; Harris, David C.; Bennet, Lisa A.

    2015-01-01

    Purpose: This study sought to (a) determine whether academic outcomes for children who received early cochlear implants (CIs) are age appropriate, (b) determine whether bilateral CI use significantly improves academic outcomes, and (c) identify other factors that are predictive of these outcomes. Method: Forty-four 8-year-old children with…

  3. Simulating the Effects of Spread of Electric Excitation on Musical Tuning and Melody Identification with a Cochlear Implant

    Science.gov (United States)

    Spahr, Anthony J.; Litvak, Leonid M.; Dorman, Michael F.; Bohanan, Ashley R.; Mishra, Lakshmi N.

    2008-01-01

    Purpose: To determine why, in a pilot study, only 1 of 11 cochlear implant listeners was able to reliably identify a frequency-to-electrode map where the intervals of a familiar melody were played on the correct musical scale. The authors sought to validate their method and to assess the effect of pitch strength on musical scale recognition in…

  4. The effect of music on auditory perception in cochlear-implant users and normal-hearing listeners

    NARCIS (Netherlands)

    Fuller, Christina Diechina

    2016-01-01

    Cochlear implants (CIs) are auditory prostheses for severely deaf people that do not benefit from conventional hearing aids. Speech perception is reasonably good with CIs; other signals such as music perception are challenging. First, the perception of music and music related perception in CI users

  5. Speech Production Accuracy and Variability in Young Cochlear Implant Recipients: Comparisons with Typically Developing Age-Peers

    Science.gov (United States)

    Ertmer, David J.; Goffman, Lisa A.

    2011-01-01

    Purpose: The speech production accuracy and variability scores of 6 young cochlear implant (CI) recipients with 2 years of device experience were compared with those of typically developing (TD) age-peers. Method: Words from the First Words Speech Test (FWST; Ertmer, 1999) were imitated 3 times to assess the accuracy and variability of initial…

  6. Pragmatic Abilities of Children with Hearing Loss Using Cochlear Implants or Hearing Aids Compared to Hearing Children

    Science.gov (United States)

    Most, Tova; Shina-August, Ella; Meilijson, Sara

    2010-01-01

    This study characterized the profile of pragmatic abilities among 24 children with hearing loss (HL) aged 6.3-9.4 years, 13 using hearing aids (HAs) and 11 using cochlear implants (CIs), in comparison to those of 13 hearing children with similar chronological and language ages. All the children with HL used spoken language, attended regular…

  7. Deaf Families with Children Who Have Cochlear Implants: Perspectives and Beliefs on Bilingualism in American Sign Language and English

    Science.gov (United States)

    Mitchiner, Julie Cantrell

    2012-01-01

    This study examines Deaf parents with children who have cochlear implants on their beliefs and perspectives of bilingualism in American Sign Language and English using complementary mixed methods through surveys and follow-up interviews. Seventeen families participated in the survey and eight families continued their participation in semi-formal…

  8. Point Vowel Duration in Children with Hearing Aids and Cochlear Implants at 4 and 5 Years of Age

    Science.gov (United States)

    Vandam, Mark; Ide-Helvie, Dana; Moeller, Mary Pat

    2011-01-01

    This work investigates the developmental aspects of the duration of point vowels in children with normal hearing compared with those with hearing aids and cochlear implants at 4 and 5 years of age. Younger children produced longer vowels than older children, and children with hearing loss (HL) produced longer and more variable vowels than their…

  9. Acoustic to electric pitch comparisons in cochlear implant subjects with residual hearing.

    Science.gov (United States)

    Boëx, Colette; Baud, Lionel; Cosendai, Grégoire; Sigrist, Alain; Kós, Maria-Izabel; Pelizzone, Marco

    2006-06-01

    The aim of this study was to assess the frequency-position function resulting from electric stimulation of electrodes in cochlear implant subjects with significant residual hearing in their nonimplanted ear. Six cochlear implant users compared the pitch of the auditory sensation produced by stimulation of an intracochlear electrode to the pitch of acoustic pure tones presented to their contralateral nonimplanted ear. Subjects were implanted with different Clarion electrode arrays, designed to lie close to the inner wall of the cochlea. High-resolution radiographs were used to determine the electrode positions in the cochlea. Four out of six subjects presented electrode insertions deeper than 450 degrees . We used a two-interval (one acoustic, one electric), two-alternative forced choice protocol (2I-2AFC), asking the subject to indicate which stimulus sounded the highest in pitch. Pure tones were used as acoustic stimuli. Electric stimuli consisted of trains of biphasic pulses presented at relatively high rates [higher than 700 pulses per second (pps)]. First, all electric stimuli were balanced in loudness across electrodes. Second, acoustic pure tones, chosen to approximate roughly the pitch sensation produced by each electrode, were balanced in loudness to electric stimuli. When electrode insertion lengths were used to describe electrode positions, the pitch sensations produced by electric stimulation were found to be more than two octaves lower than predicted by Greenwood's frequency-position function. When insertion angles were used to describe electrode positions, the pitch sensations were found about one octave lower than the frequency-position function of a normal ear. The difference found between both descriptions is because of the fact that these electrode arrays were designed to lie close to the modiolus. As a consequence, the site of excitation produced at the level of the organ of Corti corresponds to a longer length than the electrode insertion length

  10. Development of language and speech perception in congenitally, profoundly deaf children as a function of age at cochlear implantation.

