WorldWideScience

Sample records for affect shoulder muscle

  1. Does a SLAP lesion affect shoulder muscle recruitment as measured by EMG activity during a rugby tackle?

    Directory of Open Access Journals (Sweden)

    Herrington Lee C

    2010-02-01

    Full Text Available Abstract Background The study objective was to assess the influence of a SLAP lesion on onset of EMG activity in shoulder muscles during a front on rugby football tackle within professional rugby players. Methods Mixed cross-sectional study evaluating between and within group differences in EMG onset times. Testing was carried out within the physiotherapy department of a university sports medicine clinic. The test group consisted of 7 players with clinically diagnosed SLAP lesions, later verified on arthroscopy. The reference group consisted of 15 uninjured and full time professional rugby players from within the same playing squad. Controlled tackles were performed against a tackle dummy. Onset of EMG activity was assessed from surface EMG of Pectorialis Major, Biceps Brachii, Latissimus Dorsi, Serratus Anterior and Infraspinatus muscles relative to time of impact. Analysis of differences in activation timing between muscles and limbs (injured versus non-injured side and non injured side versus matched reference group. Results Serratus Anterior was activated prior to all other muscles in all (P = 0.001-0.03 subjects. In the SLAP injured shoulder Biceps was activated later than in the non-injured side. Onset times of all muscles of the non-injured shoulder in the injured player were consistently earlier compared with the reference group. Whereas, within the injured shoulder, all muscle activation timings were later than in the reference group. Conclusions This study shows that in shoulders with a SLAP lesion there is a trend towards delay in activation time of Biceps and other muscles with the exception of an associated earlier onset of activation of Serratus anterior, possibly due to a coping strategy to protect glenohumeral stability and thoraco-scapular stability. This trend was not statistically significant in all cases

  2. Comparison of Shoulder Muscles Activation for Shoulder Abduction between Forward Shoulder Posture and Asymptomatic Persons

    OpenAIRE

    Yoo, Won-gyu

    2013-01-01

    [Purpose] This study investigated the differences in shoulder muscles activities during shoulder abduction between a forward shoulder posture group and asymptomatic group. [Subjects] Seven males with forward shoulder posture (FHS) and seven asymptomatic males were recruited. [Methods] We measured the upper and middle trapezius (UT and MT), serratus anterior (SA), and clavicle portion of the pectoralis major (cPM) in the right side during shoulder abduction. [Results] The activities of the UT ...

  3. Atrophy of muscles surrounding the shoulder in hemiplegia. Analysis with MRI

    International Nuclear Information System (INIS)

    Decrease of range of motion and subluxation of shoulders are common secondary dysfunctions after the stroke. The purpose of this study is to evaluate the atrophy of muscles surrounding shoulders in hemiplegic patients and to delineate the correlations between those atrophies and shoulder functions. MRI studies were done on bilateral shoulders in 13 hemiplegic patients with shoulder pain. The cross sectional areas of muscles surrounding shoulder, i.e., subscapularis, supraspinatus, infraspinatus, teres minor and deltoid muscle were measured on those images obtained. The degree of atrophies were evaluated by dividing cross-sectional area of the muscle on affected shoulder by that of non-affected shoulder, that is muscle atrophy ratio [MAR], for each muscle in every case. Also, the range of movements [ROM], the degree of subluxation and muscle strength of shoulder flexion were evaluated. All muscle cross-sectional areas on the affected side were significantly smaller than those of muscles on the unaffected side (p<0.01). The means of MARs were 0.68, 0.69, 0.86, 0.72 and 0.69 for subscapularis, supraspinatus, infraspinatus, teres minor and deltoid muscle. The pattern of muscle atrophies, however, varies from case to case. Both correlations of ROM versus supraspinatus MAR and degree of shoulder subluxation versus deltoid MAR were statistically significant (p<0.05). These results indicate the contribution of muscle atrophy to the shoulder dysfunction in hemiplegic patients. (author)

  4. Prevalence and anatomical location of muscle tenderness in adults with nonspecific neck/shoulder pain

    DEFF Research Database (Denmark)

    Andersen, Lars L; Hansen, Klaus; Mortensen, Ole S; Zebis, Mette K

    2011-01-01

    Many adults experience bothersome neck/shoulder pain. While research and treatment strategies often focus on the upper trapezius, other neck/shoulder muscles may be affected as well. The aim of the present study is to evaluate the prevalence and anatomical location of muscle tenderness in adults...

  5. An MRI study on the relations between muscle atrophy, shoulder function and glenohumeral deformity in shoulders of children with obstetric brachial plexus injury

    Directory of Open Access Journals (Sweden)

    van Doorn-Loogman Mirjam H

    2009-05-01

    Full Text Available Abstract Background A substantial number of children with an obstetric brachial plexus lesion (OBPL will develop internal rotation adduction contractures of the shoulder, posterior humeral head subluxations and glenohumeral deformities. Their active shoulder function is generally limited and a recent study showed that their shoulder muscles were atrophic. This study focuses on the role of shoulder muscles in glenohumeral deformation and function. Methods This is a prospective study on 24 children with unilateral OBPL, who had internal rotation contractures of the shoulder (mean age 3.3 years, range 14.7 months to 7.3 years. Using MR imaging from both shoulders the following parameters were assessed: glenoid form, glenoscapular angle, subluxation of the humeral head, thickness and segmental volume of the subscapularis, infraspinatus and deltoid muscles. Shoulder function was assessed measuring passive external rotation of the shoulder and using the Mallet score for active function. Statistical tests used are t-tests, Spearman's rho, Pearsons r and logistic regression. Results The affected shoulders showed significantly reduced muscle sizes, increased glenoid retroversion and posterior subluxation. Mean muscle size compared to the normal side was: subscapularis 51%, infraspinatus 61% and deltoid 76%. Glenoid form was related to infraspinatus muscle atrophy. Subluxation was related to both infraspinatus and subscapularis atrophy. There was no relation between atrophy of muscles and passive external rotation. Muscle atrophy was not related to the Mallet score or its dimensions. Conclusion Muscle atrophy was more severe in the subscapularis muscle than in infraspinatus and deltoid. As the muscle ratios are not related to passive external rotation nor to active function of the shoulder, there must be other muscle properties influencing shoulder function.

  6. 3D Finite Element Models of Shoulder Muscles for Computing Lines of Actions and Moment Arms

    OpenAIRE

    Webb, Joshua D.; Blemker, Silvia S.; Delp, Scott L.

    2012-01-01

    Accurate representation of musculoskeletal geometry is needed to characterize the function of shoulder muscles. Previous models of shoulder muscles have represented muscle geometry as a collection of line segments, making it difficult to account the large attachment areas, muscle-muscle interactions, and complex muscle fiber trajectories typical of shoulder muscles. To better represent shoulder muscle geometry we developed three-dimensional finite element models of the deltoid and rotator cuf...

  7. Effect of the Push-up Plus (PUP) Exercise at Different Shoulder Rotation Angles on Shoulder Muscle Activities

    OpenAIRE

    Cho, Sung-Hak; Baek, Il-hun; Cheon, Ju Young; Cho, Min Jung; Choi, Mi Young; JUNG, DA HYE

    2014-01-01

    [Purpose] Although the Push-Up Plus is a useful exercise method for shoulder stabilization, few studies have examined its effects at different angles of shoulder rotation. Therefore, the present study investigated the most effective exercise method for shoulder stabilization by analyzing muscle activities of the rotator cuff muscles at different angles of shoulder rotation. [Subjects] Fifteen healthy university students in their 20s were the subjects of this study. [Methods] Changes in muscle...

  8. Patterns of Age-Associated Degeneration Differ in Shoulder Muscles

    Science.gov (United States)

    Raz, Yotam; Henseler, Jan F.; Kolk, Arjen; Riaz, Muhammad; van der Zwaal, Peer; Nagels, Jochem; Nelissen, Rob G. H. H.; Raz, Vered

    2015-01-01

    Shoulder complaints are common in the elderly and hamper daily functioning. These complaints are often caused by tears in the muscle-tendon units of the rotator cuff (RC). The four RC muscles stabilize the shoulder joint. While some RC muscles are frequently torn in shoulder complaints others remain intact. The pathological changes in RC muscles are poorly understood. We investigated changes in RC muscle pathology combining radiological and histological procedures. We measured cross sectional area (CSA) and fatty infiltration from Magnetic Resonance Imaging with Arthrography (MRA) in subjects without (N = 294) and with (N = 109) RC-tears. Normalized muscle CSA of the four RC muscles and the deltoid shoulder muscle were compared and age-associated patterns of muscle atrophy and fatty infiltration were constructed. We identified two distinct age-associated patterns: in the supraspinatus and subscapularis RC muscles CSAs continuously declined throughout adulthood, whereas in the infraspinatus and deltoid reduced CSA was prominent from midlife onwards. In the teres minor, CSA was unchanged with age. Most importantly, age-associated patterns were highly similar between subjects without RC tear and those with RC-tears. This suggests that extensive RC muscle atrophy during aging could contribute to RC pathology. We compared muscle pathology between torn infraspinatus and non-torn teres minor and the deltoid in two patients with a massive RC-tear. In the torn infraspinatus we found pronounced fatty droplets, an increase in extracellular collagen-1, a loss of myosin heavy chain-1 expression in myofibers and an increase in Pax7-positive cells. However, the adjacent intact teres minor and deltoid exhibited healthy muscle features. This suggests that satellite cells and the extracellular matrix may contribute to extensive muscle fibrosis in torn RC. We suggest that torn RC muscles display hallmarks of muscle aging whereas the teres minor could represent an aging

  9. Patterns of Age-Associated Degeneration Differ in Shoulder Muscles.

    Science.gov (United States)

    Raz, Yotam; Henseler, Jan F; Kolk, Arjen; Riaz, Muhammad; van der Zwaal, Peer; Nagels, Jochem; Nelissen, Rob G H H; Raz, Vered

    2015-01-01

    Shoulder complaints are common in the elderly and hamper daily functioning. These complaints are often caused by tears in the muscle-tendon units of the rotator cuff (RC). The four RC muscles stabilize the shoulder joint. While some RC muscles are frequently torn in shoulder complaints others remain intact. The pathological changes in RC muscles are poorly understood. We investigated changes in RC muscle pathology combining radiological and histological procedures. We measured cross sectional area (CSA) and fatty infiltration from Magnetic Resonance Imaging with Arthrography (MRA) in subjects without (N = 294) and with (N = 109) RC-tears. Normalized muscle CSA of the four RC muscles and the deltoid shoulder muscle were compared and age-associated patterns of muscle atrophy and fatty infiltration were constructed. We identified two distinct age-associated patterns: in the supraspinatus and subscapularis RC muscles CSAs continuously declined throughout adulthood, whereas in the infraspinatus and deltoid reduced CSA was prominent from midlife onwards. In the teres minor, CSA was unchanged with age. Most importantly, age-associated patterns were highly similar between subjects without RC tear and those with RC-tears. This suggests that extensive RC muscle atrophy during aging could contribute to RC pathology. We compared muscle pathology between torn infraspinatus and non-torn teres minor and the deltoid in two patients with a massive RC-tear. In the torn infraspinatus we found pronounced fatty droplets, an increase in extracellular collagen-1, a loss of myosin heavy chain-1 expression in myofibers and an increase in Pax7-positive cells. However, the adjacent intact teres minor and deltoid exhibited healthy muscle features. This suggests that satellite cells and the extracellular matrix may contribute to extensive muscle fibrosis in torn RC. We suggest that torn RC muscles display hallmarks of muscle aging whereas the teres minor could represent an aging

  10. Electromyographic analysis of the infraspinatus and scapular stabilizing muscles during isometric shoulder external rotation at various shoulder elevation angles

    OpenAIRE

    Uga, Daisuke; Endo, Yasuhiro; Nakazawa, Rie; Sakamoto, Masaaki

    2016-01-01

    [Purpose] This study aimed to clarify activation of the infraspinatus and scapular stabilizing muscles during shoulder external rotation at various shoulder elevation angles. [Subjects] Twenty subjects participated in this study and all measurements were performed on the right shoulder. [Methods] Isometric shoulder external rotation strength and surface electromyographic data were measured with the shoulder at 0°, 45°, 90°, and 135° elevation in the scapular plane. The electromyographic data ...

  11. The influence of experimentally induced pain on shoulder muscle activity

    DEFF Research Database (Denmark)

    Diederichsen, L.P.; Winther, A.; Dyhre-Poulsen, P.;

    2009-01-01

    -105A degrees) at a speed of approximately 120A degrees/s, controlled by a metronome. During abduction, electromyographic (EMG) activity was recorded by intramuscular wire electrodes inserted in two deeply located shoulder muscles and by surface-electrodes over six superficially located shoulder...... muscles. EMG was recorded before pain, during pain and after pain had subsided and pain intensity was continuously scored on a visual analog scale (VAS). During abduction, experimentally induced pain in the supraspinatus muscle caused a significant decrease in activity of the anterior deltoid, upper...... trapezius and the infraspinatus and an increase in activity of lower trapezius and latissimus dorsi muscles. Following subacromial injection a significantly increased muscle activity was seen in the lower trapezius, the serratus anterior and the latissimus dorsi muscles. In conclusion, this study shows that...

  12. The influence of experimentally induced pain on shoulder muscle activity

    DEFF Research Database (Denmark)

    Diederichsen, Louise Pyndt; Winther, Annika; Dyhre-Poulsen, Poul;

    2009-01-01

    -105 degrees) at a speed of approximately 120 degrees/s, controlled by a metronome. During abduction, electromyographic (EMG) activity was recorded by intramuscular wire electrodes inserted in two deeply located shoulder muscles and by surface-electrodes over six superficially located shoulder muscles....... EMG was recorded before pain, during pain and after pain had subsided and pain intensity was continuously scored on a visual analog scale (VAS). During abduction, experimentally induced pain in the supraspinatus muscle caused a significant decrease in activity of the anterior deltoid, upper trapezius...... and the infraspinatus and an increase in activity of lower trapezius and latissimus dorsi muscles. Following subacromial injection a significantly increased muscle activity was seen in the lower trapezius, the serratus anterior and the latissimus dorsi muscles. In conclusion, this study shows that...

  13. Shoulder skin and muscle hemodynamics during backpack carriage.

    Science.gov (United States)

    Mao, Clifford P; Macias, Brandon R; Hargens, Alan R

    2015-11-01

    The purpose of this study was to quantify the effects of loaded backpacks on shoulder muscle oxygenation, skin blood flow, and pain. We hypothesized that backpack load carriage is associated with lower shoulder muscle oxygenation and skin microvascular flow. Near-infrared spectroscopy quantified shoulder tissue oxygenation and laser Doppler flow measured skin microvascular flow. Eight adult volunteers donned a standard backpack without added load, 5 kg load, and 10 kg load for 5 min while standing. An 8 min rest period before each backpack donning condition ensured that all measured parameters returned to baseline. Data were analyzed using a repeated measures ANOVA and significance set at p backpack significantly reduced shoulder muscle oxygenation by 22 ± 23% as compared to the empty backpack control condition (p = 0.023). In addition, a 10 kg backpack load reduced skin microvascular flow by 82 ± 22%, as compared to the empty backpack control condition (p = 0.024). Perceived pain was significantly higher when wearing the 10 kg backpack (level 4 on a 10-maximal pain scale) as compared to the empty backpack (0, 0-no pain) (p backpack loads of 10 kg decrease shoulder muscle oxygenation and skin microvascular flow. PMID:26154207

  14. Effects and predictors of shoulder muscle massage for patients with posterior shoulder tightness

    Directory of Open Access Journals (Sweden)

    Yang Jing-lan

    2012-03-01

    Full Text Available Abstract Background Clinical approaches like mobilization, stretching, and/or massage may decrease shoulder tightness and improve symptoms in subjects with stiff shoulders. We investigated the effect and predictors of effectiveness of massage in the treatment of patients with posterior shoulder tightness. Methods A randomized controlled trial was conducted in a hospital-based outpatient practice (orthopedic and rehabilitation. Forty-three women and 17 men (mean age = 54 years, range 43-73 years with posterior shoulder tightness participated and were randomized into massage and control groups (n = 30 per group. A physical therapist provided the massage on the posterior deltoid, infraspinatus, and teres minor of the involved shoulder for 18 minutes [about 6 minutes for each muscle] two times a week for 4 weeks. For the control group, one therapist applied light hand touch on the muscles 10 minutes two times a week for 4 weeks. Glenohumeral internal rotation ROM, functional status, and muscle tightness were the main outcomes. Additionally, the potential factors on the effectiveness of massage were analyzed by multivariate logistic regression. For this analysis, patients with functional score improvement at least 20% after massage were considered responsive, and the others were considered nonresponsive. Results Fifty-two patients completed the study (29 for the massage and 23 for the control. The overall mean internal rotation ROM increased significantly in the massage group compared to the control (54.9° v.s. 34.9°; P ≤ 0.001. There were 21 patients in the responsive group and 8 in the nonresponsive group. Among the factors, duration of symptoms, functional score, and posterior deltoid tightness were significant predictors of effectiveness of massage. Conclusions Massage was an effective treatment for patients with posterior shoulder tightness, but was less effective in patients with longer duration of symptoms, higher functional limitation

  15. Shoulder muscle firing patterns during the windmill softball pitch.

    Science.gov (United States)

    Maffet, M W; Jobe, F W; Pink, M M; Brault, J; Mathiyakom, W

    1997-01-01

    The purpose of this study was to describe the activity of eight shoulder muscles during the windmill fast-pitch softball throw. Ten collegiate female pitchers were analyzed with intramuscular electromyography, high-speed cinematography, and motion analysis. The supraspinatus muscle fired maximally during arm elevation from the 6 to 3 o'clock position phase, centralizing the humeral head within the glenoid. The posterior deltoid and teres minor muscles acted maximally from the 3 to 12 o'clock position phase to continue arm elevation and externally rotate the humerus. The pectoralis major muscle accelerated the arm from the 12 o'clock position to ball release phase. The serratus anterior muscle characteristically acted to position the scapula for optimal glenohumeral congruency, and the subscapularis muscle functioned as an internal rotator and to protect the anterior capsule. Although the windmill softball pitch is overtly different from the baseball pitch, several surprising similarities were revealed. The serratus anterior and pectoralis major muscles work in synchrony and seem to have similar functions in both pitches. Although the infraspinatus and teres minor muscles are both posterior cuff muscles, they are characteristically uncoupled during the 6 to 3 o'clock position phase, with the infraspinatus muscle acting more independently below 90 degrees. Subscapularis muscle activity seems important in dynamic anterior glenohumeral stabilization and as an internal rotator in both the baseball and softball throws. PMID:9167819

  16. Effects of experimental muscle pain on shoulder-abduction force steadiness and muscle activity in healthy subjects

    DEFF Research Database (Denmark)

    Bandholm, Thomas Quaade; Rasmussen, Lars; Aagaard, Per;

    2007-01-01

    We previously demonstrated that the steadiness of shoulder abduction is reduced in patients with subacromial impingement syndrome (SIS), which might be related to shoulder pain associated with the SIS. The aim of the present study was to examine the acute effects of experimental shoulder muscle...... pain on shoulder motor function in healthy subjects. The fluctuations in exerted force (force steadiness) and electromyographic (EMG) activity from eight shoulder muscles were determined during sub-maximal isometric and dynamic contractions with the shoulder abductors in nine healthy subjects (27.......7 +/- 4.2 years, mean +/- 1 SD) before, during and after experimental pain induction. Experimental pain was induced by bolus injections of 6% hypertonic saline into the supraspinatus muscle. Experimental muscle pain reduced shoulder-abduction force steadiness on average by 21% during isometric...

  17. Movement and muscle activation patterns of the shoulder girdle after stroke

    OpenAIRE

    De Baets, Liesbet

    2015-01-01

    A proper and pain free shoulder function is essential for accurate performance of daily activities and contributes to daily life autonomy and quality of life. The brain damage underlying a stroke results in several motor impairments such as muscle weakness, increased muscle tone, pathological muscle synergies and altered temporal muscle activity. At the level of the shoulder complex, these impairments may specifically hamper scapulohumeral control, i.e. the adaptation of scapular position and...

  18. An MRI study on the relations between muscle atrophy, shoulder function and glenohumeral deformity in shoulders of children with obstetric brachial plexus injury

    OpenAIRE

    van Doorn-Loogman Mirjam H; Mullender Margriet G; van Kooten Ed O; van Gelein Vitringa Valerie M; van der Sluijs Johannes A

    2009-01-01

    Abstract Background A substantial number of children with an obstetric brachial plexus lesion (OBPL) will develop internal rotation adduction contractures of the shoulder, posterior humeral head subluxations and glenohumeral deformities. Their active shoulder function is generally limited and a recent study showed that their shoulder muscles were atrophic. This study focuses on the role of shoulder muscles in glenohumeral deformation and function. Methods This is a prospective study on 24 chi...