    Science.gov (United States)

    Svirsky, Mario A; Teoh, Su-Wooi; Neuburger, Heidi

    2004-01-01

    Like any other surgery requiring anesthesia, cochlear implantation in the first few years of life carries potential risks, which makes it important to assess the potential benefits. This study introduces a new method to assess the effect of age at implantation on cochlear implant outcomes: developmental trajectory analysis (DTA). DTA compares curves representing change in an outcome measure over time (i.e. developmental trajectories) for two groups of children that differ along a potentially important independent variable (e.g. age at intervention). This method was used to compare language development and speech perception outcomes in children who received cochlear implants in the second, third or fourth year of life. Within this range of age at implantation, it was found that implantation before the age of 2 resulted in speech perception and language advantages that were significant both from a statistical and a practical point of view. Additionally, the present results are consistent with the existence of a 'sensitive period' for language development, a gradual decline in language acquisition skills as a function of age.

  11. Cochlear Implantation in Inner Ear Malformations: Systematic Review of Speech Perception Outcomes and Intraoperative Findings.

    Science.gov (United States)

    Farhood, Zachary; Nguyen, Shaun A; Miller, Stephen C; Holcomb, Meredith A; Meyer, Ted A; Rizk, And Habib G

    2017-03-01

    Objective (1) To analyze reported speech perception outcomes in patients with inner ear malformations who undergo cochlear implantation, (2) to review the surgical complications and findings, and (3) to compare the 2 classification systems of Jackler and Sennaroglu. Data Sources PubMed, Scopus (including Embase), Medline, and CINAHL Plus. Review Methods Fifty-nine articles were included that contained speech perception and/or intraoperative data. Cases were differentiated depending on whether the Jackler or Sennaroglu malformation classification was used. A meta-analysis of proportions examined incidences of complete insertion, gusher, and facial nerve aberrancy. For speech perception data, weighted means and standard deviations were calculated for all malformations for short-, medium-, and long-term follow-up. Speech tests were grouped into 3 categories-closed-set words, open-set words, and open-set sentences-and then compared through a comparison-of-means t test. Results Complete insertion was seen in 81.8% of all inner ear malformations (95% CI: 72.6-89.5); gusher was reported in 39.1% of cases (95% CI: 30.3-48.2); and facial nerve anomalies were encountered in 34.4% (95% CI: 20.1-50.3). Significant improvements in average performance were seen for closed- and open-set tests across all malformation types at 12 months postoperatively. Conclusions Cochlear implantation outcomes are favorable for those with inner ear malformations from a surgical and speech outcome standpoint. Accurate classification of anatomic malformations, as well as standardization of postimplantation speech outcomes, is necessary to improve understanding of the impact of implantation in this difficult patient population.

  12. Parenting stress in parents of children with cochlear implants: relationships among parent stress, child language, and unilateral versus bilateral implants.

    Science.gov (United States)

    Sarant, Julia; Garrard, Philippa

    2014-01-01

    Little attention has been focused on stress levels of parents of children with cochlear implants (CIs). This study examined the stress experience of 70 parents of children with CIs by comparing stress levels in this group of parents to those in parents of children without disabilities, identifying primary stressors, examining the relationship between parent stress and child language, and comparing stress in parents of children with bilateral and unilateral CIs. Parents completed a parent stress questionnaire, and the receptive vocabulary and language abilities of the children were evaluated. Results indicated that these parents had a higher incidence of stress than the normative population. Parent stress levels and child language outcomes were negatively correlated. Child behavior and lack of spousal and social support were the prime causes of parent stress. Parents of children with bilateral CIs were significantly less stressed than were parents of children with unilateral CIs.

  13. Melodic Contour Training and Its Effect on Speech in Noise, Consonant Discrimination, and Prosody Perception for Cochlear Implant Recipients

    Directory of Open Access Journals (Sweden)

    Chi Yhun Lo

    2015-01-01

    Full Text Available Cochlear implant (CI recipients generally have good perception of speech in quiet environments but difficulty perceiving speech in noisy conditions, reduced sensitivity to speech prosody, and difficulty appreciating music. Auditory training has been proposed as a method of improving speech perception for CI recipients, and recent efforts have focussed on the potential benefits of music-based training. This study evaluated two melodic contour training programs and their relative efficacy as measured on a number of speech perception tasks. These melodic contours were simple 5-note sequences formed into 9 contour patterns, such as “rising” or “rising-falling.” One training program controlled difficulty by manipulating interval sizes, the other by note durations. Sixteen adult CI recipients (aged 26–86 years and twelve normal hearing (NH adult listeners (aged 21–42 years were tested on a speech perception battery at baseline and then after 6 weeks of melodic contour training. Results indicated that there were some benefits for speech perception tasks for CI recipients after melodic contour training. Specifically, consonant perception in quiet and question/statement prosody was improved. In comparison, NH listeners performed at ceiling for these tasks. There was no significant difference between the posttraining results for either training program, suggesting that both conferred benefits for training CI recipients to better perceive speech.

  14. Insertion trauma of a cochlear implant electrode array with Nitinol inlay.

    Science.gov (United States)

    Rau, Thomas S; Harbach, Lenka; Pawsey, Nick; Kluge, Marcel; Erfurt, Peter; Lenarz, Thomas; Majdani, Omid

    2016-11-01

    The integration of a shape memory actuator is a potential mechanism to achieve a consistent perimodiolar position after electrode insertion during cochlear implant surgery. After warming up, and therefore activation of the shape memory effect, the electrode array will change from a straight configuration into a spiral shaped one leading to a final position close to the modiolus. The aim of this study was to investigate whether the integration of an additional thin wire (referred to as an "inlay") made of Nitinol, a well-established shape memory alloy, in a conventional hearing preservation electrode array will affect the insertion behaviour in terms of increased risk of insertion trauma. Six conventional Hybrid-L electrode arrays (Cochlear Ltd., Sydney, Australia) were modified to incorporate a wire inlay made of Nitinol. The diameter of the wires was 100 µm with a tapered tip region. Electrodes were inserted into human temporal bone specimens using a standard surgical approach. After insertion and embedding in epoxy resin, histological sections were prepared to evaluate insertion trauma. Insertion was straightforward and no difficulties were observed. The addition of a shape memory wire, thin but also strong enough to curl the electrode array, does not result in histologically detectable insertion trauma. Atraumatic insertion seems possible.