  19. Does Subacromial Osteolysis Affect Shoulder Function after Clavicle Hook Plating?

    Science.gov (United States)

    Sun, Siwei; Gan, Minfeng; Sun, Han; Wu, Guizhong; Yang, Huilin; Zhou, Feng

    2016-01-01

    Purpose. To evaluate whether subacromial osteolysis, one of the major complications of the clavicle hook plate procedure, affects shoulder function. Methods. We had performed a retrospective study of 72 patients diagnosed with a Neer II lateral clavicle fracture or Degree-III acromioclavicular joint dislocation in our hospital from July 2012 to December 2013. All these patients had undergone surgery with clavicle hook plate and were divided into two groups based on the occurrence of subacromial osteolysis. By using the Constant-Murley at the first follow-up visit after plates removal, we evaluated patients' shoulder function to judge if it has been affected by subacromial osteolysis. Results. We have analyzed clinical data for these 72 patients, which shows that there is no significant difference between group A (39 patients) and group B (33 patients) in age, gender, injury types or side, and shoulder function (the Constant-Murley scores are 93.38 ± 3.56 versus 94.24 ± 3.60, P > 0.05). Conclusion. The occurrence of subacromial osteolysis is not rare, and also it does not significantly affect shoulder function. PMID:27034937

  20. Molecular signatures of age-associated chronic degeneration of shoulder muscles

    Science.gov (United States)

    Raz, Yotam; Henseler, Jan Ferdinand; Kolk, Arjen; Tatum, Zuotian; Groosjohan, Niels Kuipers; Verwey, Nisha E.; Arindrarto, Wibowo; Kielbasa, Szymon M.; Nagels, Jochem; Hoen, Peter A. C. 't; Nelissen, Rob G. H. H.; Raz, Vered

    2016-01-01

    Chronic muscle diseases are highly prevalent in the elderly causing severe mobility limitations, pain and frailty. The intrinsic molecular mechanisms are poorly understood due to multifactorial causes, slow progression with age and variations between individuals. Understanding the underlying molecular mechanisms could lead to new treatment options which are currently limited. Shoulder complaints are highly common in the elderly, and therefore, muscles of the shoulder's rotator cuff could be considered as a model for chronic age-associated muscle degeneration. Diseased shoulder muscles were characterized by muscle atrophy and fatty infiltration compared with unaffected shoulder muscles. We confirmed fatty infiltration using histochemical analysis. Additionally, fibrosis and loss of contractile myosin expression were found in diseased muscles. Most cellular features, including proliferation rate, apoptosis and cell senescence, remained unchanged and genome-wide molecular signatures were predominantly similar between diseased and intact muscles. However, we found down-regulation of a small subset of muscle function genes, and up-regulation of extracellular region genes. Myogenesis was defected in muscle cell culture from diseased muscles but was restored by elevating MyoD levels. We suggest that impaired muscle functionality in a specific environment of thickened extra-cellular matrix is crucial for the development of chronic age-associated muscle degeneration. PMID:26885755

  1. Molecular signatures of age-associated chronic degeneration of shoulder muscles.

    Science.gov (United States)

    Raz, Yotam; Henseler, Jan Ferdinand; Kolk, Arjen; Tatum, Zuotian; Groosjohan, Niels Kuipers; Verwey, Nisha E; Arindrarto, Wibowo; Kielbasa, Szymon M; Nagels, Jochem; 't Hoen, Peter A C; Nelissen, Rob G H H; Raz, Vered

    2016-02-23

    Chronic muscle diseases are highly prevalent in the elderly causing severe mobility limitations, pain and frailty. The intrinsic molecular mechanisms are poorly understood due to multifactorial causes, slow progression with age and variations between individuals. Understanding the underlying molecular mechanisms could lead to new treatment options which are currently limited. Shoulder complaints are highly common in the elderly, and therefore, muscles of the shoulder's rotator cuff could be considered as a model for chronic age-associated muscle degeneration. Diseased shoulder muscles were characterized by muscle atrophy and fatty infiltration compared with unaffected shoulder muscles. We confirmed fatty infiltration using histochemical analysis. Additionally, fibrosis and loss of contractile myosin expression were found in diseased muscles. Most cellular features, including proliferation rate, apoptosis and cell senescence, remained unchanged and genome-wide molecular signatures were predominantly similar between diseased and intact muscles. However, we found down-regulation of a small subset of muscle function genes, and up-regulation of extracellular region genes. Myogenesis was defected in muscle cell culture from diseased muscles but was restored by elevating MyoD levels. We suggest that impaired muscle functionality in a specific environment of thickened extra-cellular matrix is crucial for the development of chronic age-associated muscle degeneration. PMID:26885755

  2. Shoulder arthroscopy

    Science.gov (United States)

    ... repair; SLAP lesion; Acromioplasty; Bankart repair; Bankart lesion; Shoulder repair; Shoulder surgery; Rotator cuff repair ... their tendons that form a cuff over the shoulder joint. These muscles and tendons hold the arm ...

  3. Shoulder pain

    Science.gov (United States)

    Pain - shoulder ... The shoulder is the most movable joint in the human body. A group of 4 muscles and their tendons, called the rotator cuff, give the shoulder its wide range of motion. Swelling, damage, or ...

  4. Test-retest reliability of isometric shoulder muscle strength measurement with a handheld dynamometer and belt

    OpenAIRE

    Katoh, Munenori

    2015-01-01

    [Purpose] The aim of this study was to develop a method of measuring isometric shoulder joint muscle strength using a handheld dynamometer with a belt and investigate its test-retest reliability. [Subjects] The subjects comprised 40 healthy adults. [Methods] Six types of isometric shoulder muscle strength were measured twice, and reliability was assessed. [Results] The intraclass correlation coefficient (1, 1) values ranged from 0.976 to 0.902. The result of a Bland-Altman analysis showed dif...

  5. Neck and shoulder muscle strength in patients with tension-type headache

    DEFF Research Database (Denmark)

    Madsen, Bjarne K; Søgaard, Karen; Andersen, Lars L;

    2016-01-01

    INTRODUCTION: Tension-type headache (TTH) is highly prevalent in the general population, and it is characterized by increased muscle tenderness with increasing headache frequency and intensity. AIM: The aim of this case-control study was to compare muscle strength in neck and shoulder muscles in...... TTH patients and healthy controls by examining maximal voluntary isometric contraction (MVC) during shoulder abduction, neck flexion and extension as well as the extension/flexion strength ratio of the neck. METHODS: Sixty TTH patients and 30 sex- and age-matched healthy controls were included....... Patients were included if they had TTH ≥8 days per month. The MVC neck extensor and flexor muscles were tested with the participant seated upright. MVC shoulder abduction was tested with the individual lying supine. RESULTS: Compared to controls TTH patients had significantly weaker muscle strength in neck...

  6. Shoulder muscle endurance: the development of a standardized and reliable protocol

    Directory of Open Access Journals (Sweden)

    Roy Jean-Sébastien

    2011-01-01

    Full Text Available Abstract Background Shoulder muscle fatigue has been proposed as a possible link to explain the association between repetitive arm use and the development of rotator cuff disorders. To our knowledge, no standardized clinical endurance protocol has been developed to evaluate the effects of muscle fatigue on shoulder function. Such a test could improve clinical examination of individuals with shoulder disorders. Therefore, the purpose of this study was to establish a reliable protocol for objective assessment of shoulder muscle endurance. Methods An endurance protocol was developed on a stationary dynamometer (Biodex System 3. The endurance protocol was performed in isotonic mode with the resistance set at 50% of each subject's peak torque as measured for shoulder external (ER and internal rotation (IR. Each subject performed 60 continuous repetitions of IR/ER rotation. The endurance protocol was performed by 36 healthy individuals on two separate occasions at least two days apart. Maximal isometric shoulder strength tests were performed before and after the fatigue protocol to evaluate the effects of the endurance protocol and its reliability. Paired t-tests were used to evaluate the reduction in shoulder strength due to the protocol, while intraclass correlation coefficients (ICC and minimal detectable change (MDC were used to evaluate its reliability. Results Maximal isometric strength was significantly decreased after the endurance protocol (P 0.84. Conclusions Changes in muscular performance observed during and after the muscular endurance protocol suggests that the protocol did result in muscular fatigue. Furthermore, this study established that the resultant effects of fatigue of the proposed isotonic protocol were reproducible over time. The protocol was performed without difficulty by all volunteers and took less than 10 minutes to perform, suggesting that it might be feasible for clinical practice. This protocol could be used to induce

  7. Musculoskeletal ultrasonographic findings of the affected and unaffected shoulders in hemiplegic patients

    Directory of Open Access Journals (Sweden)

    Fatma Ali

    2016-01-01

    Conclusion Hemiplegic stroke Results in injury to the affected shoulder and the shoulder on the unaffected side. Musculoskeletal ultrasonography is an essential method in the evaluation of poststroke painful hemiplegic shoulder. However, the US grades did not correlate with the stages of motor recovery.

  8. The activity pattern of shoulder muscles in subjects with and without subacromial impingement

    DEFF Research Database (Denmark)

    Diederichsen, Louise Pyndt; Nørregaard, Jesper; Dyhre-Poulsen, Poul; Winther, Annika; Tufekovic, Goran; Bandholm, Thomas; Rasmussen, Lars Raundal; Krogsgaard, Michael

    2009-01-01

    Altered shoulder muscle activity is frequently believed to be a pathogenetic factor of subacromial impingement (SI) and therapeutic interventions have been directed towards restoring normal motor patterns. Still, there is a lack of scientific evidence regarding the changes in muscle activity in p...

  9. Musculoskeletal ultrasonographic findings of the affected and unaffected shoulders in hemiplegic patients

    OpenAIRE

    Fatma Ali; Mona Hamdy; Rasha A Abdel-Magied; Mostafa M Elian

    2016-01-01

    Background There are many sonographic changes in affected and unaffected shoulders in patients with established hemiplegia. Aim The aim of this study was to evaluate the sonographic findings of hemiplegic shoulder in patients after acute stroke and the detection of the correlation between the physical or sonographic findings and early-onset hemiplegic shoulder pain. Patients and methods Shoulders of 30 patients with cerebrovascular stroke (six male and 24 female patients), 18...

  10. Muscle activation patterns in patients with recurrent shoulder instability

    Directory of Open Access Journals (Sweden)

    Anju Jaggi

    2012-01-01

    Conclusion: The DEMG results suggest that increased activation of LD may play a role in both anterior and posterior shoulder instability; increased activation of PM may play a role in anterior instability.

  11. Shoulder and neck pain during office work : The significance of muscle activity and microcirculation

    OpenAIRE

    2010-01-01

    Pain in the neck and shoulder region is common in office work involving very low‐level muscle activities. The pathogenetic mechanisms underlying the pain development are poorly understood. Evidence for an association between muscle activity and pain is conflicting. Hypotheses focusing on factors regulating blood vessels and/or factors from the microcirculation that activate nociceptors have been proposed. The overall objective of this thesis was to elucidate the significance of muscle a...

  12. Physiological Evaluation of Childcare-Associated Muscle Load on the Neck and Shoulder Region in Japanese Women

    OpenAIRE

    Saori Yoshinaga; Takuma Kiyokawa; Eriko Kuramoto; Hiroe Kinoshita; Seiji Nemoto

    2016-01-01

    The awkward movements and postures associated with childcare activities can lead to musculoskeletal symptoms in the neck and shoulders. “Dakko” is a method for carrying a child in Japan, and recently it has been reported to cause shoulder stiffness. To our knowledge, the relationship between childcare activities and the physical load on the neck and shoulders is poorly understood. The present study aims to clarify the muscle load on the neck and shoulder region through dakko simulations. Firs...

  13. The effect of handedness on electromyographic activity of human shoulder muscles during movement

    DEFF Research Database (Denmark)

    Diederichsen, Louise Pyndt; Nørregaard, Jesper; Dyhre-Poulsen, Poul; Winther, Annika; Tufekovic, Goran; Bandholm, Thomas; Rasmussen, Lars Raundal; Krogsgaard, Michael

    2006-01-01

    activity with surface and intramuscular electrodes in eight muscles of both shoulders in 20 healthy subjects whose hand preference was evaluated using a standard questionnaire. EMG signals were recorded during abduction and external rotation. During abduction, the normalized EMG activity was significantly......The aim of the study was to investigate whether there was a difference in the electromyographic (EMG) activity of human shoulder muscles between the dominant and nondominant side during movement and to explore whether a possible side-difference depends on the specific task. We compared the EMG...

  14. Dislocated shoulder - aftercare

    Science.gov (United States)

    Shoulder dislocation - aftercare; Shoulder subluxation - aftercare; Shoulder reduction - aftercare ... You most likely dislocated your shoulder from a sports injury or accident, such as a fall. You have likely injured (stretched or torn) some of the muscles, ...

  15. EFFECTIVENESS OF FUNCTIONAL MUSCLE STIMULATION IN IMPROVING MOTOR CONTROL AROUND SHOULDER IN PATIENTS WITH HEMIPLEGIA

    Directory of Open Access Journals (Sweden)

    Sirisha Nekkanti

    2015-02-01

    Full Text Available Background: The effect of electrical stimulation on motor outcomes around shoulder in acute hemiplegia is elusive. We tested the effect of stimulation of specific muscles around shoulder on motor outcome in shoulder in patient with hemiplegia. Methods: 32 first time hemiplegic patient of stroke origin were randomly allocated to control and experimental group. Experimental group received electrical stimulation apart from exercises given to both the groups for 2 weeks. Deltoid, infraspinatus and upper trapezius were stimulated, along with attempt to contract the muscles. Stroke Rehabilitation Assessment of Movement (STREAM upper components and manual muscle testing were used for evaluation of outcome. Wilcoxon sign rank test and chi-square tests were used for statistics. Results: Experimental group demonstrated greater recovery compared to control group. In both groups trapezius muscle work showed improvement in large number of patients followed by deltoid. STREAM score changes were seen a more number of patients in experimental group than control group. Conclusion: Electrical stimulation can be considered as an adjunct to exercises around shoulder in early stroke rehabilitation

  16. Reflexes in the shoulder muscles elicited from the human coracoacromial ligament

    DEFF Research Database (Denmark)

    Diederichsen, Louise Pyndt; Nørregaard, Jesper; Krogsgaard, Michael; Fischer-Rasmussen, Torsten; Dyhre-Poulsen, Poul

    2004-01-01

    -2). In both experiments, electrical stimulation of the CAL elicited a general inhibition in the voluntary activated shoulder muscles. In study I the average latencies (mean+/-SE) of the muscular inhibition were 66+/-4 ms (stim-1) and 62+/-4 ms (stim-2) during isometric flexion and 73+/-3 ms (stim-1...

  17. The effect of handedness on electromyographic activity of human shoulder muscles during movement

    DEFF Research Database (Denmark)

    Diederichsen, Louise Pyndt; Nørregaard, Jesper; Dyhre-Poulsen, Poul; Winther, Annika; Tufekovic, Goran; Bandholm, Thomas; Rasmussen, Lars Raundal; Krogsgaard, Michael

    2006-01-01

    The aim of the study was to investigate whether there was a difference in the electromyographic (EMG) activity of human shoulder muscles between the dominant and nondominant side during movement and to explore whether a possible side-difference depends on the specific task. We compared the EMG ac...

  18. Effect of cycling on oxygenation of relaxed neck/shoulder muscles in women with and without chronic pain

    DEFF Research Database (Denmark)

    Andersen, Lars L; Blangsted, Anne Katrine; Nielsen, Pernille Kofoed;

    2010-01-01

    Work-related neck/shoulder muscle pain has been associated with increased anaerobic muscle metabolism. Thus, interventions to enhance oxygenation of painful muscles seem relevant. While cycling with relaxed shoulders has been shown to result in acute neck/shoulder muscle pain reduction, the effect...... on tissue oxygenation remains unknown. The aim of the present study was to investigate tissue oxygenation of the passive trapezius muscle during and after cycling in female workers with (MYA) and without (CON) trapezius myalgia. Eligible participants (n = 17 MYA, n = 8 CON) performed 20 min sub......-maximal cycling in an upright position with relaxed shoulders. Near-infrared spectroscopy was used to measure trapezius muscle oxygenation during and 2 min after the cycling period. For both MYA and CON, oxygenation of the passive trapezius increased in a linear fashion over time, to values approximately 5 micro...

  19. Electromyographic analysis of selected shoulder muscles during a rugby football tackle

    Directory of Open Access Journals (Sweden)

    Herrington Lee

    2009-05-01

    Full Text Available Abstract Background Epidemiological studies have shown that the incidence of shoulder injuries is increasing in rugby and the majority are related to the contact/tackle phase of play. However, no data currently exists that describes preparatory muscle activity during tackle. This information could aid in guiding training and rehabilitation, if available. The purpose of the study was to assess the sequence of onset of EMG activity of selected scapulohumeral muscles during rugby tackle. 15 healthy professional rugby players participated in the study. Surface EMG activity was assessed for timing of onset relative to time of impact during a modified tackle activity in pectorialis major, biceps brachii, latissimus dorsi, serratus anterior and infraspinatus muscles. Results Onset of activity occurred in all muscles prior to impact. Factorial ANOVA showed significant differences between muscles in activation timing (p = 0.0001, paired t-tests revealed that serratus anterior was activated prior to all other muscles tested (p 0.05, except pectorialis major on all comparisons showed significantly later activation timing than all other muscles (p Conclusion Muscle activation timing may if not properly balanced around the shoulder girdle expose the glenohumeral joint to excessive load and stress. This paper demonstrates a simple method which sets out some preliminary normative data in healthy players. Further studies relating these data to injured players are required.

  20. Effect of brief daily resistance training on rapid force development in painful neck and shoulder muscles

    DEFF Research Database (Denmark)

    Jay, Kenneth; Schraefel, Mc; Andersen, Christoffer H;

    2013-01-01

    .05) for both training groups. Maximal muscle strength increased only ~5-6% [mean and 95% confidence interval for 2- and 12-min groups to control, respectively: 2.5 Nm (0.05-0.73) and 2.2 Nm (0.01-0.70)]. No significant differences between the 2- and 12-min groups were evident. A weak but significant......OBJECTIVE: To determine the effect of small daily amounts of progressive resistance training on rapid force development of painful neck/shoulder muscles. METHODS: 198 generally healthy adults with frequent neck/shoulder muscle pain (mean: age 43.1 years, computer use 93% of work time, 88% women......, duration of pain 186 day during the previous year) were randomly allocated to 2- or 12 min of daily progressive resistance training with elastic tubing or to a control group receiving weekly information on general health. A blinded assessor took measures at baseline and at 10-week follow-up; participants...

  1. Shoulder girdle muscle activity and fatigue in traditional and improved design carpet weaving workstations

    Directory of Open Access Journals (Sweden)

    Teimour Allahyari

    2016-04-01

    Full Text Available Objectives: Work-related musculoskeletal disorders in the neck and shoulder regions are common among carpet weavers. Working for prolonged hours in a static and awkward posture could result in an increased muscle activity and may lead to musculoskeletal disorders. Ergonomic workstation improvements can reduce muscle fatigue and the risk of musculoskeletal disorders. Material and Methods: The aim of this study is to assess and to compare upper trapezius and middle deltoid muscle activity in 2 traditional and improved design carpet weaving workstations. These 2 workstations were simulated in a laboratory and 12 women carpet weavers worked for 3 h. Electromyography (EMG signals were recorded during work in bilateral upper trapezius and bilateral middle deltoid. The root mean square (RMS and median frequency (MF values were calculated and used to assess muscle load and fatigue. Repeated measure ANOVA was performed to assess the effect of independent variables on muscular activity and fatigue. The participants were asked to report shoulder region fatigue on the Borg’s Category-Ratio scale (Borg CR-10. Results: Root mean square values in workstation A are significantly higher than in workstation B. Furthermore, EMG amplitude was higher in bilateral trapezius than in bilateral deltoid. However, muscle fatigue was not observed in any of the workstations. Conclusions: The results of the study revealed that muscle load in a traditional workstation was high, but fatigue was not observed. Further studies investigating other muscles involved in carpet weaving tasks are recommended.

  2. Physical Workload On Neck And Shoulder Muscles During Military Helicopter Flight

    DEFF Research Database (Denmark)

    Murray, Mike; Lange, Britt; Olsen, Henrik Baare;

    PHYSICAL WORKLOAD ON NECK AND SHOULDER MUSCLES DURING MILITARY HELICOPTER FLIGHT Murray M, 1, Lange B, 2, Olsen H.B, 1, Søgaard K, 1, Sjøgaard G, 1 1Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, DK 2Department of Anesthesia and Intensive Care Medicine......, Odense University Hospital, DK E-mail: mmurray@health.sdu.dk AIM: Flight-related neck/shoulder pain is common among military helicopter pilots and crew members. During flight, the flight helmet and additional Night Vision Goggles (NVG) pose a considerable load on the cervical spine. The aim of this study...... was to quantify the physical workload on the cervical muscles during flight with and without NVG. METHODS: Nine pilots and nine crew members participated in this study. Before a flight, one pilot and one crew member were equipped with 6 wireless electromyography sensors, positioned bilaterally above trapezius m...

  3. Effect of brief daily resistance training on rapid force development in painful neck and shoulder muscles: randomized controlled trial

    OpenAIRE

    Jay, Kenneth; schraefel, m.c.; Andersen, CH; Ebessen, FH; Christiansen, DH; Skotte, J; Zebis, MK; Andersen, LL

    2013-01-01

    Objective: To determine the effect of small daily amounts of progressive resistance training on rapid force development of painful neck/shoulder muscles. Methods: 198 generally healthy adults with frequent neck/shoulder muscle pain (mean: age 43·1 years, computer use 93% of work time, 88% women, duration of pain 186 day during the previous year) were randomly allocated to 2- or 12 min of daily progressive resistance training with elastic tubing or to a control group receiving weekly informati...

  4. Effect of shoulder flexion angle and exercise resistance on the serratus anterior muscle activity during dynamic hug exercise

    OpenAIRE

    Yoo, Won-Gyu

    2016-01-01

    [Purpose] The primary aim of this study was to determine the effect of shoulder flexion angle and exercise resistance on the serratus anterior muscle during dynamic hug exercise. [Subjects] Ten men aged 22–32 years were recruited. [Methods] The subjects performed dynamic hug exercise at different shoulder flexion angles and under resistance weight conditions. Serratus anterior muscle activities were measured by using the surface electromyographic system during the dynamic hug exercises. After...

  5. The effects of spinal mobilization with arm movements on shoulder muscle strengthening

    OpenAIRE

    Seo, Youngjoon; Lee, Jaeseok; Han, Dongwook

    2015-01-01

    [Purpose] This study was performed to examine the immediate effects of spinal mobilization with arm movements (SMWAMs) for strengthening the shoulder muscles. [Subjects] The subjects of this study were 12 healthy male students who were studying at S University, Busan City. They had no musculoskeletal disease, or upper congenital malformation, and had no history of surgery or neurological disease. [Methods] The SMWAMs were performed on the 4th cervical vertebra (C4). For stimulation of the 5th...

  6. Interrater Reliability of Palpation of Myofascial Trigger Points in Three Shoulder Muscles

    OpenAIRE

    Bron, Carel; Franssen, Jo; Wensing, Michel; Oostendorp, Rob A.B.

    2007-01-01

    This observational study included both asymptomatic subjects (n=8) and patients with unilateral or bilateral shoulder pain (n=32). Patient diagnoses provided by the referring medical physicians included subacromial impingement, rotator cuff disease, tendonitis, tendinopathy, and chronic subdeltoid-subacromial bursitis. Three raters bilaterally palpated the infraspinatus, the anterior deltoid, and the biceps brachii muscles for clinical characteristics of a total of 12 myofascial trigger point...

  7. Differences in Activation Patterns of Shoulder Girdle Muscles in Recurve Archers

    OpenAIRE

    Eroğlu Kolayiş, İpek; Hayri ERTAN

    2016-01-01

    Abstract The purpose of this study was to observe the differences in activation patterns in shoulder girdle muscles of drawing and bow arm during archery shooting. 106 shots were analysed of eight subjects that have been involved in the current study were the associate archers for Turkish junior national team. The measurement sites were prepared according to SENIAM’s recommendations. Pass band of EMG amplifier, sampling rate, maximum intra-electrode impedance and common mode rejection ratio (...

  8. Development of a Deltoid Shoulder Muscle Model for Rhesus Monkey Spaceflight Studies

    Science.gov (United States)

    Riley, Danny A.; Macias, Melissa Y.; Anders, Scott; Slocum, Glenn R.

    1995-01-01

    The acromiodeltoid shoulder muscle was demonstrated to be a suitable model for spaceflight studies. The muscle contains a mixture of fast and slow fibers, permitting analysis of muscle fiber type specific changes. Two biopsy sites per muscle were identified that provided samples not degraded by the biopsy procedure. Both sites contained sufficient numbers fibers for determining changes in fiber type percentages and size. There was adequate bilateral symmetry regarding fiber type composition in the left and right muscles such that a total of four times points can be compared. The ESOP cage did not cause atrophy of deltoid muscle fibers; this means that microgravity-induced atrophy should be detectable. As expected, muscle excision stimulated muscle IgM and IgG muscle autoantibody production. Nonrestrained control animals suppressed this response whereas restrained monkeys showed an abnormally pronounced response indicative a compromised immune system. The presence of ESOP cage-induced changes in the immune response may mask spaceflight-induced effects. The ESOP cage modified the dominant hand operation of the PTS. These results demonstrate the importance of high fidelity ground based controls.

  9. Repetitive arm motion-induced fatigue affects shoulder but not endpoint position sense.

    Science.gov (United States)

    Emery, Kim; Côté, Julie N

    2012-02-01

    Neck/shoulder pain has previously been linked to repetitive work and muscle fatigue. We have shown that asymptomatic people performing repetitive upper limb tasks display signs of shoulder fatigue and of whole-body compensatory strategies. However, the role played by the proprioceptive system in the production of these compensatory strategies has not been studied. A group of asymptomatic adults (n = 18) performed a repetitive pointing task at shoulder height to fatigue. Before and after fatigue, they performed two position sense tasks, eyes closed: a single-joint task where they abducted their shoulder to the perceived horizontal and a multi-joint task, where they stood and placed their finger at the perceived location of a target in front of them at shoulder height. After fatigue, subjects made larger shoulder errors by raising their elbow higher above the horizontal (~ +1.3 cm) than before fatigue; however, their finger position accuracy was not changed, despite all subjects performing the movement in less time (~ -0.18 s) while fatigued. There were no gender differences in shoulder or finger position accuracy before or after fatigue; however, there were gender differences in the perceived finger-target location and in the temporal characteristics of the finger movement toward the target. Results suggest that healthy individuals are able to develop strategies to compensate for fatigue-induced deficits at one joint to maintain the endpoint accuracy of a multi-joint task constant. Gender differences in movement strategies and perception of endpoint location may play parts in the previously reported gender differences in work-related neck/shoulder symptoms. PMID:22124803

  10. Shoulder Rotator Muscle Dynamometry Characteristics: Side Asymmetry and Correlations with Ball-Throwing Speed in Adolescent Handball Players

    Directory of Open Access Journals (Sweden)

    Pontaga Inese

    2014-10-01

    Full Text Available The aim of the investigation was to: 1 compare shoulder external/internal rotator muscles’ peak torques and average power values and their ratios in the dominant and non-dominant arm; 2 determine correlations between shoulder rotator muscles’ peak torques, average power and ball-throwing speed in handball players. Fourteen 14 to 15- year-old male athletes with injury-free shoulders participated in the study (body height: 176 ± 7 cm, body mass 63 ± 9 kg. The tests were carried out by an isokinetic dynamometer system in the shoulder internal and external rotation movements at angular velocities of 60°/s, 90°/s and 240°/s during concentric contractions. The eccentric external- concentric internal rotator muscle contractions were performed at the velocity of 90°/s. The player threw a ball at maximal speed keeping both feet on the floor. The speed was recorded with reflected light rays. Training in handball does not cause significant side asymmetry in shoulder external/internal rotator muscle peak torques or the average power ratio. Positive correlations between isokinetic characteristics of the shoulder internal and external rotator muscles and ball-throwing speed were determined. The power produced by internal rotator muscles during concentric contractions after eccentric contractions of external rotator muscles was significantly greater in the dominant than in the non-dominant arm. Thus, it may be concluded that the shoulder eccentric external/concentric internal rotator muscle power ratio is significantly greater than this ratio in the concentric contractions of these muscles

  11. A comparison of muscle activity in using touchscreen smartphone among young people with and without chronic neck-shoulder pain.

    Science.gov (United States)

    Xie, Yanfei; Szeto, Grace P Y; Dai, Jie; Madeleine, Pascal

    2016-01-01

    This study aimed to examine differences in muscle activity between young people with and without neck-shoulder pain (n = 20 in each group), when they performed texting on a smartphone. Texting was compared between using both hands ('bilateral texting') and with only one hand ('unilateral texting'). Texting tasks were also compared with computer typing. Surface electromyography from three proximal postural muscles and four distal hand/thumb muscles on the right side was recorded. Compared with healthy controls, young people with neck-shoulder pain showed altered motor control consisting of higher muscle activity in the cervical erector spinae and upper trapezius when performing texting and typing tasks. Generally, unilateral texting was associated with higher muscle loading compared with bilateral texting especially in the forearm muscles. Compared with computer typing, smartphone texting was associated with higher activity in neck extensor and thumb muscles but lower activity in upper and lower trapezius as well as wrist extensors. PMID:26218600

  12. Physical workload on neck and shoulder muscles during military helicopter flight - a need for exercise training?

    DEFF Research Database (Denmark)

    Murray, Mike; Lange, Britt; Chreiteh, Shadi Samir;

    Introduction Work-related neck/shoulder pain is a common complaint among military helicopter pilots and crew members. The flight helmet and additional Night Vision Goggles (NVG) place a considerable load on the cervical spine. The aim of this study was to quantify the physical workload on neck....../shoulder muscles to assess possible overload that may call for exercise training to improve capacity and prevent neck pain. Methods Nine pilots and nine crew members from the Royal Danish Air Force participated in a standardized representative flight sortie encompassing: Patient transportation (A-B flight......) and Search and Rescue (SAR flight). A standard helmet was used (1.85 kg). SAR flight was performed with NVG (1.1 kg) and A-B flight was performed +/- NVG. Before take-off, one pilot and one crew member were equipped with 6 wireless electromyography (EMG) sensors bilaterally above m. trapezius (TRA), upper...

  13. Effects of mop handle height on shoulder muscle activity and perceived exertion during floor mopping using a figure eight method.

    Science.gov (United States)

    Wallius, Mari-Anne; Rissanen, Saara M; Bragge, Timo; Vartiainen, Paavo; Karjalainen, Pasi A; Räsänen, Kimmo; Järvelin-Pasanen, Susanna

    2016-01-01

    The aim of this study was to investigate effects of mop handle height on electromyographic (EMG) activities of the shoulder muscles and perceived exertion for the shoulder area during floor mopping using a figure eight method. An experimental study with 13 cleaners was conducted using surface EMG and category ratio (CR-10) scale. EMG activity was recorded unilaterally from the upper trapezius, infraspinatus, anterior and middle deltoid muscles. Each subject performed four trials of mopping and each trial consisted of using a different mop handle height (mop adjustment at the level of shoulder, chin, nose and eye) in randomized order. EMG data were normalized to a percentage of maximal voluntary contraction (%MVC). The muscle activities were assessed by estimating the 10th, 50th and 90th percentiles of the amplitude probability distribution function (APDF) of the EMG signals and analysed by linear mixed model analysis. Results showed that shoulder muscle activity was significantly lower when the mop handle height was adjusted to shoulder level or chin level as compared to eye level. These findings were supported by subjective ratings of exertion. It seems that mop handle height adjustment between shoulder and chin level may be recommended as a basis for figure eight mopping. PMID:26423328

  14. Using your shoulder after surgery

    Science.gov (United States)

    Shoulder surgery - using your shoulder; Shoulder surgery - after ... You had surgery on your shoulder to repair a muscle, tendon, or cartilage tear. The surgeon may have removed damaged tissue. You will need to know how ...

  15. Study of the scapular muscle latency and deactivation time in people with and without shoulder impingement.

    Science.gov (United States)

    Phadke, Vandana; Ludewig, Paula M

    2013-04-01

    Changes in muscle activities are commonly associated with shoulder impingement and theoretically caused by changes in motor program strategies. The purpose of this study was to assess for differences in latencies and deactivation times of scapular muscles between subjects with and without shoulder impingement. Twenty-five healthy subjects and 24 subjects with impingement symptoms were recruited. Glenohumeral kinematic data and myoelectric activities using surface electrodes from upper trapezius (UT), lower trapezius (LT), serratus anterior (SA) and anterior fibers of deltoid were collected as subjects raised and lowered their arm in response to a visual cue. Data were collected during unloaded, loaded and after repetitive arm raising motion conditions. The variables were analyzed using 2 or 3 way mixed model ANOVAs. Subjects with impingement demonstrated significantly earlier contraction of UT while raising in the unloaded condition and an earlier deactivation of SA across all conditions during lowering of the arm. All subjects exhibited an earlier activation and delayed deactivation of LT and SA in conditions with a weight held in hand. The subjects with impingement showed some significant differences to indicate possible differences in motor control strategies. Rehabilitation measures should consider appropriate training measures to improve movement patterns and muscle control. PMID:23137918

  16. Control of leg movements driven by EMG activity of shoulder muscles

    Directory of Open Access Journals (Sweden)

    Valentina La Scaleia

    2014-10-01

    Full Text Available During human walking there exists a functional neural coupling between arms and legs, and between cervical and lumbosacral pattern generators. Here we present a novel approach for associating the electromyographic (EMG activity from upper limb muscles with leg kinematics. Our methodology takes advantage of the high involvement of shoulder muscles in most locomotor-related movements and of the natural coordination between arms and legs. Nine healthy subjects were asked to walk at different constant and variable speeds (3-5 km/h, while EMG activity of shoulder (deltoid muscles and the kinematics of walking were recorded. To ensure a high level of EMG activity in deltoid, the subjects performed slightly larger arm swinging than they usually do. The temporal structure of the burst-like EMG activity was used to predict the spatiotemporal kinematic pattern of the forthcoming step. A comparison of actual and predicted stride leg kinematics showed a high degree of correspondence (r>0.9. This algorithm has been also implemented in pilot experiments for controlling avatar walking in a virtual reality setup and an exoskeleton during overground stepping. The proposed approach may have important implications for the design of human-machine interfaces and neuroprosthetic technologies such as those of assistive lower limb exoskeletons.

  17. Physiological Evaluation of Childcare-Associated Muscle Load on the Neck and Shoulder Region in Japanese Women.

    Science.gov (United States)

    Yoshinaga, Saori; Kiyokawa, Takuma; Kuramoto, Eriko; Kinoshita, Hiroe; Nemoto, Seiji

    2016-01-01

    The awkward movements and postures associated with childcare activities can lead to musculoskeletal symptoms in the neck and shoulders. "Dakko" is a method for carrying a child in Japan, and recently it has been reported to cause shoulder stiffness. To our knowledge, the relationship between childcare activities and the physical load on the neck and shoulders is poorly understood. The present study aims to clarify the muscle load on the neck and shoulder region through dakko simulations. First, the association between dakko movements and trapezius muscle activity is clarified by image and electromyogram analyses. Based on this clarification, the distributions and intensity of the muscle load from repetitive dakko movements are clarified using myogenic potential topography. During dakko movements, trapezius muscle activity was observed when lifting up and setting down the child, but not when holding the child. For the repetitive movements, myogenic electrical potentials were observed in the trapezius region after movement load, and individual characteristics of participants were revealed in both the load distributions and the recovery process. Repetitive dakko movements likely induced sustained muscle tonus in the trapezius, which may be a factor related to shoulder stiffness. PMID:27064421

  18. Physiological Evaluation of Childcare-Associated Muscle Load on the Neck and Shoulder Region in Japanese Women

    Directory of Open Access Journals (Sweden)

    Saori Yoshinaga

    2016-01-01

    Full Text Available The awkward movements and postures associated with childcare activities can lead to musculoskeletal symptoms in the neck and shoulders. “Dakko” is a method for carrying a child in Japan, and recently it has been reported to cause shoulder stiffness. To our knowledge, the relationship between childcare activities and the physical load on the neck and shoulders is poorly understood. The present study aims to clarify the muscle load on the neck and shoulder region through dakko simulations. First, the association between dakko movements and trapezius muscle activity is clarified by image and electromyogram analyses. Based on this clarification, the distributions and intensity of the muscle load from repetitive dakko movements are clarified using myogenic potential topography. During dakko movements, trapezius muscle activity was observed when lifting up and setting down the child, but not when holding the child. For the repetitive movements, myogenic electrical potentials were observed in the trapezius region after movement load, and individual characteristics of participants were revealed in both the load distributions and the recovery process. Repetitive dakko movements likely induced sustained muscle tonus in the trapezius, which may be a factor related to shoulder stiffness.

  19. Effect of the Spacing of Backpack Shoulder Straps on Cervical Muscle Activity, Acromion and Scapular Position, and Upper Trapezius Pain

    OpenAIRE

    Kim, Min-Hee; Yoo, Won-gyu

    2013-01-01

    [Purpose] This study investigated the effect of the spacing of backpack shoulder straps on cervical muscle activity, acromion and scapular position, and upper trapezius (UT) pain. [Subjects] Fourteen males aged 20–32 years, were recruited. [Methods] We measured the MPS (midcervical paraspinal) activity, acromial angle, scapular distance, and UT pain after gait carrying a backpack with different shoulder strap spacings. [Results] The MPS, scapular inferior distance, and UT pressure pain thresh...

  20. Effect of a Multi-Air-Cushion Biofeedback Device (MABD) on Shoulder Muscles during the Dynamic Hug Exercise

    OpenAIRE

    Yoo, Won-Gyu

    2013-01-01

    [Purpose] We developed a multi-air-cushion biofeedback device (MABD) to assist the dynamic hug exercise, and investigated the effects of MABD on the shoulder muscles during the dynamic hug exercise. [Subjects] Twelve males aged 22–32 years were recruited. [Methods] We measured the right side serratus anterior, lower trapezius, and upper trapezius muscle activities during the dynamic hug exercise with and without MABD. [Results] The serratus anterior and lower trapezius muscles activities sign...

  1. Quantified Mechanical Properties of the Deltoid Muscle Using the Shear Wave Elastography: Potential Implications for Reverse Shoulder Arthroplasty

    Science.gov (United States)

    Hatta, Taku; Giambini, Hugo; Sukegawa, Koji; Yamanaka, Yoshiaki; Sperling, John W.; Steinmann, Scott P.; Itoi, Eiji; An, Kai-Nan

    2016-01-01

    The deltoid muscle plays a critical role in the biomechanics of shoulders undergoing reverse shoulder arthroplasty (RSA). However, both pre- and postoperative assessment of the deltoid muscle quality still remains challenging. The purposes of this study were to establish a novel methodology of shear wave elastography (SWE) to quantify the mechanical properties of the deltoid muscle, and to investigate the reliability of this technique using cadaveric shoulders for the purpose of RSA. Eight fresh-frozen cadaveric shoulders were obtained. The deltoid muscles were divided into 5 segments (A1, A2, M, P1 and P2) according to the muscle fiber orientation and SWE values were measured for each segment. Intra- and inter-observer reliability was evaluated using intraclass correlation coefficient (ICC). To measure the response of muscle tension during RSA, the humeral shaft was osteotomized and subsequently elongated by an external fixator (intact to 15 mm elongation). SWE of the deltoid muscle was measured under each stretch condition. Intra- and inter-observer reliability of SWE measurements for all regions showed 0.761–0.963 and 0.718–0.947 for ICC(2,1). Especially, SWE measurements for segments A2 and M presented satisfactory repeatability. Elongated deltoid muscles by the external fixator showed a progressive increase in passive stiffness for all muscular segments. Especially, SWE outcomes of segments A2 and M reliably showed an exponential growth upon stretching (R2 = 0.558 and 0.593). Segmental measurements using SWE could be reliably and feasibly used to quantitatively assess the mechanical properties of the deltoid muscle, especially in the anterior and middle portions. This novel technique based on the anatomical features may provide helpful information of the deltoid muscle properties during treatment of RSA. PMID:27152934

  2. Shoulder reflexes

    DEFF Research Database (Denmark)

    Diederichsen, Louise; Krogsgaard, Michael; Voigt, Michael;

    2002-01-01

    long latency (300 ms) excitatory reflex has been found when nerves in the capsule were stimulated electrically during shoulder surgery. In addition, when the anterior-inferior capsule was excited in conscious humans with modest amplitude electrical stimuli during muscle activity, a strong inhibition...... likely that the joint receptors have a more distinct role for the kinaestethic sense than muscle receptors. In cats a direct reflex from the afferents innervating the shoulder to the muscles around the shoulder has been presented. The reflex had an extremely short latency (2.7-3.1 ms). In man, a very...... was found with an average latency of 33 ms. Stimulation of the sensory nerves in the coracoacromial ligament has also been found to modify muscle activity strongly. Even though our understanding of the control of shoulder motion is incomplete, it is clear that sensory inputs can strongly modify muscle...

  3. Effects of wearing rubber gloves on activities of the forearm and shoulder muscles during different dishwashing stages

    Science.gov (United States)

    Yoo, Won-Gyu

    2015-01-01

    [Purpose] The present study examined the effects of wearing rubber gloves on the activities of the forearm and shoulder muscles during two dishwashing stages. [Subjects] This study included 10 young females. [Methods] The participants performed two dishwashing stages (washing and rinsing) with and without rubber gloves. The activities of the wrist flexor and upper trapezius muscles were measured using wireless electromyography. [Results] During the washing stage, the activities of the wrist flexor and upper trapezius muscles were significantly greater without gloves than with gloves when performing the same tasks. However, during the rinsing stage, the activities of these muscles did not differ significantly according to the use of gloves. [Conclusion] Dishwashers should wear gloves during the washing stage to prevent wrist and shoulder pain. PMID:26311980

  4. Neck and shoulder muscle activity and posture among helicopter pilots and crew-members during military helicopter flight

    DEFF Research Database (Denmark)

    Murray, Mike; Lange, Britt; Chreiteh, Shadi Samir;

    2016-01-01

    Neck pain among helicopter pilots and crew-members is common. This study quantified the physical workload on neck and shoulder muscles using electromyography (EMG) measures during helicopter flight. Nine standardized sorties were performed, encompassing: cruising from location A to location B (AB...