  15. Design and implementation of a DSP with multi-level low power strategies for cochlear implants

    Institute of Scientific and Technical Information of China (English)

    Mai Songping; Zhang Chun; Chao Jun; Wang Zhihua

    2009-01-01

    This paper presents the design and implementation of a low power digital signal processor (THUCIDSP-1) targeting at application for cochlear implants. Multi-level low power strategies including algorithm optimization, operand isolation, clock gating and memory partitioning are adopted in the processor design to reduce the power consumption. Experimental results show that the complexity of the Continuous Interleaved Sampling (CIS) algorithm is reduced by more than 80% and the power dissipation of the hardware alone is reduced by about 25% with the low power methods. The THUCIDSP-1 prototype, fabricated in 0.18-μm standard CMOS process, consumes only 1.91 mW when executing the CIS algorithm at 3 MHz.

  16. Cognitive development, reading and prosodic skills in children with cochlear implants.

    Science.gov (United States)

    Lyxell, Björn; Wass, Malin; Sahlén, Birgitta; Samuelsson, Christina; Asker-Arnason, Lena; Ibertsson, Tina; Mäki-Torkko, Elina; Larsby, Birgitta; Hällgren, Mathias

    2009-10-01

    This report summarizes some of the results of studies in our laboratory exploring the development of cognitive, reading and prosodic skills in children with cochlear implantation (CI). The children with CI performed at significantly lower levels than the hearing comparison group on the majority of cognitive tests, despite showing levels of nonverbal ability. The differences between children with CI and hearing children were most pronounced on tasks with relatively high phonological processing demands, but they were not limited to phonological processing. Impairment of receptive and productive prosody was also evident in children with CI. Despite these difficulties, 75% of the children with CI reached a level of reading skill comparable to that of hearing children. The results are discussed with respect to compensation strategies in reading.

  17. Comparison of music perception in bilateral and unilateral cochlear implant users and normal-hearing subjects.

    Science.gov (United States)

    Veekmans, K; Ressel, L; Mueller, J; Vischer, M; Brockmeier, S J

    2009-01-01

    Music plays an important role in the daily life of cochlear implant (CI) users, but electrical hearing and speech processing pose challenges for enjoying music. Studies of unilateral CI (UCI) users' music perception have found that these subjects have little difficulty recognizing tempo and rhythm but great difficulty with pitch, interval and melody. The present study is an initial step towards understanding music perception in bilateral CI (BCI) users. The Munich Music Questionnaire was used to investigate music listening habits and enjoyment in 23 BCI users compared to 2 control groups: 23 UCI users and 23 normal-hearing (NH) listeners. Bilateral users appeared to have a number of advantages over unilateral users, though their enjoyment of music did not reach the level of NH listeners.

  18. Cognitive development in children with cochlear implants: relations to reading and communication.

    Science.gov (United States)

    Lyxell, Björn; Sahlén, Birgitta; Wass, Malin; Ibertsson, Tina; Larsby, Birgitta; Hällgren, Mathias; Mäki-Torkko, Elina

    2008-11-01

    The purpose of the present article is to present an overview of a set of studies conducted in our own laboratory on cognitive and communicative development in children with cochlear implants (CI). The results demonstrate that children with CIs perform at significantly lower levels on the majority of the cognitive tasks. The exceptions to this trend are tasks with relatively lower demands on phonological processing. A fairly high proportion of the children can reach a level of reading comprehension that matches hearing children, despite the fact that they have relatively poor phonological skills. General working memory capacity is further correlated with the type of questions asked in a referential communication task. The results are discussed with respect to issues related to education and rehabilitation.

  19. Imitation of nonwords by hearing impaired children with cochlear implants: suprasegmental analyses.

    Science.gov (United States)

    Carter, Allyson K; Dillon, Caitlin M; Pisoni, David B

    2002-12-01

    In this study, we examined two prosodic characteristics of speech production in 8-10-year-old experienced cochlear implant (CI) users who completed a nonword repetition task. We looked at how often they correctly reproduced syllable number and primary stress location in their responses. Although only 5% of all nonword imitations were produced correctly without errors, 64% of the imitations contained the correct syllable number and 61% had the correct placement of primary stress. Moreover, these target prosodic properties were correctly preserved significantly more often for targets with fewer syllables and targets with primary stress on the initial syllable. Syllable and stress scores were significantly correlated with measures of speech perception, intelligibility, perceived accuracy, and working memory. These findings suggest that paediatric CI users encode the overall prosodic envelope of nonword patterns, despite the loss of more detailed segmental properties. This phonological knowledge is also reflected in other language and memory skills.

  20. Cochlear gene therapy with ancestral AAV in adult mice: complete transduction of inner hair cells without cochlear dysfunction

    Science.gov (United States)

    Suzuki, Jun; Hashimoto, Ken; Xiao, Ru; Vandenberghe, Luk H.; Liberman, M. Charles

    2017-01-01

    The use of viral vectors for inner ear gene therapy is receiving increased attention for treatment of genetic hearing disorders. Most animal studies to date have injected viral suspensions into neonatal ears, via the round window membrane. Achieving transduction of hair cells, or sensory neurons, throughout the cochlea has proven difficult, and no studies have been able to efficiently transduce sensory cells in adult ears while maintaining normal cochlear function. Here, we show, for the first time, successful transduction of all inner hair cells and the majority of outer hair cells in an adult cochlea via virus injection into the posterior semicircular canal. We used a “designer” AAV, AAV2/Anc80L65, in which the main capsid proteins approximate the ancestral sequence state of AAV1, 2, 8, and 9. Our injections also transduced ~10% of spiral ganglion cells and a much larger fraction of their satellite cells. In the vestibular sensory epithelia, the virus transduced large numbers of hair cells and virtually all the supporting cells, along with close to half of the vestibular ganglion cells. We conclude that this viral vector and this delivery route hold great promise for gene therapy applications in both cochlear and vestibular sense organs. PMID:28367981