  5. Electromyographic assessment of trunk and shoulder muscles during a Pilates pull-up exercise

    Directory of Open Access Journals (Sweden)

    Isabel C.N. Sacco

    2014-06-01

    Full Text Available This study compares surface electromyographic activity of the internal oblique, rectus abdominis, multifidus, iliocostalis, anterior deltoids during the pull-up on a lower and on a higher difficulty level. We assessed nine adults with previous experience in Pilates. The root mean square (RMS values were normalized by maximum isometric contraction for each participant. During the ascent phase, the low spring position showed a significantly higher RMS than the high spring position of 8.9% for deltoid, 17.2% for internal oblique, 22.3% for rectus abdominis, 4.1% for iliocostalis, and 5.6% for multifidus, and in the descent phase, the RMS in the lower spring exceeded significantly the high spring position in 1.6% for the deltoid, 10% for internal oblique, 31.4% for rectus abdominis and 11.4% for iliocostalis. There was no predominance of abdominal muscles over the shoulder muscle in any spring position. The pull-up exercise can be a useful choice for the core and anterior deltoid muscles strengthening.

  6. Maximum lying bout duration affects the occurrence of shoulder lesions in sows

    Directory of Open Access Journals (Sweden)

    Westin Rebecka

    2009-11-01

    Full Text Available Abstract Shoulder lesions are caused by tissue breakdown of the skin and/or underlying tissue as a result of long lasting pressure. The lesions are commonly seen in sows during the period of lactation and contribute to poor animal welfare as well as affecting the consumers' attitudes towards the swine industry. The aim of this study was to investigate the correlation between prolonged recumbency during early lactation and development of shoulder lesions, in particular the lying bout time. Eighteen sows of Swedish Landrace were observed for 24 hours during the day of farrowing and day 2, 4, 9 and 11 after farrowing in May 2009. The data were analysed for correlations between the duration of the longest observed uninterrupted lying bout and the prevalence of shoulder lesions recorded at weaning (week 5. In the study, shoulder lesions were observed in eight of the eighteen sows at the time of weaning. The total lying time of the sows was highest on day 0 and day 2, when the proportion of time spent in lateral recumbency over the 24-hour period was on average 80 percent. The longest lying bout had an average duration of 6,3 hours (right side and 7,2 hours (left side. A significant correlation (Spearman rank coefficient = 0,88; P

  7. Effects of humeral head compression taping on the isokinetic strength of the shoulder external rotator muscle in patients with rotator cuff tendinitis

    OpenAIRE

    Kim, Moon-Hwan; Oh, Jae-Seop

    2015-01-01

    [Purpose] The purpose of this study was to examine the effects of humeral head compression taping (HHCT) on the strength of the shoulder external rotator muscle in patients with rotator cuff tendinitis. [Subjects and Methods] Twenty patients with rotator cuff tendinitis were recruited. The shoulder external rotator strength was measured using a Biodex isokinetic dynamometer system. A paired t-test was performed to evaluate within-group differences in the strength of the shoulder external rota...

  8. The impact of subacromial impingement syndrome on muscle activity patterns of the shoulder complex: a systematic review of electromyographic studies

    Directory of Open Access Journals (Sweden)

    Smith Toby O

    2010-03-01

    Full Text Available Abstract Background Subacromial impingement syndrome (SIS is a commonly reported cause of shoulder pain. The purpose of this study was to systematically review the literature to examine whether a difference in electromyographic (EMG activity of the shoulder complex exists between people with SIS and healthy controls. Methods Medline, CINAHL, AMED, EMBASE, and grey literature databases were searched from their inception to November 2008. Inclusion, data extraction and trial quality were assessed in duplicate. Results Nine studies documented in eleven papers, eight comparing EMG intensity and three comparing EMG onset timing, representing 141 people with SIS and 138 controls were included. Between one and five studies investigated each muscle totalling between 20 and 182 participants. The two highest quality studies of five report a significant increase in EMG intensity in upper trapezius during scaption in subjects with SIS. There was evidence from 2 studies of a delayed activation of lower trapezius in patients with SIS. There was otherwise no evidence of a consistent difference in EMG activity between the shoulders of subjects with painful SIS and healthy controls. Conclusions A difference may exist in EMG activity within some muscles, in particular upper and lower trapezius, between people with SIS and healthy controls. These muscles may be targets for clinical interventions aiding rehabilitation for people with SIS. These differences should be investigated in a larger, high quality survey and the effects of therapeutically targeting these muscles in a randomised controlled trial.

  9. Inflamed shoulder tendons (image)

    Science.gov (United States)

    Tearing and inflammation of the tendons of the shoulder muscles can occur in sports which require the ... pitching, swimming, and lifting weights. Most often the shoulder will heal if a break is taken from ...

  10. Reduced Muscle Glycogen Differentially Affects Exercise Performance and Muscle Fatigue

    OpenAIRE

    Simon Lees; Williams, Jay H; Batts, Timothy W.

    2013-01-01

    This investigation examined the effects of reduced muscle glycogen on exercise performance and muscle fatigue. Male rats were assigned to a low glycogen group (LG) that participated in a protocol of exercise and fasting, a high glycogen group (HG) that exercised but were allowed free access to food, or control group (CON) that did not exercise but were allowed free access to food. Following the protocol, muscle glycogen content of the LG animals was reduced by 45%. The LG animals also perform...

  11. Bankart Repair to Correct Shoulder Instability

    Medline Plus

    Full Text Available ... the shoulder comes in is a group of muscles behind the shoulder. That group of muscles is known as the scapular stabilizers, and we ... time working very hard to get those shoulder muscles strong so that when that shoulder is in ...

  12. Effect of core muscle thickness and static or dynamic balance on prone bridge exercise with sling by shoulder joint angle in healthy adults

    OpenAIRE

    Park, Mi Hwa; Yu, Jae Ho; Hong, Ji Heon; Kim, Jin Seop; Jung, Sang Woo; Lee, Dong Yeop

    2016-01-01

    [Purpose] To date, core muscle activity detected using ultrasonography during prone bridge exercises has not been reported. Here we investigated the effects of core muscle thickness and balance on sling exercise efficacy by shoulder joint angle in healthy individuals. [Subjects and Methods] Forty-three healthy university students were enrolled in this study. Ultrasonography thickness of external oblique, internal oblique, and transversus abdominis during sling workouts was investigated. Muscl...

  13. Adaptive functional specialisation of architectural design and fibre type characteristics in agonist shoulder flexor muscles of the llama, Lama glama.

    Science.gov (United States)

    Graziotti, Guillermo H; Chamizo, Verónica E; Ríos, Clara; Acevedo, Luz M; Rodríguez-Menéndez, J M; Victorica, C; Rivero, José-Luis L

    2012-08-01

    Like other camelids, llamas (Lama glama) have the natural ability to pace (moving ipsilateral limbs in near synchronicity). But unlike the Old World camelids (bactrian and dromedary camels), they are well adapted for pacing at slower or moderate speeds in high-altitude habitats, having been described as good climbers and used as pack animals for centuries. In order to gain insight into skeletal muscle design and to ascertain its relationship with the llama's characteristic locomotor behaviour, this study examined the correspondence between architecture and fibre types in two agonist muscles involved in shoulder flexion (M. teres major - TM and M. deltoideus, pars scapularis - DS and pars acromialis - DA). Architectural properties were found to be correlated with fibre-type characteristics both in DS (long fibres, low pinnation angle, fast-glycolytic fibre phenotype with abundant IIB fibres, small fibre size, reduced number of capillaries per fibre and low oxidative capacity) and in DA (short fibres, high pinnation angle, slow-oxidative fibre phenotype with numerous type I fibres, very sparse IIB fibres, and larger fibre size, abundant capillaries and high oxidative capacity). This correlation suggests a clear division of labour within the M. deltoideus of the llama, DS being involved in rapid flexion of the shoulder joint during the swing phase of the gait, and DA in joint stabilisation during the stance phase. However, the architectural design of the TM muscle (longer fibres and lower fibre pinnation angle) was not strictly matched with its fibre-type characteristics (very similar to those of the postural DA muscle). This unusual design suggests a dual function of the TM muscle both in active flexion of the shoulder and in passive support of the limb during the stance phase, pulling the forelimb to the trunk. This functional specialisation seems to be well suited to a quadruped species that needs to increase ipsilateral stability of the limb during the support

  14. Shoulder Manipulation After Distention Arthrography: Does Audible Cracking Affect Improvement in Adhesive Capsulitis? A Preliminary Study

    OpenAIRE

    Choi, Jun Kyu; Son, Seok Beom; Park, Bum Jun; Yang, Seung Nam; Yoon, Joon Shik

    2015-01-01

    Objective To investigate whether an audible cracking sound during shoulder manipulation following distention arthrography is clinically significant in patients with adhesive capsulitis of the shoulder. Methods A total of 48 patients (31 women, 17 men) with primary adhesive capsulitis of the shoulder completed the study. All participants underwent C-arm-guided arthrographic distention of the glenohumeral joint with injections of a corticosteroid and normal saline. After distention, we performe...

  15. Shoulder biomechanics

    Energy Technology Data Exchange (ETDEWEB)

    Lugo, Roberto; Kung, Peter; Ma, C. Benjamin [Sports Medicine and Shoulder Service, University of California, San Francisco, 500 Parnassus Avenue, MU 320W-0728 San Francisco, CA 914143 (United States)], E-mail: maben@orthosurg.ucsf.edu

    2008-10-15

    The biomechanics of the glenohumeral joint depend on the interaction of both static and dynamic-stabilizing structures. Static stabilizers include the bony anatomy, negative intra-articular pressure, the glenoid labrum, and the glenohumeral ligaments along with the joint capsule. The dynamic-stabilizing structures include the rotator cuff muscles and the other muscular structures surrounding the shoulder joint. The combined effect of these stabilizers is to support the multiple degrees of motion within the glenohumeral joint. The goal of this article is to review how these structures interact to provide optimal stability and how failure of some of these mechanisms can lead to shoulder joint pathology.

  16. Comparison of the Forward Head Posture on Scapular Muscle Contributions During Shoulder Flexion of Predominant Arm in Women with Forward Head Posture

    Directory of Open Access Journals (Sweden)

    Farhad Rezazadeh

    2014-06-01

    Full Text Available Background: Because of the corrigibility of forward head posture (FHP, the recognition of the relationship between this deformity and scapular rotator muscles may be influential on scapular muscle activities in detection of better way to improve movement disorders. Therefore, the aim of this study was to compare the serratus anterior, upper and lower trapezius muscle contributions during shoulder flexion without weight in women with and without FHP. Materials and Methods: In this case-control study was carried out on 18 women with FHP and 14 healthy subjects who were matched. EMG muscle activities were recorded during shoulder flexion and abduction. The value of each muscle divided on total muscle values to calculate contribution ratio and independent t-test was used to compare contributions between groups. Results: There was a significant decrease in serratus anterior muscle activity ratio (p=0.002 and a significant increase in upper trapezius muscle activity ratio (p=0.001 between subjects with and without FHP. There was not also significant difference in contribution of lower trapezius muscle. Conclusion: Contribution of the serratus anterior muscle in individuals with forward head posture is less than healthy subjects. The contribution of upper trapezius muscle also in individuals with FHP is greater than healthy subjects.

  17. Effect of a Home Based Exercise Program on Postmenopausal Women’s Shoulder Girdle Muscle Strength for Women with Breast Cancer

    Directory of Open Access Journals (Sweden)

    M. Akoochakian

    2014-10-01

    Full Text Available Introduction & Objective: Reducing in muscle strength of the shoulder girdle is a side effect of breast cancer treatment. The aim of this study was to determine the effect of 4 weeks of resistance and mobility training on the shoulder girdle strength of women with breast cancer. Materials & Methods: In this randomized clinical trial study twenty-seven postmenopausal women with breast cancer (mean age, 51±5.96 years, (mean height, 158.08±7.2 cm, (mean weight, 63.08±11.06 kg who underwent surgery, chemotherapy and radiation therapy, were purposefully selected and divided into two groups of intervention and control. Intervention group performed 4 weeks (4 sessions per week of resistance training with flex-band and stretch training at home, but the control group did not participate in any sports or physical program. Muscle strength before and after intervention was measured using a handheld dynamometer. The data were analyzed using ANCOVA. Results: Significant differences were seen between intervention and control groups in shoulder flexion, scapula abduction and upward rotation, shoulder internal rotation, shoulder external rotation, shoulder horizontal adduction and scapula depression and adduction strength, as all strength variables increased after 4 weeks exercise. Conclusion: Since strength plays an important role in ADL performance and shoulder girdle function in breast cancer survivors, it seems that muscle strength improvement following combined home based exercise program can help patients after treatment to easier and faster rehabilitation. (Sci J Hamadan Univ Med Sci 2014; 21 (3: 185-195

  18. Effects of push-up exercise on shoulder stabilizer muscle activation according to the grip thickness of the push-up bar

    OpenAIRE

    Jung, Jaemin; Cho, Woonik

    2015-01-01

    [Purpose] This study investigated the effects of bar thickness on shoulder stabilizer muscle activation during push-up exercise. [Subjects] Twenty-six healthy male adults in their twenties. [Methods] The study had four experimental conditions (grip thicknesses of 0%, 50%, 75%, and 100% of the subjects’ hand size). Measurements were conducted from the start to the end of push-up for deltoid anterior fiber, deltoid posterior fiber, infraspinatus, serratus anterior, and pectoralis major muscle a...

  19. Towards the development of a novel experimental shoulder simulator with rotating scapula and individually controlled muscle forces simulating the rotator cuff.

    Science.gov (United States)

    Baumgartner, Daniel; Tomas, Daniel; Gossweiler, Lukas; Siegl, Walter; Osterhoff, Georg; Heinlein, Bernd

    2014-03-01

    A preclinical analysis of novel implants used in shoulder surgery requires biomechanical testing conditions close to physiology. Existing shoulder experiments may only partially apply multiple cycles to simulate postoperative, repetitive loading tasks. The aim of the present study was therefore the development of an experimental shoulder simulator with rotating scapula able to perform multiple humeral movement cycles by simulating individual muscles attached to the rotator cuff. A free-hanging, metallic humerus pivoted in a polyethylene glenoid is activated by tension forces of linear electroactuators to simulate muscles of the deltoideus (DELT), supraspinatus (SSP), infraspinatus/teres minor and subscapularis. The abductors DELT and SSP apply forces with a ratio of 3:1 up to an abduction angle of 85°. The rotating scapular part driven by a rotative electro actuator provides one-third to the overall arm abduction. Resulting joint forces and moments are measured by a 6-axis load cell. A linear increase in the DELT and SSP motors is shown up to a maximum of 150 and 50 N for the DELT and SSP, respectively. The force vector in the glenoid resulted in 253 N at the maximum abduction. The present investigation shows the contribution of individual muscle forces attached to the moving humerus to perform active abduction in order to reproducibly test shoulder implants. PMID:24170552

  20. Quantitative ultrasound tissue characterization in shoulder and thigh muscles – a new approach

    DEFF Research Database (Denmark)

    Nielsen, P.K.; Jensen, B.R.; Darvann, Tron Andre;

    2006-01-01

    method for characterization of ultrasound images of the supraspinatus muscle, and the vastus lateralis muscle. Methods: Computerized texture analyses employing first-order and higher-order grey-scale statistics were developed to objectively characterize ultrasound images of m. supraspinatus and m. vastus......Background: The echogenicity patterns of ultrasound scans contain information of tissue composition in muscles. The aim was: ( 1) to develop a quantitative ultrasound image analysis to characterize tissue composition in terms of intensity and structure of the ultrasound images, and ( 2) to use the...

  1. Cross-Sectional Area of the Rotator Cuff Muscles in MRI - Is there Evidence for a Biomechanical Balanced Shoulder?

    Directory of Open Access Journals (Sweden)

    Samy Bouaicha

    Full Text Available To provide in-vivo evidence for the common biomechanical concept of transverse and craniocaudal force couples in the shoulder that are yielded by both the rotator cuff muscles (RCM and the deltoid and to quantitatively evaluate and correlate the cross-sectional areas (CSA of the corresponding RCM as a surrogate marker for muscle strength using MRI.Fifty patients (mean age, 36 years; age range, 18-57 years; 41 male, 9 female without rotator cuff tears were included in this retrospective study. Data were assessed by two readers. The CSA (mm2 of all rotator cuff muscles was measured on parasagittal T1-weighted FSE sequence at two different positions (at the established "y-position" and at a more medial slice in the presumably maximal CSA for each muscle, i.e., the "set position". The CSA of the deltoid was measured on axial intermediate-weighted FSE sequences at three positions. CSA measurements were obtained using 1.5 Tesla MR-arthrographic shoulder. Pearson's correlation for the corresponding CSA of the force couple as well as was the intraclass correlation coefficient for the inter- and intra-reader agreement was calculated.The mean CSA was 770 mm2 (±167 and 841 mm2 (±191 for the supraspinatus (in the y- and set-positions, respectively and 984 mm2 (±241 and 1568 mm2 (±338 for the infraspinatus. The mean CSA was 446 mm2 (±129 and 438 mm2 (±128 for the teres minor (in the y- and set-positions, respectively and 1953 mm2 (±553 and 2343 mm2 (±587 for the subscapularis. The three measurements of the deltoid revealed a CSA of 3063 mm2 (±839 for the upper edge, 3829 mm2 (±836 for the lower edge and 4069 mm2 (±937 for the middle of the glenoid. At the set position Pearson's correlation of the transverse force couple (subscapularis/infraspinatus showed a moderate positive correlation of r = 0.583 (p<0.0001 and a strong correlation when the CSA of the teres minor was added to the infraspinatus CSA (r = 0.665, p = 0.0008 and a strong positive

  2. Shoulder replacement - discharge

    Science.gov (United States)

    Total shoulder arthroplasty - discharge; Endoprosthetic shoulder replacement - discharge; Partial shoulder replacement - discharge; Partial shoulder arthroplasty - discharge; Replacement - shoulder - discharge; ...

  3. Shoulder arthroscopy

    Science.gov (United States)

    ... cuff repair Shoulder CT scan Shoulder MRI scan Shoulder pain Patient Instructions Rotator cuff exercises Rotator cuff - self-care Shoulder surgery - discharge Surgical wound care - open Using your ...

  4. Shoulder Instability

    Science.gov (United States)

    ... Risk Factors Is shoulder instability the same as shoulder dislocation? No. The signs of dislocation and instability might ... the same to you--weakness and pain. However, dislocation occurs when your shoulder goes completely out of place. The shoulder ligaments ...

  5. The effects of shoulder load and pinch force on electromyographic activity and blood flow in the forearm during a pinch task

    DEFF Research Database (Denmark)

    Visser, Bart; Kofoed Nielsen, Pernille; de Kraker, Heleen; Smits, Miriam; Jensen, Bente Rona; Veeger, Dirkjan; van Dieën, Jaap H.

    2006-01-01

    loaded with 4.95 kg each) were combined with intermittent pinch forces at 0, 10 and 25% of the maximum voluntary contraction (MVC). Blood flow to the forearm was measured with Doppler ultrasound. Myoelectric activity of the forearm and neck-shoulder muscles was recorded to check for the workload levels......The object of the current study was to determine whether static contraction of proximal musculature has an effect on the blood flow more distally in the upper extremity. Static contractions of muscles in the neck shoulder region at three levels (relaxed, shoulders elevated and shoulders elevated....... Across all levels of shoulder load, blood flow increased significantly with increasing pinch force (21% at 10% MVC and by 44% at 25% MVC). Blood flow was significantly affected by shoulder load, with the lowest blood flow at the highest shoulder load. Interactions of pinch force and shoulder load were...

  6. Correlation of shoulder and elbow injuries with muscle tightness, core stability, and balance by longitudinal measurements in junior high school baseball players.

    Science.gov (United States)

    Endo, Yasuhiro; Sakamoto, Masaaki

    2014-05-01

    [Purpose] The present study longitudinally investigated injury occurrences and the risk factors for muscle tightness, core stability, and dynamic standing balance among junior high school student baseball players. [Subjects] Thirty-nine male students, belonging to baseball clubs at 2 junior high schools, participated in this study. [Methods] Study measurements were obtained twice, once in the early stage of the baseball season (March) and once at the end of the season (July). All subjects underwent muscle tightness testing, the Star Excursion Balance Test (SEBT), and trunk endurance testing during each measurement session. [Results] Fifteen players experienced episodes of elbow or shoulder pain while throwing. Players in the pain group demonstrated a significant increase in the tightness of their shoulder internal rotators, axis-leg quadriceps, and axis-leg hamstrings. There was no clear evidence of differences of changes in core stability and dynamic standing balance between the groups. [Conclusion] The results of this study suggest that lower extremity muscle tightness early in a season and the subsequent decline in the flexibility of the axis-leg quadriceps and hamstrings during the season may be due to an increased upper extremity load while throwing, thus producing shoulder and elbow pain. PMID:24926133

  7. Increasing preoperative dislocations and total time of dislocation affect surgical management of anterior shoulder instability

    OpenAIRE

    Denard, Patrick J.; Xuesong Dai; Burkhart, Stephen S.

    2015-01-01

    Purpose: Our purpose was to determine the relationship between number of preoperative shoulder dislocations and total dislocation time and the need to perform bone deficiency procedures at the time of primary anterior instability surgery. Our hypothesis was that need for bone deficiency procedures would increase with the total number and hours of dislocation. Materials and Methods: A retrospective review was performed of primary instability surgeries performed by a single surgeon. Patient...

  8. Skeletal muscle contractility, self-reported pain and tissue sensitivity in females with neck/shoulder pain and upper Trapezius myofascial trigger points - a randomized intervention study

    DEFF Research Database (Denmark)

    Myburgh, Corrie; Hartvigsen, Jan; Aagaard, Per;

    2012-01-01

    ABSTRACT: BACKGROUND: In relation to Myofascial Triggerpoints (MFTrPs) of the upper Trapezius, this study explored muscle contractility characteristics, the occurrence of post-intervention muscle soreness and the effect of dry needling on muscle contractile characteristics and clinical outcomes......-intervention and 48 hours post-intervention. Symptomatic and asymptomatic participant groups were each randomized into two treatment sub-groups (superficial (SDN) and deep dry needling (DDN)) after baseline testing. At 48 hours post-intervention participants were asked whether delayed onset muscle soreness (DOMS) and...... or intervention (p=0.001). CONCLUSIONS: In selected female neck/shoulder pain sufferers, maximum voluntary contraction and rapid force generation of the upper Trapezius was not influenced by clinically relevant self-reported pain or the presence of diagnostically relevant MFTrPs. Dry needling, deep or superficial...

  9. Shoulder instability

    International Nuclear Information System (INIS)

    Shoulder instability is a common clinical feature leading to recurrent pain and limitated range of motion within the glenohumeral joint. Instability can be due a single traumatic event, general joint laxity or repeated episodes of microtrauma. Differentiation between traumatic and atraumatic forms of shoulder instability requires careful history and a systemic clinical examination. Shoulder laxity has to be differentiated from true instability followed by the clinical assessment of direction and degree of glenohumeral translation. Conventional radiography and CT are used for the diagnosis of bony lesions. MR imaging and MR arthrography help in the detection of soft tissue affection, especially of the glenoid labrum and the capsuloligamentous complex. The most common lesion involving the labrum is the anterior labral tear, associated with capsuloperiostal stripping (Bankart lesion). A number of variants of the Bankart lesion have been described, such as ALPSA, SLAP or HAGL lesions. The purpose of this review is to highlight different forms of shoulder instability and its associated radiological findings with a focus on MR imaging. (orig.)

  10. Morphology of the muscles of the shoulder, arms and forearms of the coati (Nasua nasua

    Directory of Open Access Journals (Sweden)

    Amilton Cesar dos Santos

    2010-09-01

    Full Text Available The coati is an animal that belongs to the Phylum Chordata, the Class Mammalia, the Order Carnivora and the Procyonidae family. The striking feature of the family Procyonidae is the presence of five digits on the paws. These animals are classified as plantigrades and can do hand movements in different directions. It has habits of climbing trees to procreate, fleeing from danger, and sleeping at night. It feeds on fruits, small vertebrates, insects, nectar, eggs and vegetables. For this work were used three euthanized animals, from the Scientific Breeding Center (CECRIMPAS – UNIFEOB authorized by IBAMA (Process nº 02027.003731/04-76, fixed in formaldehyde solution 10%. This work describes the morphology of the muscles of the forelimb of the coati, through dissection and photographic documentation. In the studied species, we found anatomical adaptations of thoracic limb muscles which had a mass volume much greater than in other species (puma, alpaca, dog, cat, lhama and Cebus apella monkeys, and this fact was found to be directly related to their abilities in climbing and handicraft.

  11. Frozen shoulder

    Science.gov (United States)

    ... a frozen shoulder are: Decreased motion of the shoulder Pain Stiffness Frozen shoulder without any known cause starts ... If you have shoulder pain and stiffness and think you have a frozen shoulder, contact your health care provider for referral and treatment.

  12. Association of Perceived Stress and Stiff Neck/Shoulder with Health Status : Multiple Regression Models by Gender

    OpenAIRE

    Kimura, Tomoaki; Tsuda, Yasutami; Uchida, Seiya; Eboshida, Akira

    2006-01-01

    It is well known that psychological stress affects health status. Stiff neck and shoulder in a broad sense is one of the major somatic complaints among Japanese. The objective was to determine how much perceived stress and stiff neck/shoulder are associated with healthrelated quality of life (HRQoL) by gender. Participants (n=512) completed the Japanese version of Perceived Stress Scale, the SF-8 Japanese version and original questions on perceived stiff neck/shoulder. Muscle hardness around ...

  13. Reduced neck-shoulder muscle strength and aerobic power together with increased pericranial tenderness are associated with tension-type headache in girls

    DEFF Research Database (Denmark)

    Tornoe, Birte; Andersen, Lars L; Skotte, Jørgen H; Jensen, Rigmor; Gard, Gunvor; Skov, Liselotte; Hallström, Inger

    2013-01-01

    BACKGROUND: Tension-type headaches (TTH) are common among children worldwide and mean a potential risk of disability and medication overuse headache. The associated mechanisms, however, remain unsolved. Our study investigated muscle strength in the neck-shoulder region, aerobic power and pericran...... educational programmes on enhanced physical exercising. Much more exact and detailed research in young girls and boys are needed....... pericranial tenderness in girls with TTH compared with healthy controls. METHODS: A blinded case-control study comprising 41 girls with TTH and 41 age-matched healthy controls. Standardised testing of isometric maximal voluntary contraction (MVC) and force steadiness of neck flexion and extension, as well as...... MVC and rate-of-force development of dominant shoulder, was conducted. VO2 max was recorded by a submaximal ergometer test and pericranial tenderness by standardised manual palpation. Logistic regression analyses were applied. RESULTS: Girls with TTH demonstrated significantly higher pericranial...

  14. Whole transcriptome data analysis of zebrafish mutants affecting muscle development.

    Science.gov (United States)

    Armant, Olivier; Gourain, Victor; Etard, Christelle; Strähle, Uwe

    2016-09-01

    Formation of the contractile myofibril of the skeletal muscle is a complex process which when perturbed leads to muscular dystrophy. Herein, we provide a mRNAseq dataset on three different zebrafish mutants affecting muscle organization during embryogenesis. These comprise the myosin folding chaperone unc45b (unc45b-/-), heat shock protein 90aa1.1 (hsp90aa1.1-/-) and the acetylcholine esterase (ache-/-) gene. The transcriptome analysis was performed in duplicate experiments at 72 h post-fertilization (hpf) for all three mutants, with two additional times of development (24 hpf and 48 hpf) for unc45b-/-. A total of 20 samples were analyzed by hierarchical clustering for differential gene expression. The data from this study support the observation made in Etard et al. (2015) [1] (http://dx.doi.org/10.1186/s13059-015-0825-8) that a failure to fold myosin activates a unique transcriptional program in the skeletal muscles that is different from that induced in stressed muscle cells. PMID:27274534

  15. Effect of Brief Daily Resistance Training on Occupational Neck/Shoulder Muscle Activity in Office Workers with Chronic Pain: Randomized Controlled Trial

    Directory of Open Access Journals (Sweden)

    Mark Lidegaard

    2013-01-01

    Full Text Available Purpose. This study investigates the acute and longitudinal effects of resistance training on occupational muscle activity in office workers with chronic pain. Methods. 30 female office workers with chronic neck and shoulder pain participated for 10 weeks in high-intensity elastic resistance training for 2 minutes per day (n=15 or in control receiving weekly email-based information on general health (n=15. Electromyography (EMG from the splenius and upper trapezius was recorded during a normal workday. Results. Adherence to training and control interventions were 86% and 89%, respectively. Compared with control, training increased isometric muscle strength 6% (P<0.05 and decreased neck/shoulder pain intensity by 40% (P<0.01. The frequency of periods with complete motor unit relaxation (EMG gaps decreased acutely in the hours after training. By contrast, at 10-week follow-up, training increased average duration of EMG gaps by 71%, EMG gap frequency by 296% and percentage time below 0.5%, and 1.0% EMGmax by 578% and 242%, respectively, during the workday in m. splenius. Conclusion. While resistance training acutely generates a more tense muscle activity pattern, the longitudinal changes are beneficial in terms of longer and more frequent periods of complete muscular relaxation and reduced pain.

  16. The impact of subacromial impingement syndrome on muscle activity patterns of the shoulder complex: a systematic review of electromyographic studies

    OpenAIRE

    Smith Toby O; Chester Rachel; Hooper Lee; Dixon John

    2010-01-01

    Abstract Background Subacromial impingement syndrome (SIS) is a commonly reported cause of shoulder pain. The purpose of this study was to systematically review the literature to examine whether a difference in electromyographic (EMG) activity of the shoulder complex exists between people with SIS and healthy controls. Methods Medline, CINAHL, AMED, EMBASE, and grey literature databases were searched from their inception to November 2008. Inclusion, data extraction and trial quality were asse...

  17. Acute arginine supplementation fails to improve muscle endurance or affect blood pressure responses to resistance training.

    Science.gov (United States)

    Greer, Beau K; Jones, Brett T

    2011-07-01

    Dietary supplement companies claim that arginine supplements acutely enhance skeletal muscular endurance. The purpose of this study was to determine whether acute arginine α-ketoglutarate supplementation (AAKG) will affect local muscle endurance of the arm and shoulder girdle or the blood pressure (BP) response to anaerobic exercise. Twelve trained college-aged men (22.6 ± 3.8 years) performed 2 trials of exercise separated by at least 1 week. At 4 hours before, and 30 minutes before exercise, a serving of an AAKG supplement (3,700 mg arginine alpha-ketoglutarate per serving) or placebo was administered. Resting BP was assessed pre-exercise after 16 minutes of seated rest, and 5 and 10 minutes postexercise. Three sets each of chin-ups, reverse chin-ups, and push-ups were performed to exhaustion with 3 minutes of rest between each set. Data were analyzed using repeated-measures analysis of variance and paired t-tests. The AAKG supplementation did not improve muscle endurance or significantly affect the BP response to anaerobic work. Subjects performed fewer total chin-ups (23.75 ± 6.38 vs. 25.58 ± 7.18) and total trial repetitions (137.92 ± 28.18 vs. 141.08 ± 28.57) in the supplement trial (p ≤ 0.05). Subjects executed fewer reverse chin-ups (5.83 ± 1.85 vs. 6.75 ± 2.09) during set 2 after receiving the supplement as compared to the placebo (p AAKG supplementation may hinder muscular endurance, the use of these supplements before resistance training should be questioned. PMID:21399536

  18. Bankart Repair to Correct Shoulder Instability

    Medline Plus

    Full Text Available ... strength of the shoulder comes in is a group of muscles behind the shoulder. That group of muscles is known as the scapular stabilizers, ... actually, the rotator cuff is one in the group of muscles that we strengthened that give the ...

  19. Shoulder MRI scan

    Science.gov (United States)

    ... finding on an x-ray or bone scan Shoulder pain and fever Decreased motion of the shoulder joint ... of the shoulder joint Shoulder instability Shoulder weakness Shoulder pain and a history of cancer Shoulder pain that ...

  20. Analysis of applied forces and electromyography of back and shoulders muscles when performing a simulated hand scaling task.

    Science.gov (United States)

    Porter, William; Gallagher, Sean; Torma-Krajewski, Janet

    2010-05-01

    Hand scaling is a physically demanding task responsible for numerous overexertion injuries in underground mining. Scaling requires the miner to use a long pry bar to remove loose rock, reducing the likelihood of rock fall injuries. The experiments described in this article simulated "rib" scaling (scaling a mine wall) from an elevated bucket to examine force generation and electromyographic responses using two types of scaling bars (steel and fiberglass-reinforced aluminum) at five target heights ranging from floor level to 176 cm. Ten male and six female subjects were tested in separate experiments. Peak and average force applied at the scaling bar tip and normalized electromyography (EMG) of the left and right pairs of the deltoid and erectores spinae muscles were obtained. Work height significantly affected peak prying force during scaling activities with highest force capacity at the lower levels. Bar type did not affect force generation. However, use of the lighter fiberglass bar required significantly more muscle activity to achieve the same force. Results of these studies suggest that miners scale points on the rock face that are below their knees, and reposition the bucket as often as necessary to do so. PMID:19800050

  1. Potassium and insulin affect the contractility of abomasal smooth muscle.

    Science.gov (United States)

    Türck, G; Leonhard-Marek, S

    2010-08-01

    Abomasal displacement is a frequent and important disease of high yielding dairy cows. Although several factors are related to its occurrence, the pathogenesis of the condition is still inadequately understood, particularly in regard to K(+) and insulin homeostasis. For this reason the aim was to investigate the effects of K(+) and insulin concentrations on in vitro motility of abomasal smooth muscle. The second aim was to determine whether the in vivo change in K(+) and insulin levels might be sufficient to induce reduced abomasal motility. Muscle strips were isolated from the abomasum of slaughtered cows and incubated in buffer solution under isometric conditions. Results show that a decrease in extracellular K(+) (between 5 and 1 mmol/L) or an increase in extracellular insulin concentrations (to 21 mU/L or higher) were able to affect the contraction activity of abomasal muscles. Contraction activity given as median (25th, 75th percentiles) changed from 28.1 mN/min (2.5, 49.9) at 5 mmol/L of K(+) to 9.4 mN/min (0.6, 35.7) at 1 mmol/L of K(+), and from 34.5 mN/min (10.8, 112.4) at 0 mU/L of insulin to 12.0 mN/min (7.6, 49.8) at 120 mU/L of insulin. Because the effect of insulin could be abolished by barium, glybenclamide, or ouabain, the underlying mechanisms of the insulin action could be an increased K(+) conductance or an increased Na/K-ATPase activity or both. Low K(+) or high insulin concentrations both reduced the activity of the circular muscle of the abomasal corpus (i.e., of the part that is responsible for the propulsion of abomasal chymus) and might play an important role in the pathogenesis of abomasal displacement. PMID:20655424

  2. Shoulder Osteoarthritis Treatment (Beyond the Basics)

    Science.gov (United States)

    ... shoulder to the point of tension but not pain. SHOULDER-STRENTGTHENING EXERCISES — Muscle-toning exercises should be performed ... diagnosis of rotator cuff tears Rotator cuff tendinopathy Shoulder impingement syndrome The following organizations also provide reliable health information. ● ...

  3. Shoulder proprioception in baseball pitchers.

    Science.gov (United States)

    Safran, M R; Borsa, P A; Lephart, S M; Fu, F H; Warner, J J

    2001-01-01

    We examined proprioceptive differences between the dominant and nondominant shoulders of 21 collegiate baseball pitchers without a history of shoulder instability or surgery. A proprioceptive testing device was used to measure kinesthesia and joint position sense. Joint position sense was significantly (P =.05) more accurate in the nondominant shoulder than in the dominant shoulder when starting at 75% of maximal external rotation and moving into internal rotation. There were no significant differences for proprioception in the other measured positions or with kinesthesia testing. Six pitchers with recent shoulder pain had a significant (P =.04) kinesthetic deficit in the symptomatic dominant shoulder compared with the asymptomatic shoulder, as measured in neutral rotation moving into internal rotation. The net effect of training, exercise-induced laxity, and increased external rotation in baseball pitchers does not affect proprioception, although shoulder pain, possibly due to rotator cuff inflammation or tendinitis, is associated with reduced kinesthetic sensation. PMID:11641701

  4. Shoulder Fractures

    Science.gov (United States)

    ... a Hand Therapist? Media Find a Hand Surgeon Shoulder Fractures Email to a friend * required fields From * ... can create difficulty with its function. Types of Shoulder Fractures The type of fracture varies by age. ...

  5. Posterior shoulder pain and anterior instability: a preliminary clinical study.

    Science.gov (United States)

    Castagna, Alessandro; Conti, Marco; Borroni, Mario; Massazza, Giuseppe; Vinci, Enzo; Franceschi, Giorgio; Garofalo, Raffaele

    2008-02-01

    Different clinical tests have been suggested in the literature as significant indicators of anterior shoulder instability. Sometimes patients with recurrent anterior shoulder instability may show some muscular guarding thus making the evaluation of specific clinical tests very difficult. These patients may also report a medical history with posterior shoulder pain that can be also elicited during some clinical manoeuvres. From September 2005 to September 2006 we prospectively studied patients who underwent an arthroscopic anterior capsuloplasty. Shoulder clinical examination was performed including anterior shoulder instability tests (drawer, apprehension and relocation tests). Furthermore the exam was focused on the presence of scapular dyskinesia and posterior shoulder pain. The patients were also evaluated with ASES, Rowe, SST (Simple Shoulder Test), Constant and UCLA (University of California at Los Angeles) scoring system preoperatively and at the latest follow-up time. In the period of this study we observed 16 patients treated for anterior gleno-humeral arthroscopic stabilisation, who preoperatively complained also of a posterior scapular pain. The pain was referred at the level of lower trapezium and upper rhomboids tendon insertion on the medial border of the scapula. It was also reproducible upon local palpation by the examiner. Four of these patients also referred pain in the region of the insertion of the infraspinatus and teres minor. After arthroscopic stabilisation the shoulder was immobilised in a sling with the arm in the neutral rotation for a period of 4 weeks. A single physician supervised shoulder rehabilitation. After a mean time of 6.8 months of follow-up, all the shoulder scores were significantly improved and, moreover, at the same time the patients referred the disappearance of the posterior pain. Posterior scapular shoulder pain seems to be another complaint and sign that can be found in patients affected by anterior shoulder instability

  6. Shoulder pain

    Science.gov (United States)

    Pain - shoulder ... changes around the rotator cuff can cause shoulder pain. You may have pain when lifting the arm above your head or ... The most common cause of shoulder pain occurs when rotator cuff tendons ... The tendons become inflamed or damaged. This condition ...

  7. An Application of the Multivariate Linear Mixed Model to the Analysis of Shoulder Complexity in Breast Cancer Patients

    Directory of Open Access Journals (Sweden)

    Gholamreza Oskrochi

    2016-03-01

    Full Text Available In this study, four major muscles acting on the scapula were investigated in patients who had been treated in the last six years for unilateral carcinoma of the breast. Muscle activity was assessed by electromyography during abduction and adduction of the affected and unaffected arms. The main principal aim of the study was to compare shoulder muscle activity in the affected and unaffected shoulder during elevation of the arm. A multivariate linear mixed model was introduced and applied to address the principal aims. The result of fitting this model to the data shows a huge improvement as compared to the alternatives.

  8. Effects of push-up exercise on shoulder stabilizer muscle activation according to the grip thickness of the push-up bar.

    Science.gov (United States)

    Jung, Jaemin; Cho, Woonik

    2015-09-01

    [Purpose] This study investigated the effects of bar thickness on shoulder stabilizer muscle activation during push-up exercise. [Subjects] Twenty-six healthy male adults in their twenties. [Methods] The study had four experimental conditions (grip thicknesses of 0%, 50%, 75%, and 100% of the subjects' hand size). Measurements were conducted from the start to the end of push-up for deltoid anterior fiber, deltoid posterior fiber, infraspinatus, serratus anterior, and pectoralis major muscle activation. [Results] The deltoid anterior fiber muscle activity was 4,852.6 ± 975.2 in the 0%, 5,787.3 ± 1,514.1 in the 50%, 5,635.3 ± 1,220.1 in the 75%, and 5,032.9 ± 841.0 in the 100% condition. The infraspinatus muscle activity was 1,877.2 ± 451.3 in the 0%, 2,310.9 ± 765.4 in the 50%, 2,353.6 ± 761.9 in the 75%, and 2,016.8 ± 347.7 in the 100% condition. The pectoralis major muscle activity was 1,675.8 ± 355.1 in the 0%, 2,365.5 ± 1,287.3 in the 50%, 2,125.3 ± 382.5 in the 75%, and 1,878.8 ± 419.7 in the 100% condition, showing significant differences respectively. [Conclusion] The use of push-up bars with different thicknesses customized to personal characteristics, rather than the conventional standard, could be more effective for training and rehabilitation. PMID:26504343

  9. COMPARING EFFECT OF SHOULDER CUFF SUPPORT VERSUS SHOULDER STRAPPING IN PREVENTING POST STROKE SHOULDER PAIN

    Directory of Open Access Journals (Sweden)

    Parvinder kaur

    2013-10-01

    Full Text Available Aims and Objectives:The aim of research is to compare the effectiveness of shoulder cuff support versusshoulder strapping.Methodology:A sample of 20 strokesubjects was recruited for the study. The subjectwere randomly dividedin to 2 groups Group A ( shoulder cuff group and Group B (shoulder strapping group.Pre test assessment was done by Visual analogue scale & pain free range of motion to 900degree. A receivedshoulder cuff and group B received shoulder strapping in their rehabilitation protocol. Both groupwere treatedfor 7 days . on seventh day reading were taken for both groups.Results:Development of pain and restrictionof shoulder range is significantly less in group A- shoulder cuff group as compare to group B -shoulder strappinggroup on 7thtreatment day.Discussion:Use of shoulder cuff support with stroke patients particularly in theearly flaccid stage useful in preventing shoulder pain. Support of the flaccid shoulder early in management canreduce the incidence of subluxation.Strapping would not ensure support to the soft tissueall thetime, and itmay encourage some abnormal synergy pattern.Conclusions:Shoulder cuff support significantly decrease theonsetand intensity of pain in affected upper extremity and prevent restriction of range of motion .ascomparedto shoulder strapping.