  1. Design of a radio-linked implantable cochlear prosthesis using surface acoustic wave devices.

    Science.gov (United States)

    Jeutter, D C; Josse, F

    1993-01-01

    Cochlear prosthesis systems for postlingually deaf individuals (those who have become deaf due to disease or injury after having developed mature speech capability) are considered. These systems require the surgical implantation of an array of electrodes within the cochlea and are driven by processed sound signals from outside the body. A system that uses an analog signal approach for transcutaneous transfer of six processed speech data channels using frequency multiplexing is described. The system utilizes a filterbank of six narrowband surface acoustic wave (SAW) filters in the range 72-78 MHz with a 1.2-MHz channel spacing to multiplex the six carrier signals, frequency modulated, by the processed speech signals, onto a composite signal. The same SAW filters are used in the receiver filterbank for signal separation, but are housed in a miniaturized package. The system includes a portable transmitter and a receiver package which is to be implanted in the patient. The implanted circuits are supplied exclusively from power transferred from outside the body via a separate 10-MHz transcutaneous link.

  2. Written Language Ability in Mandarin-Speaking Children with Cochlear Implants

    Directory of Open Access Journals (Sweden)

    Che-Ming Wu

    2015-01-01

    Full Text Available Objectives. To examine narrative writing in cochlear implant (CI children and understand the factors associated with unfavorable outcomes. Materials and Methods. Forty-five CI children in grades 2–6 participated in this study. They received CIs at 4.1 ± 2.1 years of age and had used them for 6.5 ± 2.7 years. A story-writing test was conducted and scored on 4 subscales: Total Number of Words, Words per Sentence, Morphosyntax, and Semantics. Scores more than 1.5 SD lower than the mean of the normal-hearing normative sample were considered problematic. Language and speech skills were examined. Results. Significantly more implanted students were problematic on “Total Number of Words” (p<0.001, “Words per Sentence” (p=0.049, and “Semantics” (p<0.001. Poorer receptive language and auditory performance were independently associated with problematic “Total Number of Words” (R2=0.489 and “Semantics” (R2=0.213, respectively. “Semantics” problem was more common in lower graders (grades 2–4 than in higher graders (grades 5-6; p=0.016. Conclusion. Implanted children tend to write stories that are shorter, worse-organized, and without a plot, while formulating morphosyntactically correct sentences. Special attention is required on their auditory and language performances, which could lead to written language problems.

  3. Parents of deaf children with cochlear implants: a study of technology and community.

    Science.gov (United States)

    Mauldin, Laura

    2012-05-01

    The cochlear implant (CI) is increasingly used to treat deafness, despite arguments from the deaf community. Deaf children born to hearing parents are the fastest growing group of CI recipients, making parents the primary consumers. Instead of focusing on the controversy over implants, this article examines the clinical structures shaping parental decision-making and how parents integrate clinical practices into family and community. Observations and in-depth interviews were conducted in a CI clinic and at various community sites. The data reveal strong inter-institutional co-operations between the clinic, the state and local school districts. Working together, these institutions anticipate parental needs, foster a CI community and thus increase compliance. I conclude that implantation is an ongoing practice enculturating parents into a new community characterised by the adoption of long-term rehabilitative duties. However, the long-term nature of rehabilitation creates disparities in outcomes, which would be better understood through further research on the social relations in families and across parent networks in the CI community.

  4. Auditory and oral language abilities in children with cochlear implants: a case study.

    Science.gov (United States)

    Melo, Tatiana Mendes de; Lara, Jessica Domingues

    2012-01-01

    The cochlear implant (CI) represents the most important advance in the treatment of individuals with severe to profound bilateral hearing loss who do not benefit from hearing aids. Children who receive the CI during the critical period of neuroplasticity of the auditory system, when combined with speech therapy, have the chance to develop the auditory and linguistic skills similarly to their normal hearing peers. Two cases of implanted children are presented in this study, and one of them was not enrolled in a formal aurioral therapeutic program since the implantation surgery. At the moment of language and auditory assessment, the children were 2 years and 5 months old, and the CI had been used for 11 months. According to the results presented, it was observed that the child enrolled in rehabilitation program had better auditory and language performance when compared to the other child. Despite the remarkable benefits that the CI provides to children with hearing impairment, the device itself only provides the child with the audibility of environmental sounds and speech signal. For the auditory and language development to happen, it is necessary, among other factors, a speech-language intervention, with partnership between professionals and parents.

  5. Auditory and Visual Electrophysiology of Deaf Children with Cochlear Implants: Implications for Cross-modal Plasticity.