  10. Axonal degeneration affects muscle density in older men and women.

    Science.gov (United States)

    Lauretani, Fulvio; Bandinelli, Stefania; Bartali, Benedetta; Di Iorio, Angelo; Giacomini, Vittoria; Corsi, Anna Maria; Guralnik, Jack M; Ferrucci, Luigi

    2006-08-01

    Using data from InCHIANTI, a prospective population-based survey of older persons, we examined the relationship of peroneal nerve conduction velocity (NCV, a measure of nerve myelination) and compound muscle action potential (CMAP, a measure of axonal degeneration) with calf muscle mass and density, two complementary measures of sarcopenia. NCV and CMAP were assessed by surface electroneurography of the right peroneal nerve conducted in 1162 participants, 515 men and 647 women, age 21-96 years, free of major neurological diseases. Cross-sectional muscle area and calf muscle density were measured using peripheral quantitative computerized tomography (pQCT). Both nerve and muscle parameters declined with age although in most cases the decline was not linear. In both sexes, CMAP, but not NCV, was independently and significantly associated with calf muscle density. These findings suggest that intrinsic changes in the muscle tissue are partially caused by a reduction in the number of motor axons. PMID:16085338

  11. Posttraumatic focal dystonia of the shoulder.

    Science.gov (United States)

    Vasileiadis, Georgios I; Sakellariou, Vasileios I; Papagelopoulos, Panayiotis J; Zoubos, Aristeides B

    2012-06-01

    Focal posttraumatic shoulder dystonia is a rare and not easily identifiable entity. Its true pathophysiologic nature, predisposing factors, and disease course remain debatable.This article describes a rare case of a 40-year-old man with late symptoms of focal shoulder dystonia after peripheral trauma of his left shoulder girdle. The shoulder was indirectly injured from the impact of a fall off his motorbike 3 years earlier. He was referred to the authors' institution because remarkable reduction of arm abduction, muscle spasms, and circumscribed hypertrophy of the trapezius muscle were noted while his head and neck were in neutral position and had a full range of motion. The left shoulder had a fixed elevated posture compared with the contralateral shoulder. A continuous burning pain was localized over the area of the hypertrophied trapezius muscle, radiating to the ipsilateral side of the head and neck. Dystonic movements of the trapezius, rhomboid, and supraspinatus muscles were observed. The abduction of the shoulder was significantly decreased, and any repetitive effort for arm abduction induced an exaggeration of his movement disorder, leading to a more pronounced shoulder elevation.Plain radiographs and magnetic resonance imaging of the left shoulder revealed a suprascapular tendinitis with no other abnormalities. Repeated needle electromyography of the left trapezius muscle and neurography of the accessory nerve on both sides were normal. Injections of botulinum toxin A were effective in the resolution of muscle hypertrophy and abnormal posture. PMID:22691679

  12. Strenght training and anabolic steroids : a comparative study of the trapezius, a shoulder muscle and the vastus lateralis, a thigh muscle, of strength trained athletes

    OpenAIRE

    Eriksson, Anders

    2006-01-01

    Strength training is widely used to increase performance in sports with high physical demands. The use of drugs such as anabolic steroids among athletes is a wellknown phenomenon, and the effects of these drugs on physical performance documented. The studies presented in this thesis focused on the mechanisms of muscle fiber hypertrophy in the vastus lateralis and the trapezius muscles of strength trained elite athletes. The main hypothesis was that the muscle adaptations to strength training ...

  13. Extravasation of joint fluid into the mediastinum and the deep neck during atthoscopic shoulder surgery

    International Nuclear Information System (INIS)

    Extravasation of shoulder joint fluid into the surrounding muscles during shoulder arthroscopic surgery is common and inevitable. Here, we report a case of massive extravasation of shoulder joint fluid leading to mediastinal and retrotracheal effusion after arthroscopic shoulder surgery. We will discuss the anatomical basis of fluid leakage from the shoulder to the mediastinum and to the deep neck on CT.

  14. Shoulder Impingement Treatment

    Science.gov (United States)

    ... Issues Listen Español Text Size Email Print Share Shoulder Impingement Treatment Page Content Article Body Shoulder impingement ... goals for shoulder impingement. Phases and Goals of Shoulder Impingement Treatment Treating shoulder impingement involves limiting activities ...

  15. Shoulder CT scan

    Science.gov (United States)

    CAT scan - shoulder; Computed axial tomography scan - shoulder; Computed tomography scan - shoulder; CT scan - shoulder ... stopping.) A computer creates separate images of the shoulder area. These are called slices. These images can ...

  16. Painful shoulder

    Directory of Open Access Journals (Sweden)

    Benno Ejnismann

    2008-03-01

    Full Text Available Many factors can be involved in the painful shoulder. Beyond articularcauses other pathologies such as artrosis, periarticular diseases as rotadorcuff tears, long head of the biceps tendinitis, adhesive capsulitis, calcifyingtendinitis, degenerative arthritis of the acromioclavicular joint, cervicalradiculopathy and nervous injuries can cause pain in the shoulder.

  17. Shoulder Arthroscopy

    Science.gov (United States)

    ... inflamed tissue or loose cartilage • Repair for recurrent shoulder dislocation Less common procedures such as nerve release, fracture repair, and cyst excision can also be performed using an arthroscope. ... as shoulder replacement, still require open surgery with more extensive ...

  18. Shoulder instability

    International Nuclear Information System (INIS)

    In the shoulder, the advantages of range of motion are traded for the disadvantages of vulnerability to injury and the development of instability. Shoulder instability and the lesion it produces represent one of the main causes of shoulder discomfort and pain. Shoulder instability is defined as a symptomatic abnormal motion of the humeral head relative to the glenoid during active shoulder motion. Glenohumeral instabilities are classified according to their causative factors as the pathogenesis of instability plays an important role with respect to treatment options: instabilities are classified in traumatic and atraumatic instabilities as part of a multidirectional instability syndrome, and in microtraumatic instabilities. Plain radiographs ('trauma series') are performed to document shoulder dislocation and its successful reposition. Direct MR arthrography is the most important imaging modality for delineation the different injury patterns on the labral-ligamentous complex and bony structures. Monocontrast CT-arthrography with use of multidetector CT scanners may be an alternative imaging modality, however, regarding the younger patient age, MR imaging should be preferred in the diagnostic work-up of shoulder instabilities. (orig.)

  19. The callipyge mutation and other genes that affect muscle hypertrophy in sheep

    Directory of Open Access Journals (Sweden)

    Cockett Noelle E

    2005-12-01

    Full Text Available Abstract Genetic strategies to improve the profitability of sheep operations have generally focused on traits for reproduction. However, natural mutations exist in sheep that affect muscle growth and development, and the exploitation of these mutations in breeding strategies has the potential to significantly improve lamb-meat quality. The best-documented mutation for muscle development in sheep is callipyge (CLPG, which causes a postnatal muscle hypertrophy that is localized to the pelvic limbs and loin. Enhanced skeletal muscle growth is also observed in animals with the Carwell (or rib-eye muscling mutation, and a double-muscling phenotype has been documented for animals of the Texel sheep breed. However, the actual mutations responsible for these muscular hypertrophy phenotypes in sheep have yet to be identified, and further characterization of the genetic basis for these phenotypes will provide insight into the biological control of muscle growth and body composition.

  20. Concentric resistance training increases muscle strength without affecting microcirculation

    Energy Technology Data Exchange (ETDEWEB)

    Weber, Marc-Andre [Department of Diagnostic and Interventional Radiology, University of Heidelberg, Heidelberg (Germany)], E-mail: MarcAndre.Weber@med.uni-heidelberg.de; Hildebrandt, Wulf [Immunochemistry, German Cancer Research Center (dkfz), Heidelberg (Germany); Schroeder, Leif [Medical Physics in Radiology, German Cancer Research Center (dkfz), Heidelberg (Germany); Kinscherf, Ralf [Department of Anatomy and Developmental Biology, University of Heidelberg, Heidelberg (Germany); Krix, Martin [Radiology, German Cancer Research Center (dkfz), Heidelberg (Germany); Bachert, Peter [Medical Physics in Radiology, German Cancer Research Center (dkfz), Heidelberg (Germany); Delorme, Stefan; Essig, Marco [Radiology, German Cancer Research Center (dkfz), Heidelberg (Germany); Kauczor, Hans-Ulrich [Department of Diagnostic and Interventional Radiology, University of Heidelberg, Heidelberg (Germany); Krakowski-Roosen, Holger [National Center for Tumor Diseases (NCT), Heidelberg (Germany)

    2010-03-15

    Purpose: While the evidence is conclusive regarding the positive effects of endurance training, there is still some controversy regarding the effects of resistance training on muscular capillarity. Thus, the purpose was to assess whether resistance strength training influences resting skeletal muscle microcirculation in vivo. Materials and methods: Thirty-nine middle-aged subjects (15 female, 24 male; mean age, 54 {+-} 9 years) were trained twice a week on an isokinetic system (altogether 16 sessions lasting 50 min, intensity 75% of maximum isokinetic and isometric force of knee flexors and extensors). To evaluate success of training, cross-sectional area (CSA) of the quadriceps femoris muscle and its isokinetic and isometric force were quantified. Muscular capillarization was measured in biopsies of the vastus lateralis muscle. In vivo, muscular energy and lipid metabolites were quantified by magnetic resonance spectroscopy and parameters of muscular microcirculation, such as local blood volume, blood flow and velocity, by contrast-enhanced ultrasound analyzing replenishment kinetics. Results: The significant (P < 0.001) increase in CSA (60 {+-} 16 before vs. 64 {+-} 15 cm{sup 2} after training) and in absolute muscle strength (isometric, 146 {+-} 44 vs. 174 {+-} 50 Nm; isokinetic, 151 {+-} 53 vs. 174 {+-} 62 Nm) demonstrated successful training. Neither capillary density ex vivo (351 {+-} 75 vs. 326 {+-} 62) nor ultrasonographic parameters of resting muscle perfusion were significantly different (blood flow, 1.2 {+-} 1.2 vs. 1.1 {+-} 1.1 ml/min/100 g; blood flow velocity, 0.49 {+-} 0.44 vs. 0.52 {+-} 0.74 mm s{sup -1}). Also, the intensities of high-energy phosphates phosphocreatine and {beta}-adenosintriphosphate were not different after training within the skeletal muscle at rest ({beta}-ATP/phosphocreatine, 0.29 {+-} 0.06 vs. 0.28 {+-} 0.04). Conclusion: The significant increase in muscle size and strength in response to concentric isokinetic and isometric

  1. Concentric resistance training increases muscle strength without affecting microcirculation

    International Nuclear Information System (INIS)

    Purpose: While the evidence is conclusive regarding the positive effects of endurance training, there is still some controversy regarding the effects of resistance training on muscular capillarity. Thus, the purpose was to assess whether resistance strength training influences resting skeletal muscle microcirculation in vivo. Materials and methods: Thirty-nine middle-aged subjects (15 female, 24 male; mean age, 54 ± 9 years) were trained twice a week on an isokinetic system (altogether 16 sessions lasting 50 min, intensity 75% of maximum isokinetic and isometric force of knee flexors and extensors). To evaluate success of training, cross-sectional area (CSA) of the quadriceps femoris muscle and its isokinetic and isometric force were quantified. Muscular capillarization was measured in biopsies of the vastus lateralis muscle. In vivo, muscular energy and lipid metabolites were quantified by magnetic resonance spectroscopy and parameters of muscular microcirculation, such as local blood volume, blood flow and velocity, by contrast-enhanced ultrasound analyzing replenishment kinetics. Results: The significant (P 2 after training) and in absolute muscle strength (isometric, 146 ± 44 vs. 174 ± 50 Nm; isokinetic, 151 ± 53 vs. 174 ± 62 Nm) demonstrated successful training. Neither capillary density ex vivo (351 ± 75 vs. 326 ± 62) nor ultrasonographic parameters of resting muscle perfusion were significantly different (blood flow, 1.2 ± 1.2 vs. 1.1 ± 1.1 ml/min/100 g; blood flow velocity, 0.49 ± 0.44 vs. 0.52 ± 0.74 mm s-1). Also, the intensities of high-energy phosphates phosphocreatine and β-adenosintriphosphate were not different after training within the skeletal muscle at rest (β-ATP/phosphocreatine, 0.29 ± 0.06 vs. 0.28 ± 0.04). Conclusion: The significant increase in muscle size and strength in response to concentric isokinetic and isometric resistance training occurs without an increase in the in vivo microcirculation of the skeletal muscles at rest.

  2. The callipyge mutation and other genes that affect muscle hypertrophy in sheep

    OpenAIRE

    Cockett Noelle E; Smit Maria A; Bidwell Christopher A; Segers Karin; Hadfield Tracy L; Snowder Gary D; Georges Michel; Charlier Carole

    2005-01-01

    Abstract Genetic strategies to improve the profitability of sheep operations have generally focused on traits for reproduction. However, natural mutations exist in sheep that affect muscle growth and development, and the exploitation of these mutations in breeding strategies has the potential to significantly improve lamb-meat quality. The best-documented mutation for muscle development in sheep is callipyge (CLPG), which causes a postnatal muscle hypertrophy that is localized to the pelvic l...

  3. Shoulder replacement

    Science.gov (United States)

    ... are able to return to sports such as golf, swimming, gardening, bowling, and others. Your new shoulder ... important distinction for online health information and services. Learn more about A.D.A.M.'s editorial policy , ...

  4. Shoulder Problems

    Science.gov (United States)

    ... ibuprofen, for pain. No 11. Do you feel pain when you move your shoulder but there's no swelling or redness? Yes You may have BURSITIS or ROTATOR CUFF SYNDROME. Use an anti-inflammatory medicine, such as ibuprofen, ...

  5. Solitary cysticercosis affecting deltoid muscle: A rare entity

    OpenAIRE

    Geeta Purohit; Sarita Mohapatra; Sonam Sharma; Manorama Deb

    2015-01-01

    Cysticercosis is a common parasitic infection in developing countries involving the central nervous system (CNS), eye, skeletal muscle, and subcutaneous tissue. Solitary intramuscular cysticercosis without CNS involvement is a rare entity. Here, we present a case of solitary cysticercosis involving a rare muscular site without any neurologic or systemic manifestation.

  6. Solitary cysticercosis affecting deltoid muscle: A rare entity

    Directory of Open Access Journals (Sweden)

    Geeta Purohit

    2015-01-01

    Full Text Available Cysticercosis is a common parasitic infection in developing countries involving the central nervous system (CNS, eye, skeletal muscle, and subcutaneous tissue. Solitary intramuscular cysticercosis without CNS involvement is a rare entity. Here, we present a case of solitary cysticercosis involving a rare muscular site without any neurologic or systemic manifestation.

  7. Factors affecting isokinetic muscle strength before and after anterior cruciate ligament reconstruction.

    Science.gov (United States)

    Yüksel, Halil Yalçin; Erkan, Serkan; Uzun, Macit

    2011-06-01

    The purpose of this study was to evaluate the factors affecting muscle strength of ACL-deficient knees before and after ACL reconstruction. The study included 122 male patients who underwent primary ACL reconstruction with a bone-patellar tendon-bone autograft. Preoperative loss and change in muscle strength in both extensor and flexor muscle groups after ACL reconstruction were calculated separately at 60 degrees/sec and 180 degrees/sec angular velocities. We evaluated the effect of surgical delay on the preoperative deficit and on its change after surgery. Muscle strength change after ACL reconstruction was also evaluated in relation to patient compliance to treatment. The longer the delay of ACL reconstruction the more the muscle strength deficit of flexor and extensor muscles increased. In the ACL deficient knees with high strength deficit, improvement in muscle strength was higher after ACL reconstruction for both muscle groups. When delay of ACL reconstruction was short and the patient was compliant to treatment, flexor muscle strength recovery was early. Shortening the delay to reconstruction had a positive influence on muscle strength after ACL reconstruction when preoperative muscle strength deficit was high. PMID:21846002

  8. Lithium dampens neurotransmitter response in smooth muscle: relevance to action in affective illness.

    OpenAIRE

    Menkes, H A; Baraban, J M; Freed, A N; Snyder, S H

    1986-01-01

    Lithium, by inhibiting inositol phosphate metabolism, interferes with the phosphatidylinositol ("phosphoinositide") cycle, which is stimulated by numerous hormones and neurotransmitters. To examine the relevance of this action to neurotransmission, we evaluated effects of lithium treatment on smooth muscle responses to transmitters. In lithium-pretreated tracheal muscle, the relaxation following carbachol or histamine contractions is retarded. Lithium does not affect relaxation following cont...

  9. Modified trapezius transfer technique for restoration of shoulder abduction in brachial plexus injury

    Directory of Open Access Journals (Sweden)

    Singh Arun

    2007-01-01

    Full Text Available Aims and Objectives: Shoulder stability and restoration are very important in providing greater range of motion to the arm and forearm. When brachial plexus repair does not have the desired outcome and in patients with long standing denervation, the trapezius muscle is frequently used for transfer to restore the shoulder abduction and external rotation. We propose a modified simple technique for trapezius muscle transfer. Materials and Methods: From February 2004 to February 2006, eight patients with posttraumatic brachial plexus injury with insufficient shoulder abduction were treated by trapezius muscle transfer. All patients with brachial plexus palsy were posttraumatic, often resulted from motor cycle accidents. Before operation a full evaluation of muscle function in the affected arm was carried out. All patients were treated with trapezius muscle transfer performed by the modified technique. S-shaped incision from the anterior border of the trapezius just above the clavicle to the Deltoid up to its insertion was made. The accessory nerve and its branches to the trapezius were secured. The trapezius was dissected and detached from its insertion along with the periosteum and sutured to the insertion of the Deltoid muscle. Results: All patients had improved functions and were satisfied with the outcome. The average increase in active abduction of shoulder was from 13.7 degrees (0 to 35 degrees preoperatively to 116 degrees (45 to 180 degrees postoperatively and of shoulder flexion from 24.3 degrees (15 to 30 degrees to 107 degrees (90 to 180 degrees. Conclusion: The modified technique proposed here for trapezius transfer is safe, convenient, simple and reliable for restoration of shoulder abduction and stability with clear subjective benefits.

  10. Bankart Repair to Correct Shoulder Instability

    Medline Plus

    Full Text Available ... taking down any muscles in front of the shoulder, and I think yielding less pain for the patient pos-top, potentially less scar ... that he had an open shift. Now the shoulder is maybe too tight and leading to pain, but if you could talk about that issue ...

  11. Test-retest repeatability of strength capacity, aerobic power and pericranial tenderness of neck and shoulder muscles in children - relevant for tension-type headache

    Directory of Open Access Journals (Sweden)

    Tornøe B

    2013-08-01

    Full Text Available Birte Tornøe,1,2,5,6 Lars L Andersen,3 Jørgen H Skotte,3 Rigmor Jensen,4 Gunvor Gard,1 Liselotte Skov,2 Inger Hallström1 1Department of Health Sciences, Lund University, Scania, Sweden; 2Children's Headache Clinic, Department of Pediatrics, University of Copenhagen, Herlev Hospital, Herlev, Denmark; 3National Research Centre for the Working Environment, Copenhagen, Denmark; 4Danish Headache Center, Department of Neurology, University of Copenhagen, Glostrup Hospital, Glostrup, Denmark; 5Department of Physiotherapy and Occupational Therapy, University of Copenhagen, Glostrup Hospital, Glostrup, Denmark; 6Department of Physiotherapy, Medical Department, University of Copenhagen, Herlev Hospital, Herlev, Denmark Background: Frequent or chronic tension-type headache in children is a prevalent and debilitating condition for the child, often leading to medication overuse. To explore the relationship between physical factors and tension-type headache in children, the quality of repeated measures was examined. The aim of the present study was to determine the test-retest repeatability of parameters determining isometric neck and shoulder strength and stability, aerobic power, and pericranial tenderness in children. Methods: Twenty-five healthy children, 9 to 18 years of age, participated in test-retest procedures within a 1-week interval. A computerized padded force transducer was used for testing. The tests included the isometric maximal voluntary contraction and force steadiness of neck flexion and extension, and the isometric maximal voluntary contraction and rate of force of the dominant shoulder. Pericranial tenderness was recorded by means of standardized manual palpation, and a submaximal cycle ergometer test predicted maximal oxygen uptake (VO2 max. The measurements were evaluated in steps, using the intraclass correlation coefficient (ICC; changes in the mean between the two test occasions; the levels of agreement, visualized in Bland

  12. Shoulder surgery - discharge

    Science.gov (United States)

    SLAP repair - discharge; Acromioplasty - discharge; Bankart - discharge; Shoulder repair - discharge; Shoulder arthroscopy - discharge ... You had shoulder surgery to repair the tissues inside or around your shoulder joint. The surgeon may have used a tiny ...

  13. Bankart Repair to Correct Shoulder Instability

    Medline Plus

    Full Text Available ... stronger; often four, six, eight weeks of a strengthening program for those muscles behind the shoulder to support ... a harness type brace may, along with a strengthening program, help to try to keep that ball back ...

  14. Bankart Repair to Correct Shoulder Instability

    Medline Plus

    Full Text Available ... By strengthening the rotator cuff muscles can this lead to shoulder ligaments that were loose to self- ... patient and her experience. And it's going to lead well into what we've had a lot ...

  15. The primer for sports medicine professionals on imaging: the shoulder.

    Science.gov (United States)

    Farshad-Amacker, Nadja A; Jain Palrecha, Sapna; Farshad, Mazda

    2013-01-01

    Because of its inherent superior soft tissue contrast and lack of ionizing radiation, magnetic resonance imaging (MRI) is highly suited to study the complex anatomy of the shoulder joint, particularly when assessing the relatively high incidence of shoulder injuries in young, athletic patients. This review aims to serve as a primer for understanding shoulder MRI in an algorithmical approach, including MRI protocol and technique, normal anatomy and anatomical variations of the shoulder, pathologic conditions of the rotator cuff tendons and muscles, the long head of the biceps tendon, shoulder impingement, labral and glenohumeral ligament pathology, MR findings in shoulder instability, adhesive capsulitis, and osteoarthritis. PMID:24381700

  16. Shoulder injuries in soccer goalkeepers: review and development of a FIFA 11+ shoulder injury prevention program.

    Science.gov (United States)

    Ejnisman, Benno; Barbosa, Gisele; Andreoli, Carlos V; de Castro Pochini, A; Lobo, Thiago; Zogaib, Rodrigo; Cohen, Moises; Bizzini, Mario; Dvorak, Jiri

    2016-01-01

    In the last years, shoulder injuries have represented an increasing health problem in soccer players. The goalkeepers are more exposed to shoulder disorders than other field players. Injury prevention exercises for upper limbs were cited in few studies involving throwing athletes, but we know that goalkeepers need a specific program. The purpose of this study is to describe the development of an adapted Fédération Internationale de Football Association (FIFA) 11+ program, namely the FIFA 11+ shoulder, which targets the prevention of shoulder injuries in soccer goalkeepers. The FIFA 11+ shoulder program is structured into three parts: general warming-up exercises, exercises to improve strength and balance of the shoulder, elbow, wrist, and finger muscles, and advanced exercises for core stability and muscle control. The exercises were selected based on recommendations from studies demonstrating high electromyographic activity. PMID:27563262

  17. Listening to music affects diurnal variation in muscle power output.

    Science.gov (United States)

    Chtourou, H; Chaouachi, A; Hammouda, O; Chamari, K; Souissi, N

    2012-01-01

    The purpose of this investigation was to assess the effects of listening to music while warming-up on the diurnal variations of power output during the Wingate test. 12 physical education students underwent four Wingate tests at 07:00 and 17:00 h, after 10 min of warm-up with and without listening to music. The warm-up consisted of 10 min of pedalling at a constant pace of 60 rpm against a light load of 1 kg. During the Wingate test, peak and mean power were measured. The main finding was that peak and mean power improved from morning to afternoon after no music warm-up (pmusic warm-up. Moreover, peak and mean power were significantly higher after music than no music warm-up during the two times of testing. Thus, as it is a legal method and an additional aid, music should be used during warm-up before performing activities requiring powerful lower limbs' muscles contractions, especially in the morning competitive events. PMID:22134883

  18. Frozen shoulder: a sympathetic dystrophy?

    Science.gov (United States)

    Müller, L P; Müller, L A; Happ, J; Kerschbaumer, F

    2000-01-01

    Diagnostic and clinical features of the frozen shoulder syndrome and the Sudeck syndrome are similar in many aspects. Radioisotope bone scan shows an increased uptake in affected areas in both diseases, while native radiographs show a progressive demineralisation. Measurement of bone mineral density (BMD) by quantitative digital radiography objectified these local decalcification processes in an early stage of the frozen shoulder syndrome; 10 of 12 patients with primary frozen shoulder had BMD decreases greater 21% in the humeral head of the affected shoulder compared to the non-affected side. In the immobilised control group with degenerative changes of the rotator cuff, calcifying tendinitis and shoulder instability (n = 12) and in the group of healthy probands (n = 20), the difference between the affected and non-affected side (left and right humerus of the healthy probands) was only more than 21% in one case each. There are several references in the literature that assume frozen shoulder to be an algoneurodystrophic process; our observations support this hypothesis, possibly leading to earlier diagnoses and extended therapeutic management. PMID:10653111

  19. A Shoulder Health Survey

    OpenAIRE

    Kane, Steven; Conus, Sean; Haltom, Douglas; Hirshorn, Kurt; Pak, Youngju; Vigdorchik, Jonathan

    2010-01-01

    Shoulder pain and loss of shoulder function are common complaints reported by a variety of patients. This article suggests that shoulder pain and loss of function are directly proportional to lifestyle choices, including smoking and obesity. To investigate possible relationships between lifestyle choices and shoulder health, the authors conducted an online survey combining the Oxford Shoulder Questionnaire, the Shoulder Rating Questionnaire, and the Subjective Shoulder Rating System. Data wer...

  20. MRI of the posttraumatic shoulder

    International Nuclear Information System (INIS)

    functional discomfort during the joint loading. Compression on the rotator cuff from the overlying acromion and the subsequent tissue reaction in the subacromial bursa causes suffering tendons of these muscles. Unrated its diagnostic leads to deepen the ‘subacromial conflict’ and reach rotator cuff initially partial and later progressed. The shoulder stiffness is a condition in which the passive motion restriction is combined with pain in their final phase as well as during sleep. This also affects the active movements which are also reduced. ‘The shoulder hardening’ is at the organic component expense and it must be distinguished from the functional disorders such as muscle contracture and ‘subacromial conflict’. Restoration of work capacity in patients with idiopathic ‘frozen shoulder’ is faster than in post-traumatic shoulder. Diagnostic estimated joint capsule fibrosis more quickly gives a way to the treatment, which shortens the patient’s suffering. MRI imaging is a method of choice for the diagnosis of these conditions. MRI shows not only broken integrity of the rotator cuff tendons, but also the fluid in the subacromial bursa, which means that, must have a lesion. MRI provides information about fatty degeneration of the tendon. MRI registers the distance of the torn tendon retraction, the rupture size, may advise the surgeon on its mobility, and hence the expected forecast. However in the impingement indicative are only local areas with increased signal on T 2 images and data about severe osteophytosis in the area of the acromioclavicular joint. Outlined are the areas of present calcification in the subacromial bursa and, what is more important for the process of treatment, - their density. In shoulder instability MRI demonstrates the presence of lesions type Bankart, partial rotator cuff lesions, lesions of the ligament apparatus in combination with SLAP lesions, lesions of the posterior labrum and refers to the type of instability and the choice of

  1. Humeral external rotation handling by using the Bobath concept approach affects trunk extensor muscles electromyography in children with cerebral palsy.

    Science.gov (United States)

    Grazziotin Dos Santos, C; Pagnussat, Aline S; Simon, A S; Py, Rodrigo; Pinho, Alexandre Severo do; Wagner, Mário B

    2014-10-20

    This study aimed to investigate the electromyographic activity of cervical and trunk extensors muscles in children with cerebral palsy during two handlings according to the Bobath concept. A crossover trial involving 40 spastic diplegic children was conducted. Electromyography (EMG) was used to measure muscular activity at sitting position (SP), during shoulder internal rotation (IR) and shoulder external rotation (ER) handlings, which were performed using the elbow joint as key point of control. Muscle recordings were performed at the fourth cervical (C4) and at the tenth thoracic (T10) vertebral levels. The Gross Motor Function Classification System (GMFCS) was used to assess whether muscle activity would vary according to different levels of severity. Humeral ER handling induced an increase on EMG signal of trunk extensor muscles at the C4 (P=0.007) and T10 (P<0.001) vertebral levels. No significant effects were observed between SP and humeral IR handling at C4 level; However at T10 region, humeral IR handling induced an increase of EMG signal (P=0.019). Humeral ER resulted in an increase of EMG signal at both levels, suggesting increase of extensor muscle activation. Furthermore, the humeral ER handling caused different responses on EMG signal at T10 vertebra level, according to the GMFCS classification (P=0.017). In summary, an increase of EMG signal was observed during ER handling in both evaluated levels, suggesting an increase of muscle activation. These results indicate that humeral ER handling can be used for diplegic CP children rehabilitation to facilitate cervical and trunk extensor muscles activity in a GMFCS level-dependent manner. PMID:25462474

  2. Shoulder pain

    OpenAIRE

    Dorinson, S. Malvern

    2010-01-01

    “Topics in Primary Care Medicine” presents articles on common diagnostic or therapeutic problems (such as dizziness, pruritus, insomnia, shoulder pain and urinary tract infections) encountered in primary care practice that generally do not fall into well-defined subspecialty areas and are rarely discussed thoroughly in medical school, house staff training, textbooks and journals. Often the pathophysiology is poorly understood and clinical trials to assess the effectiveness of diagnostic tests...

  3. Limitation of motion and shoulder disabilities in patients with cardiac implantable electronic devices.

    Science.gov (United States)

    Findikoglu, Gulin; Yildiz, Bekir S; Sanlialp, Musa; Alihanoglu, Yusuf I; Kilic, Ismail D; Evregul, Harun; Senol, Hande

    2015-12-01

    The aim of this study is to investigate the presence of limitations in the shoulder range of motion (ROM) or the loss of upper extremity function on the affected side in patients with cardiac implantable electronic devices (CIEDs) with respect to the implantation time. Forty-nine patients (30 men and 19 women), mean age 64.84±11.18 years, who had been living with a CIED for less than 3 months were included in the short-term recipient (STR) group and 127 patients (85 men and 42 women), mean age 64.91±14.70 years, and with the device for longer than 3 months were included in the long-term recipients group. Shoulder ROMs were measured using a digital goniometer. The other arm was used as the control. The Constant-Murler Score, Shoulder Pain Disability Index, and Shoulder Disability Questionnaire were used to assess the functional status. Limitations of ROM for flexion, abduction, and internal rotation were found to be significantly lower in the arm on the side of CIED compared with the control arm. Significant differences in shoulder flexion, abduction, and external rotation in STRs were found compared with long-term recipient (P<0.05). However, the functional comparison of groups by the Constant-Murler Score was not significant. A low to moderate amount of shoulder disability measured by Shoulder Pain Disability Index and Shoulder Disability Questionnaire was found in patients with CIEDs, which was more prominent in STRs (P<0.05). Pain, association of CIED with pectoral muscles, a possible subtle ongoing capsular pathology, and avoidance behaviors of patients to minimize the risk of lead dislodgement might be related to restriction of motion and function in the shoulder joint in patients with CIEDs. PMID:26164799

  4. Muscle strength in myasthenia gravis

    DEFF Research Database (Denmark)

    Cejvanovic, S; Vissing, J

    2014-01-01

    related to disease duration or gender. The aim of this study was to quantify the strength of patients with MG and investigate whether it is related to disease duration. METHODS: Eight muscle groups were tested by manual muscle testing and with a hand-held dynamometer in 38 patients with generalized MG and...... 37 healthy age- and gender-matched controls. The disease duration was recorded and compared with strength measures. RESULTS: On average, muscle strength was decreased by 28% compared with controls (P<0.01). Repeated strength measures in individual patients did not differ, suggesting that the muscle...... force reported was not subject to fatigue, but reflected fixed weakness. The male patients showed a greater reduction in muscle force in all eight muscle groups than women with MG (60% vs 77% of normal, P<0.05). In both men and women with MG, strength in shoulder abductors was most affected (51% vs 62...

  5. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... by almost ten years, is shoulders. So by definition, the average shoulder-replacement patient is almost ten ... DOUGLAS BOARDMAN III, MD: Exactly. Choices -- selection of primary versus reverse shoulder arthroplasty. 00:51:24 GERALD ...

  6. Dislocated shoulder - aftercare

    Science.gov (United States)

    Shoulder dislocation - aftercare; Shoulder subluxation - aftercare; Shoulder reduction - aftercare ... Horn AE, Ufberg JW. Management of common dislocations. In: ... Extremity 6th ed. Philadelphia, PA: ElsevierMosby; 2011:chap 92.

  7. Shoulder separation - aftercare

    Science.gov (United States)

    Separated shoulder - aftercare; Acromioclavicular joint separation - aftercare; A/C separation - aftercare ... Shoulder separation is not an injury to the main shoulder joint itself. It is an injury to ...

  8. Bilateral anterior shoulder dislocation

    OpenAIRE

    Meena, Sanjay; Saini, Pramod; Singh, Vivek; Kumar, Ramakant; Trikha, Vivek

    2013-01-01

    Shoulder dislocations are the most common major joint dislocations encountered in the emergency departments. Bilateral shoulder dislocations are rare and of these, bilateral posterior shoulder dislocations are more prevalent than bilateral anterior shoulder dislocations. Bilateral anterior shoulder dislocation is very rare. We present a case of 24-year-old male who sustained bilateral anterior shoulder dislocation following minor trauma, with associated greater tuberosity fracture on one side...

  9. Milwaukee shoulder syndrome.

    OpenAIRE

    Somashekar SA

    1991-01-01

    Milwaukee shoulder syndrome or rapid destructive arthritis of the shoulder is a very rare rheumatological condition characterized by the deposition of hydroxyapatite crystals. The figure 1 shows the shoulder image of a 67-year-old female with a history of bilateral shoulder pain and swelling since 2 years and knee pain since 6 months. Physical examination revealed restriction in shoulder movements. No neurological deficit was reported. X-ray of the right shoulder indicated rotator cuff disrup...

  10. MeCP2 Affects Skeletal Muscle Growth and Morphology through Non Cell-Autonomous Mechanisms.

    Directory of Open Access Journals (Sweden)

    Valentina Conti

    Full Text Available Rett syndrome (RTT is an autism spectrum disorder mainly caused by mutations in the X-linked MECP2 gene and affecting roughly 1 out of 10.000 born girls. Symptoms range in severity and include stereotypical movement, lack of spoken language, seizures, ataxia and severe intellectual disability. Notably, muscle tone is generally abnormal in RTT girls and women and the Mecp2-null mouse model constitutively reflects this disease feature. We hypothesized that MeCP2 in muscle might physiologically contribute to its development and/or homeostasis, and conversely its defects in RTT might alter the tissue integrity or function. We show here that a disorganized architecture, with hypotrophic fibres and tissue fibrosis, characterizes skeletal muscles retrieved from Mecp2-null mice. Alterations of the IGF-1/Akt/mTOR pathway accompany the muscle phenotype. A conditional mouse model selectively depleted of Mecp2 in skeletal muscles is characterized by healthy muscles that are morphologically and molecularly indistinguishable from those of wild-type mice raising the possibility that hypotonia in RTT is mainly, if not exclusively, mediated by non-cell autonomous effects. Our results suggest that defects in paracrine/endocrine signaling and, in particular, in the GH/IGF axis appear as the major cause of the observed muscular defects. Remarkably, this is the first study describing the selective deletion of Mecp2 outside the brain. Similar future studies will permit to unambiguously define the direct impact of MeCP2 on tissue dysfunctions.

  11. Scapular and rotator cuff muscle activity during arm elevation: a review of normal function and alterations with shoulder impingement Atividade dos músculos escapulares e do manguito rotator durante a elevação do braço: uma revisão da função normal e das alterações na síndrome do impacto

    OpenAIRE

    V Phadke; PR Camargo; PM Ludewig

    2009-01-01

    OBJECTIVE: The purpose of this manuscript is to review current knowledge of how muscle activation and force production contribute to shoulder kinematics in healthy subjects and persons with shoulder impingement. RESULTS: The middle and lower serratus anterior muscles produce scapular upward rotation, posterior tilting, and external rotation. Upper trapezius produces clavicular elevation and retraction. The middle trapezius is primarily a medial stabilizer of the scapula. The lower trapezius a...

  12. Shoulder Injuries and Disorders

    Science.gov (United States)

    ... of many common problems. They include sprains, strains, dislocations, separations, tendinitis, bursitis, torn rotator cuffs, frozen shoulder, fractures and arthritis. Usually shoulder problems are treated ...

  13. Postoperative pectoral swelling after shoulder arthroscopy

    Science.gov (United States)

    ERCIN, ERSIN; BILGILI, MUSTAFA GOKHAN; ONES, HALIL NADIR; KURAL, CEMAL

    2015-01-01

    Fluid extravasation is possibly the most common complication of shoulder arthroscopy. Shoulder arthroscopy can lead to major increases in the compartment pressure of adjacent muscles and this phenomenon is significant when an infusion pump is used. This article describes a case of pectoral swelling due to fluid extravasation after shoulder arthroscopy. A 24-year-old male underwent an arthroscopic Bankart repair for recurrent shoulder dislocation. The surgery was performed in the beach chair position and lasted two hours. At the end of the procedure, the patient was found to have left pectoral swelling. A chest radiography showed no abnormality. Pectoral swelling due to fluid extravasation after shoulder arthroscopy has not previously been documented. PMID:26889473

  14. Physical, psychosocial, and individual risk factors for neck/shoulder pain with pressure tenderness in the muscles among workers performing monotonous, repetitive work

    DEFF Research Database (Denmark)

    Andersen, JH; Kaergaard, A.; Frost, P.;

    2002-01-01

    factors versus individual factors in the etiology of pain in the neck and/or shoulders. METHODS: Study participants were 3123 workers from 19 plants. Physical risk factors were evaluated via video observations, and psychosocial risk factors were assessed with the job content questionnaire. Other...

  15. Increased palpation tenderness and muscle strength deficit in the prediction of tendon hypertrophy in symptomatic unilateral shoulder tendinopathy: an ultrasonographic study

    DEFF Research Database (Denmark)

    Joensen, J.; Couppe, C.; Bjordal, J.M.

    2009-01-01

    Objective In asymptomatic, normal tendons, the difference in tendon thickness between sides is less than 15%. In this Study, three tests were used to examine differences between symptomatic and asymptomatic shoulders. Design Cross-sectional study. The three tests were performed in sequence. The o...

  16. Sex steroids do not affect muscle weight, oxidative metabolism or cytosolic androgen reception binding of functionally overloaded rat Plantaris muscles

    Science.gov (United States)

    Max, S. R.; Rance, N.

    1983-01-01

    The effects of sex steroids on muscle weight and oxidative capacity of rat planaris muscles subjected to functional overload by removal of synergistic muscles were investigated. Ten weeks after bilateral synergist removal, plantaris muscles were significantly hypertrophic compared with unoperated controls. After this period, the ability of the muscles to oxide three substrates of oxidative metabolism was assessed. Experimental procedures are discussed and results are presented herein. Results suggest a lack of beneficial effect of sex hormone status on the process of hypertrophy and on biochemical changes in overloaded muscle. Such findings are not consistent with the idea of synergistic effects of sex steroids and muscle usage.

  17. Floating shoulder

    Directory of Open Access Journals (Sweden)

    B. de Pablo Márquez

    2014-09-01

    Full Text Available La fractura concomitante de clavícula y escápula es una entidad poco frecuente que puede ser una de las causas de afectación del complejo suspensorio del hombro también denominado hombro flotante (floating shoulder. Se relaciona frecuentemente con traumatismos de alta energía. Presentamos un caso de esta patología en un paciente varón de 28 años que consultó por caída en bicicleta con contusión sobre hombro izquierdo. Se describen las diferentes opciones terapéuticas planteadas, las imágenes radiológicas y una revisión de la literatura.

  18. MRI of the pediatric shoulder: nontraumatic lesions

    International Nuclear Information System (INIS)

    Magnetic resonance imaging is an established technique for imaging the shoulder because it demonstrates clearly the articular surfaces, medullary canal and the extra-articular soft tissues which can be affected in shoulder disorders. The value of MR imaging in the evaluation of the traumatized shoulder has been described [1[; however, few cases of MR imaging in nontraumatic disorders in children have been reported. We reviewed the findings in 55 children undergoing MRI of the shoulder for nontraumatic conditions and included selected cases showing a broad range of imaging findings. (orig.). With 11 figs

  19. Kinematics of chiropteran shoulder girdle in flight.

    Science.gov (United States)

    Panyutina, A A; Kuznetsov, A N; Korzun, L P

    2013-03-01

    New data on the mechanisms of movements of the shoulder girdle and humerus of bats are described; potential mobility is compared to the movements actually used in flight. The study was performed on the basis of morphological and functional analysis of anatomical specimens of 15 species, high speed and high definition filming of two species and X-ray survey of Rousettus aegyptiacus flight. Our observations indicate that any excursions of the shoulder girdle in bats have relatively small input in the wing amplitude. Shoulder girdle movements resemble kinematics of a crank mechanism: clavicle plays the role of crank, and scapula-the role of connecting rod. Previously described osseous "locking mechanisms" in shoulder joint of advanced bats do not affect the movements, actually used in flight. The wing beats in bats are performed predominantly by movements of humerus relative to shoulder girdle, although these movements occupy the caudal-most sector of available shoulder mobility. PMID:23381941

  20. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... by almost ten years, is shoulders. So by definition, the average shoulder-replacement patient is almost ten ... Anatomic Total Shoulder surgery, which featured the latest innovation in shoulder surgery from DePuy Orthopedics. OR-Live ...