    Science.gov (United States)

    Corina, David P; Blau, Shane; LaMarr, Todd; Lawyer, Laurel A; Coffey-Corina, Sharon

    2017-01-01

    Deaf children who receive a cochlear implant early in life and engage in intensive oral/aural therapy often make great strides in spoken language acquisition. However, despite clinicians' best efforts, there is a great deal of variability in language outcomes. One concern is that cortical regions which normally support auditory processing may become reorganized for visual function, leaving fewer available resources for auditory language acquisition. The conditions under which these changes occur are not well understood, but we may begin investigating this phenomenon by looking for interactions between auditory and visual evoked cortical potentials in deaf children. If children with abnormal auditory responses show increased sensitivity to visual stimuli, this may indicate the presence of maladaptive cortical plasticity. We recorded evoked potentials, using both auditory and visual paradigms, from 25 typical hearing children and 26 deaf children (ages 2-8 years) with cochlear implants. An auditory oddball paradigm was used (85% /ba/ syllables vs. 15% frequency modulated tone sweeps) to elicit an auditory P1 component. Visual evoked potentials (VEPs) were recorded during presentation of an intermittent peripheral radial checkerboard while children watched a silent cartoon, eliciting a P1-N1 response. We observed reduced auditory P1 amplitudes and a lack of latency shift associated with normative aging in our deaf sample. We also observed shorter latencies in N1 VEPs to visual stimulus offset in deaf participants. While these data demonstrate cortical changes associated with auditory deprivation, we did not find evidence for a relationship between cortical auditory evoked potentials and the VEPs. This is consistent with descriptions of intra-modal plasticity within visual systems of deaf children, but do not provide evidence for cross-modal plasticity. In addition, we note that sign language experience had no effect on deaf children's early auditory and visual ERP

  6. Relationship between Intelligence Quotient and Musical Ability in Children with Cochlear Implantation

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    Soleimanifar, Simin; Jafari, Zahra; Motasaddi Zarandy, Masoud; Asadi, Houman; Haghani, Hamid

    2016-01-01

    Introduction: Children with cochlear implants (CIs) may experience few opportunities for positive musical experiences, and musical perception is therefore often not sufficiently developed. This paper investigates and discusses the relationship between intelligence quotient (IQ) and musical ability in children with CIs compared with children with normal hearing. Materials and Methods: This was a comparative analytical study conducted in 48 children with unilateral CI and 48 normal-hearing children, 6–8 years of age, with ‘normal’ IQ and no formal music training. The average IQ score in the experimental and control groups were 105.41 and 106.31, respectively. No statistically significant differences were detected between Raven’s IQ scores in both groups. Data were collected by administering Raven's Colored Progressive Matrices IQ Tests and the Montreal Battery of Evaluation of Musical Abilities (MBEMA) Test, consisting of scale, contour, interval, rhythm, and memory sections. Results: Mean total MBEMA score in the experimental and control groups was 58.93 and 72.16 (out of 100), respectively. Significant differences were evident between scores of children with CIs in comparison with their normal-hearing peers (P≤0.001). A remarkable direct correlation between IQ and musical scores in both the control (r≥0.38) and experimental (r≥0.37) groups was observed. Conclusion: IQ has a noticeable effect on music processing and facilitates the perception of various musical elements. With regard to the mutual relationship between IQ and musical skills, this study illustrates the advantage of determining music perception scores and highlights the importance of appropriate musical intervention in order to enhance auditory neural plasticity, especially in children with cochlear implantation. PMID:27738611

  7. Cochlear implantation in children with "CHARGE syndrome": surgical options and outcomes.

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    Ricci, Giampietro; Trabalzini, Franco; Faralli, Mario; D'Ascanio, Luca; Cristi, Cristina; Molini, Egisto

    2014-03-01

    CHARGE syndrome is a rare, polymalformative disease, representing one of the major causes of associated blindness and deafness. Bilateral, severe-profound, sensorineural hearing loss is common in CHARGE children. Aim of this study is to present our results in children with "CHARGE syndrome" submitted to cochlear implantation (CI). The frequency of anatomic anomalies, possible variations in the surgical technique of CI, and the audiological/rehabilitative benefits attained in our patients are reported. we submitted 5 children affected by CHARGE syndrome with profound, bilateral, sensorineural hearing loss to CI. Otoacoustic emissions, auditory brainstem response, acoustic impedance testing, cranial computed tomography and magnetic resonance were carried out preoperatively in all children. CI was performed using the mastoidotomy-posterior tympanotomy approach in two cases, and the suprameatal approach in three children. Infant toddler-meaningful auditory integration scale was used to evaluate kid's audiological performance before and after CI. Intra-operatory findings and postsurgical complications were evaluated. Among our patients, intraoperative anatomical malformations were cochlear hypoplasia (100 %), ossicles malformations (100 %), semicircular canals aplasia (100 %), oval window atresia (60 %), round window atresia (40 %), widening of the aqueduct of the vestibule (20 %), and aberrant course of the facial nerve (20 %). No intra- or postoperative complication was recorded in relation to implant positioning. After a follow-up ranging from 1 to 4.5 years, only 2/5 patients used oral language as the sole mean of communication, 1 started utilizing oral language as the main mean of communication, while 2 patients did not develop any linguistic ability. In conclusion, CI in patients with CHARGE association is feasible and, despite results variability, it should be carried out in CHARGE children with severe hearing loss as soon as possible. Although the selection of a

  8. Residual Hearing Preservation with the Evo® Cochlear Implant Electrode Array: Preliminary Results.

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    Bento, Ricardo Ferreira; Danieli, Fabiana; Magalhães, Ana Tereza de Matos; Gnansia, Dan; Hoen, Michel

    2016-10-01

    Introduction The preservation of residual hearing is currently an important challenge for cochlear implant surgeries. Indeed, if patients exhibit functional hearing after cochlear implantation, they can benefit from the combination of acoustical stimulation, usually in the low-frequencies and electrical stimulation in the high-frequencies. This combined mode of stimulation has proven to be beneficial both in terms of speech perception and of sound quality. Finding the right procedures for conducting soft-surgeries and designing electrode arrays dedicated to hearing preservation is an open issue. Objective The objective of this study is to evaluate the combination of a soft-surgery procedure implicating round-window insertion and the use of dexamethasone and hyaluronic acid during surgery, with the use of a specifically designed straight soft electrode array, on hearing preservation in patients with functional hearing in the low frequencies. Methods This pre-clinical trial was conducted on seven patients with residual hearing in the low frequencies. The surgical method used employed a round window insertion and the use of topical dexamethasone. Results The soft-surgery protocol could be successfully followed in five patients. In this group, the average hearing threshold shift compared with pre-operative values was of 18.7 +/- 16.1 dB HL up to 500 Hz and 15.7 +/- 15.1 up to 1 kHz, demonstrating satisfying levels of hearing preservation. Conclusion We were able to demonstrate the possibility of preserving residual hearing in most of the patients using the EVO electrode. Significant residual hearing preservation levels were was obtained when a soft surgical approach involving round window insertion, dexamethasone and hyaluronic use during the surgery.

  9. Auditory and Visual Electrophysiology of Deaf Children with Cochlear Implants: Implications for Cross-modal Plasticity

    Science.gov (United States)

    Corina, David P.; Blau, Shane; LaMarr, Todd; Lawyer, Laurel A.; Coffey-Corina, Sharon

    2017-01-01

    Deaf children who receive a cochlear implant early in life and engage in intensive oral/aural therapy often make great strides in spoken language acquisition. However, despite clinicians’ best efforts, there is a great deal of variability in language outcomes. One concern is that cortical regions which normally support auditory processing may become reorganized for visual function, leaving fewer available resources for auditory language acquisition. The conditions under which these changes occur are not well understood, but we may begin investigating this phenomenon by looking for interactions between auditory and visual evoked cortical potentials in deaf children. If children with abnormal auditory responses show increased sensitivity to visual stimuli, this may indicate the presence of maladaptive cortical plasticity. We recorded evoked potentials, using both auditory and visual paradigms, from 25 typical hearing children and 26 deaf children (ages 2–8 years) with cochlear implants. An auditory oddball paradigm was used (85% /ba/ syllables vs. 15% frequency modulated tone sweeps) to elicit an auditory P1 component. Visual evoked potentials (VEPs) were recorded during presentation of an intermittent peripheral radial checkerboard while children watched a silent cartoon, eliciting a P1–N1 response. We observed reduced auditory P1 amplitudes and a lack of latency shift associated with normative aging in our deaf sample. We also observed shorter latencies in N1 VEPs to visual stimulus offset in deaf participants. While these data demonstrate cortical changes associated with auditory deprivation, we did not find evidence for a relationship between cortical auditory evoked potentials and the VEPs. This is consistent with descriptions of intra-modal plasticity within visual systems of deaf children, but do not provide evidence for cross-modal plasticity. In addition, we note that sign language experience had no effect on deaf children’s early auditory and visual

  10. Semitone frequency mapping to improve music representation for nucleus cochlear implants

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    Omran Sherif

    2011-01-01

    Full Text Available Abstract The frequency-to-channel mapping for Cochlear implant (CI signal processors was originally designed to optimize speech perception and generally does not preserve the harmonic structure of music sounds. An algorithm aimed at restoring the harmonic relationship of frequency components based on semitone mapping is presented in this article. Two semitone (Smt based mappings in different frequency ranges were investigated. The first, Smt-LF, covers a range from 130 to 1502 Hz which encompasses the fundamental frequency of most musical instruments. The second, Smt-MF, covers a range from 440 to 5040 Hz, allocating frequency bands of sounds close to their characteristic tonotopical sites according to Greenwood's function. Smt-LF, in contrast, transposes the input frequencies onto locations with higher characteristic frequencies. A sequence of 36 synthetic complex tones (C3 to B5, each consisting of a fundamental and 4 harmonic overtones, was processed using the standard (Std, Smt-LF and Smt-MF mappings. The analysis of output signals showed that the harmonic structure between overtones of all complex tones was preserved using Smt mapping. Semitone mapping preserves the harmonic structure and may in turn improve music representation for Nucleus cochlear implants. The proposed semitone mappings incorporate the use of virtual channels to allow frequencies spanning three and a half octaves to be mapped to 43 stimulation channels. A pitch difference limen test was done with normal hearing subjects discriminating pairs of pure tones with different semitone intervals which were processed by a vocoder type simulator of CI sound processing. The results showed better performance with wider semitone intervals. However, no significant difference was found between 22 and 43 channels maps.

  11. Parental Expectation from Children with Cochlear Implants in Indian Context: a Questionnaire Based Study

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    Kumar, Prawin; Sanju, Himanshu Kumar; Mishra, Rajkishor; Singh, Varun; Mohan, Priyanka

    2016-01-01

    Introduction Parental support is important in the habilitation/rehabilitation of children using cochlear implant devices. Hence, it is important for families to know the realistic expectations regarding outcomes from CIs. Objective The objective of the present study is to know the parents' expectation from children using CIs. Methods For this study, we recruited 23 parents of children using CIs. We administered 15 questions translated in to Hindi related to communication abilities, social skills, academic achievement, change in future life, rehabilitation demand, and stress due to hearing impairment. Results The response of the questions (5-point rating scale) related to communication abilities showed that parents were expecting children using CIs to use the telephone (95%), to be able to detect soft sounds (99%), to listen in crowds (86%), to be able to easily understand others (76%), and to show improvement in communication skills (78%). Similarly, for questions related to social skills showed 90% of the parents expecting that their children with CIs should be able to easily make friends with normal hearing peers, and 80% of the parents were expecting the children to achieve high standards in their reading and writing skills. Questions related to change in future life showed 86% of the parents expecting their children with CIs to act like normal hearing children. Further, 78% parents showed positive response regarding importance of intensive training. However, 70% of the parents reported stress in the family due to the existence of the hearing impaired child. Conclusion Overall, the existing questionnaire-based study showed that parents have high expectations from their children with cochlear implant.

  12. Permanent and transient effects of locally delivered n-acetyl cysteine in a guinea pig model of cochlear implantation.

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    Eastwood, Hayden; Pinder, Darren; James, David; Chang, Andrew; Galloway, Stuart; Richardson, Rachael; O'Leary, Stephen

    2010-01-01

    Protection of residual hearing after cochlear implant surgery can improve the speech and music perception of cochlear implant recipients, particularly in the presence of background noise. Surgical trauma and chronic inflammation are thought to be responsible for a significant proportion of residual hearing loss after surgery. Local delivery of the anti-oxidant precursor n-acetyl cysteine (NAC) to the cochlea via round window 30min prior to surgery, increased the level of residual hearing at 24-32kHz 4weeks post surgery compared to controls. The hearing protection was found in the basal turn near the site of implantation. Coincidentally, the basal turn was also the location that sustained the greatest hearing loss. As well as protecting residual hearing, NAC-treated animals demonstrated a reduction in the chronic inflammatory changes associated with implantation. While these findings indicate that anti-oxidant therapy can be used to reduce the hearing loss associated with surgical trauma, the local delivery of NAC was associated with a transient increase in hearing thresholds, and osseoneogenesis was seen in a greater number of NAC-treated animals. These side-effects would limit its clinical use through local cochlear administration. However, it is not known yet whether these effects would also be produced by other anti-oxidants, or ameliorated by using a different route of administration.

  13. Hearing versus Listening: Attention to Speech and Its Role in Language Acquisition in Deaf Infants with Cochlear Implants

    Science.gov (United States)

    Houston, Derek M.; Bergeson, Tonya R.

    2013-01-01

    The advent of cochlear implantation has provided thousands of deaf infants and children access to speech and the opportunity to learn spoken language. Whether or not deaf infants successfully learn spoken language after implantation may depend in part on the extent to which they listen to speech rather than just hear it. We explore this question by examining the role that attention to speech plays in early language development according to a prominent model of infant speech perception – Jusczyk’s WRAPSA model – and by reviewing the kinds of speech input that maintains normal-hearing infants’ attention. We then review recent findings suggesting that cochlear-implanted infants’ attention to speech is reduced compared to normal-hearing infants and that speech input to these infants differs from input to infants with normal hearing. Finally, we discuss possible roles attention to speech may play on deaf children’s language acquisition after cochlear implantation in light of these findings and predictions from Jusczyk’s WRAPSA model. PMID:24729634

  14. An Examination of Sources of Variability Across the Consonant-Nucleus-Consonant Test in Cochlear Implant Listeners

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    Julie Arenberg Bierer

    2016-04-01

    Full Text Available The 10 consonant-nucleus-consonant (CNC word lists are considered the gold standard in the testing of cochlear implant (CI users. However, variance in scores across lists could degrade the sensitivity and reliability of them to identify deficits in speech perception. This study examined the relationship between variability in performance among lists and the lexical characteristics of the words. Data are from 28 adult CI users. Each subject was tested on all 10 CNC word lists. Data were analyzed in terms of lexical characteristics, lexical frequency, neighborhood density, bi-, and tri-phonemic probabilities. To determine whether individual performance variability across lists can be reduced, the standard set of 10 phonetically balanced 50-word lists was redistributed into a new set of lists using two sampling strategies: (a balancing with respect to word lexical frequency or (b selecting words with equal probability. The mean performance on the CNC lists varied from 53.1% to 62.4% correct. The average difference between the highest and lowest scores within individuals across the lists was 20.9% (from 12% to 28%. Lexical frequency and bi-phonemic probabilities were correlated with word recognition performance. The range of scores was not significantly reduced for all individuals when responses were simulated with 1,000 sets of redistributed lists, using both types of sampling methods. These results indicate that resampling of words does not affect the test–retest reliability and diagnostic value of the CNC word test.

  15. Internet video telephony allows speech reading by deaf individuals and improves speech perception by cochlear implant users.

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    Georgios Mantokoudis

    Full Text Available OBJECTIVE: To analyze speech reading through Internet video calls by profoundly hearing-impaired individuals and cochlear implant (CI users. METHODS: Speech reading skills of 14 deaf adults and 21 CI users were assessed using the Hochmair Schulz Moser (HSM sentence test. We presented video simulations using different video resolutions (1280 × 720, 640 × 480, 320 × 240, 160 × 120 px, frame rates (30, 20, 10, 7, 5 frames per second (fps, speech velocities (three different speakers, webcameras (Logitech Pro9000, C600 and C500 and image/sound delays (0-500 ms. All video simulations were presented with and without sound and in two screen sizes. Additionally, scores for live Skype™ video connection and live face-to-face communication were assessed. RESULTS: Higher frame rate (>7 fps, higher camera resolution (>640 × 480 px and shorter picture/sound delay (<100 ms were associated with increased speech perception scores. Scores were strongly dependent on the speaker but were not influenced by physical properties of the camera optics or the full screen mode. There is a significant median gain of +8.5%pts (p = 0.009 in speech perception for all 21 CI-users if visual cues are additionally shown. CI users with poor open set speech perception scores (n = 11 showed the greatest benefit under combined audio-visual presentation (median speech perception +11.8%pts, p = 0.032. CONCLUSION: Webcameras have the potential to improve telecommunication of hearing-impaired individuals.

  16. Beginning to communicate after cochlear implantation: oral language development in a young child.

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    Ertmer, David J; Strong, Lynette M; Sadagopan, Neeraja

    2003-04-01

    This longitudinal case study examined the emergence of a wide range of oral language skills in a deaf child whose cochlear implant was activated at 20 months. The main purposes of this study were to determine "Hannah's" rate of spoken language development during her second to fourth year of implant experience and to estimate the efficiency of her progress by comparing her performance to that of typically developing children. Mother-child interactions were also examined to determine changes in Hannah's communication competence. Normal or above-normal rates of development were observed in the following areas: (a) decreased production of nonwords, (b) increased receptive vocabulary, (c) type-token ratio, (d) regular use of word combinations, and (e) comprehension of phrases. Below-normal rates of development were observed in the following areas: (a) speech intelligibility, (b) number of word types and tokens, and (c) mean length of utterance in morphemes. Analysis of parent-child interactions showed a large increase in responses to questions during the third year of implant use. Data from Hannah's first post-implantation year (D. J. Ertmer & J. A. Mellon, 2001) indicated that some early language milestones were attained quite rapidly (e.g., canonical vocalizations and emergence of first word combinations). In contrast, the current study revealed that progress had slowed for related, but more advanced skills (e.g., production of intelligible speech and consistent use of word combinations). These changes in rate of development suggest that any advantages for language learning due to Hannah's advanced maturity (or other unknown factors) decreased with time and increasing linguistic complexity.

  17. A função vestibular em indivíduos usuários de implante coclear Vestibular function in cochlear implant users

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    Ariane Solci Bonucci

    2008-04-01

    Full Text Available A ocorrência de alteração no equilíbrio no período pós-cirúrgico ao implante coclear varia de 31 a 75%. OBJETIVO: Analisar a função vestibular no período pré e pós-operatório da cirurgia de implante coclear. MATERIAL E MÉTODO: Avaliou-se a função vestibular, por meio da vectoeletronistagmografia, de 38 pacientes, no pré e pós-cirúrgico de implante coclear. RESULTADOS: A principal queixa de desequilíbrio apresentada pelos pacientes foi a tontura, seguida pela vertigem postural e pela vertigem não-postural. Dos 38 pacientes avaliados, 13% deixaram de apresentar desequilíbrio após a cirurgia de implante coclear e apenas 5% referiram piora. Houve uma melhora na sintomatologia vestibular em 13% dos pacientes, sendo que esta possibilidade pode estar relacionada ao fenômeno de compensação vestibular e pela estimulação elétrica. Entretanto, foi observada na prova calórica uma piora na funcionalidade do sistema vestibular, tanto na orelha implantada como na orelha não-implantada. Assim, não há tendência de maior comprometimento na orelha implantada. CONCLUSÃO: O estudo demonstrou que o implante coclear pode comprometer o sistema vestibular em ambas as orelhas. Entretanto, a sintomatologia vestibular ocorre em menor proporção, podendo haver melhora no desequilíbrio após a cirurgia do implante coclear.Balance alterations in the postoperative of cochlear implant surgeries varies from 31 to 75%. AIM: to analyze vestibular function in the pre and postoperative periods of cochlear implanted individuals. MATERIALS AND METHODS: the vestibular function was assessed, through electronystagmography, in 38 patients, in the pre and postoperative of cochlear implant procedures. RESULTS: The main complaint of unbalance reported by patients was dizziness, followed by postural vertigo and non-postural vertigo. Results: 13% of the patients did not show any balance disorder following cochlear implant surgery and just 5% showed symptoms

  18. Contribution of a Contralateral Hearing Aid to Perception of Consonant Voicing, Intonation, and Emotional State in Adult Cochlear Implantees

    Science.gov (United States)

    Most, Tova; Gaon-Sivan, Gal; Shpak, Talma; Luntz, Michal

    2012-01-01

    Binaural hearing in cochlear implant (CI) users can be achieved either by bilateral implantation or bimodally with a contralateral hearing aid (HA). Binaural-bimodal hearing has the advantage of complementing the high-frequency electric information from the CI by low-frequency acoustic information from the HA. We examined the contribution of a…

  19. Mitochondrial Sensorineural Hearing Loss: A Retrospective Study and a Description of Cochlear Implantation in a MELAS Patient

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    Mauro Scarpelli

    2012-01-01

    Full Text Available Hearing impairment is common in patients with mitochondrial disorders, affecting over half of all cases at some time in the course of the disease. In some patients, deafness is only part of a multisystem disorder. By contrast, there are also a number of “pure” mitochondrial deafness disorders, the most common probably being maternally inherited. We retrospectively analyzed the last 60 genetically confirmed mitochondrial disorders diagnosed in our Department: 28 had bilateral sensorineural hearing loss, whereas 32 didn't present ear's abnormalities, without difference about sex and age of onset between each single group of diseases. We reported also a case of MELAS patient with sensorineural hearing loss, in which cochlear implantation greatly contributed to the patient's quality of life. Our study suggests that sensorineural hearing loss is an important feature in mitochondrial disorders and indicated that cochlear implantation can be recommended for patients with MELAS syndrome and others mitochondrial disorders.

  20. Morpho-syntactic reading comprehension in children with early and late cochlear implants.

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    López-Higes, Ramón; Gallego, Carlos; Martín-Aragoneses, María Teresa; Melle, Natalia

    2015-04-01

    This study explores morpho-syntactic reading comprehension in 19 Spanish children who received a cochlear implant (CI) before 24 months of age (early CI [e-CI]) and 19 Spanish children who received a CI after 24 months (late CI [l-CI]). They all were in primary school and were compared to a hearing control (HC) group of 19 children. Tests of perceptual reasoning, working memory, receptive vocabulary, and morpho-syntactic comprehension were used in the assessment. It was observed that while children with l-CI showed a delay, those with e-CI reached a level close to that which was obtained by their control peers in morpho-syntactic comprehension. Thus, results confirm a positive effect of early implantation on morpho-syntactic reading comprehension. Inflectional morphology and simple sentence comprehension were noted to be better in the e-CI group than in the l-CI group. The most important factor in distinguishing between the HC and l-CI groups or the e-CI and l-CI groups was verbal inflectional morphology.