  1. Concept of healing of recurrent shoulder dislocation.

    Science.gov (United States)

    D'Angelo, Donato

    2014-01-01

    This paper presents the main surgical techniques applied in the treatment of anterior recurrent shoulder dislocation, aiming the achievement of the normality of articulate movements. This was obtained by combining distinct surgical procedures, which allowed the recovery of a complete functional capacity of the shoulder, without jeopardizing the normality of movement, something that has not been recorded in the case of the tense sutures of the surgical procedures of Putti-Platt, Bankart, Latarjet, Dickson-O'Dell and others. The careful review of the methods applied supports the conclusion that recurrent shoulder dislocation can be cured, since cure has been obtained in 97% of the treated cases. However, some degree of limitation in the shoulder movement has been observed in most of the treated cases. Our main goal was to achieve a complete shoulder functional recovery, by treating simultaneously all of the anatomical-pathological lesions, without considering the so-called essential lesions. The period of post-operatory immobilization only last for the healing of soft parts; this takes place in a position of neutral shoulder rotation, since the use of vascular bone graft eliminates the need for long time immobilization, due to the shoulder stabilization provided by rigid fixation of the coracoid at the glenoid edge, as in the Latarjet's technique. Our procedure, used since 1959, comprises the association of several techniques, which has permitted shoulder healing without movement limitation. That was because of the tension reduction in the sutures of the subescapularis, capsule, and coracobraquialis muscles. PMID:26229839

  2. Frozen shoulder--an algoneurodystrophic process?

    Science.gov (United States)

    Müller, L P; Rittmeister, M; John, J; Happ, J; Kerschbaumer, F

    1998-12-01

    The frozen shoulder syndrome and the Sudeck syndrome are clinically in many aspects similar. Radioisotope bone scan shows an increased uptake in the affected areas in both diseases, while standard radiographs show a progressive demineralization. With measurement of bone-mineral density by quantitative digital radiography these local decalcification processes were diagnosed in an early stage of the frozen shoulder syndrome: of 12 patients with primary frozen shoulder 10 had a bone-mineral density decrease of more than 21% in the humeral head of the affected shoulder compared to the unaffected side. In the control groups (n = 32) the difference between affected and unaffected side (left and right humerus of the healthy probands) was in only one case each above 21%. There are several indications in the literature assuming the frozen shoulder to be an algoneurodystrophic process. Our observation supports this hypothesis, and may possibly lead to earlier diagnosis and improved therapeutic management. PMID:9922549

  3. Ultrasonography of the equine shoulder

    International Nuclear Information System (INIS)

    Six horses with shoulder injuries were presented in this report with emphasis on the use of ultrasonography vs. radiography in diagnosis. The two imaging modalities represented valuable and complementary diagnostic procedures. Two horses had fracture fragments of the lateral humeral tuberosity, the accurate ultrasonographic findings encouraging clearer radiographic identification by oblique projections. In one horseultrasonography enabled more accurate localization of calcification within the supraspinatus muscle. In the remaining three cases ultrasonography visualized distension of the bicipital bursa due to aseptic bursitis, bursal hemorrhage, or associated with injury of the biceps brachii muscle and the underlying intermediate humeral tubercle, the bony involvement more clearly demonstrated radiographically

  4. Evaluating shoulder instability treatment

    OpenAIRE

    Linde, J. A.

    2016-01-01

    Shoulder instability common occurs. When treated nonoperatively, the resulting societal costs based on health care utilization and productivity losses are significant. Shoulder function can be evaluated using patient reported outcome measurements (PROMs). For shoulder instability, these include the Western Ontario Shoulder Instability index (WOSI) and the Oxford Shoulder Instability Score (OSIS). When translated and validated for the dutch population, both have good measurment properties. Sco...

  5. Different atrophy-hypertrophy transcription pathways in muscles affected by severe and mild spinal muscular atrophy

    Directory of Open Access Journals (Sweden)

    Millino Caterina

    2009-04-01

    Full Text Available Abstract Background Spinal muscular atrophy (SMA is a neurodegenerative disorder associated with mutations of the survival motor neuron gene SMN and is characterized by muscle weakness and atrophy caused by degeneration of spinal motor neurons. SMN has a role in neurons but its deficiency may have a direct effect on muscle tissue. Methods We applied microarray and quantitative real-time PCR to study at transcriptional level the effects of a defective SMN gene in skeletal muscles affected by the two forms of SMA: the most severe type I and the mild type III. Results The two forms of SMA generated distinct expression signatures: the SMA III muscle transcriptome is close to that found under normal conditions, whereas in SMA I there is strong alteration of gene expression. Genes implicated in signal transduction were up-regulated in SMA III whereas those of energy metabolism and muscle contraction were consistently down-regulated in SMA I. The expression pattern of gene networks involved in atrophy signaling was completed by qRT-PCR, showing that specific pathways are involved, namely IGF/PI3K/Akt, TNF-α/p38 MAPK and Ras/ERK pathways. Conclusion Our study suggests a different picture of atrophy pathways in each of the two forms of SMA. In particular, p38 may be the regulator of protein synthesis in SMA I. The SMA III profile appears as the result of the concurrent presence of atrophic and hypertrophic fibers. This more favorable condition might be due to the over-expression of MTOR that, given its role in the activation of protein synthesis, could lead to compensatory hypertrophy in SMA III muscle fibers.

  6. MRI of the shoulder

    Energy Technology Data Exchange (ETDEWEB)

    Vahlensieck, M.

    2000-02-01

    Shoulder imaging is one of the major applications in musculoskeletal MRI. In order to analyze the images it is important to keep informed about anatomical and pathological findings and publications. In this article MRI technique, anatomy and pathology is reviewed. Technical considerations about MR sequences and examination strategy are only shortly discussed with emphasis on turbo spin echo and short T1 inversion recovery imaging. Basic anatomy as well as recent findings, including macroscopic aspects of the supraspinatus fat pad, composition of the supraspinatus muscle belly, and variability of the glenohumeral ligaments or coracoid ligament, are presented. Basic pathological conditions are described in detail, e. g. instability particularly problems in differentiating the various subtypes of labral pathology. Rotator cuff diseases are elucidated with emphasis on some rarer entities such as subscapularis calcifying tendinitis, coracoid impingement, chronic bursitis producing the double-line sign, prominent coraco-acromial ligament and the impingement due to an inflamed os acromiale. (orig.)

  7. MRI of the shoulder

    International Nuclear Information System (INIS)

    Shoulder imaging is one of the major applications in musculoskeletal MRI. In order to analyze the images it is important to keep informed about anatomical and pathological findings and publications. In this article MRI technique, anatomy and pathology is reviewed. Technical considerations about MR sequences and examination strategy are only shortly discussed with emphasis on turbo spin echo and short T1 inversion recovery imaging. Basic anatomy as well as recent findings, including macroscopic aspects of the supraspinatus fat pad, composition of the supraspinatus muscle belly, and variability of the glenohumeral ligaments or coracoid ligament, are presented. Basic pathological conditions are described in detail, e. g. instability particularly problems in differentiating the various subtypes of labral pathology. Rotator cuff diseases are elucidated with emphasis on some rarer entities such as subscapularis calcifying tendinitis, coracoid impingement, chronic bursitis producing the double-line sign, prominent coraco-acromial ligament and the impingement due to an inflamed os acromiale. (orig.)

  8. Acute moderate elevation of TNF-{alpha} does not affect systemic and skeletal muscle protein turnover in healthy humans

    DEFF Research Database (Denmark)

    Petersen, Anne Marie; Plomgaard, Peter; Fischer, Christian P;

    2009-01-01

    Context: Skeletal muscle wasting has been associated with elevations in circulating inflammatory cytokines, in particular TNF-alpha. Objective: In this study, we investigated whether TNF-alpha affects human systemic and skeletal muscle protein turnover, via a 4 hours recombinant human TNF...... of either rhTNF-alpha (700 ng.m(-2).h(-1)) or 20% human albumin (Control) which was the vehicle of rhTNF-alpha. Systemic and skeletal muscle protein turnover were estimated by a combination of tracer dilution methodology (primed continuous infusion of L-[ring-(2)H5]phenylalanine and L-[(15)N...... with the phenylalanine 3-compartment model showed similar muscle synthesis, breakdown and net muscle degradation after 2 hours basal and after 4 hours Control or rhTNF-alpha infusion. Conclusion: This study is the first to show in humans that TNF-alpha does not affect systemic and skeletal muscle protein turnover, when...

  9. A Case of Simultaneous Bilateral Anterior Shoulder Dislocation

    OpenAIRE

    Patil, Mallanagouda N

    2013-01-01

    Introduction: Anterior dislocation of shoulder is commonest dislocation one encounters in day to day Orthopaedic practice. But bilateral shoulder dislocations are relatively uncommon frequently posterior and secondary to violent muscle contraction. Simultaneous bilateral anterior dislocations of shoulder following trauma is rare occurrence. Case Report: 35 year old male presented to emergency department with history fall by tripping on a stone (fall on outstretched hand). He complained of...

  10. The influence of various resistance loads on the ratio of activity of the external rotator muscles of the shoulder and the anterior gliding of the humeral head during external rotation exercise.

    Science.gov (United States)

    Jo, Marg-Eun; Lee, Seung-Min; Jang, Jun-Hyeok; Lee, Sang-Yeol

    2015-10-01

    [Purpose] To quantify the ratio of activation of the infraspinatus and posterior deltoid muscles and the anterior gliding motion of the humeral head during external rotation (ER) motions of the shoulder performed in prone position against different external resistance loads. [Subjects] Twenty healthy women between the ages of 20 and 30 years. [Methods] Activity ratio was quantified as the difference in the root mean square of the smoothed electromyography signal (EMG) of the posterior deltoid to the infraspinatus muscle, and anterior gliding pressure of the humeral head using a pressure biofeedback unit (PBU), for three resistance loads: 0, 1 and 2 kg. [Results] There was a significant correlation among all three variables (load, ratio, and pressure). Anterior gliding pressure correlated with the activity ratio, with activity of the posterior deltoid increasing with the magnitude of the resistance load. [Conclusion] There was a positive association between the magnitude of resistance load, activity of the posterior deltoid and anterior gliding pressure of the humeral head. The PBU could be used to facilitate the recruitment of the infraspinatus muscle at higher loads to improve glenohumeral joint stability during ER exercise against higher resistance. PMID:26644683

  11. Maternal and paternal genomes differentially affect myofibre characteristics and muscle weights of bovine fetuses at midgestation.

    Directory of Open Access Journals (Sweden)

    Ruidong Xiang

    Full Text Available Postnatal myofibre characteristics and muscle mass are largely determined during fetal development and may be significantly affected by epigenetic parent-of-origin effects. However, data on such effects in prenatal muscle development that could help understand unexplained variation in postnatal muscle traits are lacking. In a bovine model we studied effects of distinct maternal and paternal genomes, fetal sex, and non-genetic maternal effects on fetal myofibre characteristics and muscle mass. Data from 73 fetuses (Day153, 54% term of four genetic groups with purebred and reciprocal cross Angus and Brahman genetics were analyzed using general linear models. Parental genomes explained the greatest proportion of variation in myofibre size of Musculus semitendinosus (80-96% and in absolute and relative weights of M. supraspinatus, M. longissimus dorsi, M. quadriceps femoris and M. semimembranosus (82-89% and 56-93%, respectively. Paternal genome in interaction with maternal genome (P<0.05 explained most genetic variation in cross sectional area (CSA of fast myotubes (68%, while maternal genome alone explained most genetic variation in CSA of fast myofibres (93%, P<0.01. Furthermore, maternal genome independently (M. semimembranosus, 88%, P<0.0001 or in combination (M. supraspinatus, 82%; M. longissimus dorsi, 93%; M. quadriceps femoris, 86% with nested maternal weight effect (5-6%, P<0.05, was the predominant source of variation for absolute muscle weights. Effects of paternal genome on muscle mass decreased from thoracic to pelvic limb and accounted for all (M. supraspinatus, 97%, P<0.0001 or most (M. longissimus dorsi, 69%, P<0.0001; M. quadriceps femoris, 54%, P<0.001 genetic variation in relative weights. An interaction between maternal and paternal genomes (P<0.01 and effects of maternal weight (P<0.05 on expression of H19, a master regulator of an imprinted gene network, and negative correlations between H19 expression and fetal muscle mass (P

  12. Muscle Disorders

    Science.gov (United States)

    Your muscles help you move and help your body work. Different types of muscles have different jobs. There are many problems that can affect muscles. Muscle disorders can cause weakness, pain or even ...

  13. Local NSAID infusion does not affect protein synthesis and gene expression in human muscle after eccentric exercise

    DEFF Research Database (Denmark)

    Mikkelsen, U R; Schjerling, P.; Langberg, Henning;

    2011-01-01

    Unaccustomed exercise leads to satellite cell proliferation and increased skeletal muscle protein turnover. Several growth factors and cytokines may be involved in the adaptive responses. Non-steroidal anti-inflammatory drugs (NSAIDs) negatively affect muscle regeneration and adaptation in animal...

  14. UnconStrained ShoUlder arthroplasty

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    Objective: To evaluate the results of 36unconstrained shoulder arthroplasties. Methods: In the series, 24 total and 12 hemiarthroplasties of the shoulders were performed with unconstrained shoulder prostheses in 29 patients who suffered from glenohumeral degenerative arthritis, rheumatoid arthritis, avascular necrosis and proximal fracture of humerus, respectively. Follow-up averaged 6.2years. All patients were evaluated pre- and post-operatively using the rating system of the Society of American Shoulder and Elbow Surgeons which assesses the severity of pain,strength of muscles around shoulder, stability, range of motion and functional activities of daily living. Radiolucent line and migration of prostheses were observed postoperatively on X-rays. Results: Postoperatively, the rate of pain relief was 91.3%, and active range of motion increased by 47° inforward flexion, 43° in abduction , 30° in external rotation,and 4 segments in internal rotation. Preoperatively the average points of 6 functional activities patients could perform was 0.8, and postoperatively 3.1. On postoperative X-ray, proximal migration of the humerus was seen in 8 shoulders, 6 of which had either a torn or absent rotator cuff. Radiolucent lines were seen around 1humeral component and 9 glenoid components. Onehumeral and 2 glenoid components loosened. Conclusions: These results suggest that unconstrained shoulder arthroplasty is a satisfactory and safe technique.

  15. Shoulder injuries in soccer goalkeepers: review and development of a FIFA 11+ shoulder injury prevention program

    Directory of Open Access Journals (Sweden)

    Ejnisman B

    2016-08-01

    Full Text Available Benno Ejnisman,1 Gisele Barbosa,1 Carlos V Andreoli,1 A de Castro Pochini,1 Thiago Lobo,2 Rodrigo Zogaib,2 Moises Cohen,1 Mario Bizzini,3 Jiri Dvorak3 1Department of Orthopaedics, Federal University of São Paulo, 2Sports Medicine Department, Santos FC, São Paulo, Brazil; 3FIFA-Medical Assessment and Research Centre, Schulthess Clinic, Zurich, Switzerland Abstract: In the last years, shoulder injuries have represented an increasing health problem in soccer players. The goalkeepers are more exposed to shoulder disorders than other field players. Injury prevention exercises for upper limbs were cited in few studies involving throwing athletes, but we know that goalkeepers need a specific program. The purpose of this study is to describe the development of an adapted Fédération Internationale de Football Association (FIFA 11+ program, namely the FIFA 11+ shoulder, which targets the prevention of shoulder injuries in soccer goalkeepers. The FIFA 11+ shoulder program is structured into three parts: general warming-up exercises, exercises to improve strength and balance of the shoulder, elbow, wrist, and finger muscles, and advanced exercises for core stability and muscle control. The exercises were selected based on recommendations from studies demonstrating high electromyographic activity. Keywords: goalkeeper, shoulder, injury prevention, prevention program

  16. What Are Shoulder Problems?

    Science.gov (United States)

    ... tears are severe. Rotator Cuff Disease: Tendinitis and Bursitis In tendinitis of the shoulder, tendons become inflamed ( ... from being pinched by parts around the shoulder. Bursitis occurs when the bursa—a small fluid-filled ...

  17. Frozen shoulder - aftercare

    Science.gov (United States)

    ... shoulder level. Store food in cupboards, drawers, and refrigerator shelves that are between your waist and shoulder level. Get help with housecleaning, taking out the garbage, gardening, and other household tasks.

  18. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... 10 ANNOUNCER: DePuy Orthopedics is continually advancing the standard of orthopedic patient care. In a few moments, ... by almost ten years, is shoulders. So by definition, the average shoulder-replacement patient is almost ten ...

  19. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available GLOBAL AP ANATOMIC TOTAL SHOULDER SYSTEM METHODIST HOSPITAL PHILADELPHIA, PA April 17, 2008 00:00:10 ANNOUNCER: ... you'll be able to watch a live global AP anatomic total shoulder surgery from Methodist Hospital ...

  20. Reverse Shoulder Arthroplasty

    Medline Plus

    Full Text Available ... case of reverse shoulder arthroplasty for cuff deficient arthritis. You should be aware that I helped design ... in the last decade for cuff deficient shoulder arthritis in the United States. The indications are a ...

  1. The nerves around the shoulder

    International Nuclear Information System (INIS)

    Neuropathies of the shoulder are considered to be entrapment syndromes. They are relatively common, accounting for about 2% of cases of sport-related shoulder pain. Many instances involve suprascapular neuropathy, but the clinical diagnosis is often delayed because of nonspecific symptoms. Classically, EMG is the gold standard investigation but MRI currently reveals muscular abnormality in 50% of cases. Muscle edema, the most characteristic symptom, is nonspecific. In general, the topography of edema, the presence of a lesion compressing the nerve and clinical history contribute to the diagnosis. Although atrophy and fatty degeneration may persist after the disappearance of edema, they are rarely symptomatic. The main differential diagnosis is Parsonage–Turner syndrome. Evidence of a cyst pressing on a nerve may prompt puncture-infiltration guided by ultrasonography or CT-scan

  2. Shoulder Problems in Athletes.

    Science.gov (United States)

    Clancy, William G., Jr.

    A description is given of typical sport-related injuries to the shoulder area. These include: (1) brachial plexus injuries; (2) peripheral nerve injuries about the shoulder; (3) acromioclavicular injuries; (4) sternoclavicular injuries; (5) shoulder dislocations; (6) recurrent traumatic subluxation/dislocations; and (7) overuse injuries.…

  3. "Floating shoulder" injuries.

    Science.gov (United States)

    Heng, Kenneth

    2016-12-01

    "Floating shoulder" is a rare injury complex resulting from high-energy blunt force trauma to the shoulder, resulting in scapulothoracic dissociation. It is commonly associated with catastrophic neurovascular injury. Two cases of motorcyclists with floating shoulder injuries are described. PMID:26961729

  4. [A strong man with a weak shoulder].

    Science.gov (United States)

    Henket, Marjolijn; Lycklama á Nijeholt, Geert J; van der Zwaal, Peer

    2013-01-01

    A 47-year-old former olympic athlete had pain and weakness of his left shoulder. There was no prior trauma. He had full range-of-motion and a scapular dyskinesia. There was atrophy of the trapezius and sternocleidomastoideus muscles. He was diagnosed with 'idiopathic neuritis of the accessorius nerve'. PMID:24326139

  5. Shoulder posture and median nerve sliding

    Directory of Open Access Journals (Sweden)

    Dilley Andrew

    2004-07-01

    Full Text Available Abstract Background Patients with upper limb pain often have a slumped sitting position and poor shoulder posture. Pain could be due to poor posture causing mechanical changes (stretch; local pressure that in turn affect the function of major limb nerves (e.g. median nerve. This study examines (1 whether the individual components of slumped sitting (forward head position, trunk flexion and shoulder protraction cause median nerve stretch and (2 whether shoulder protraction restricts normal nerve movements. Methods Longitudinal nerve movement was measured using frame-by-frame cross-correlation analysis from high frequency ultrasound images during individual components of slumped sitting. The effects of protraction on nerve movement through the shoulder region were investigated by examining nerve movement in the arm in response to contralateral neck side flexion. Results Neither moving the head forward or trunk flexion caused significant movement of the median nerve. In contrast, 4.3 mm of movement, adding 0.7% strain, occurred in the forearm during shoulder protraction. A delay in movement at the start of protraction and straightening of the nerve trunk provided evidence of unloading with the shoulder flexed and elbow extended and the scapulothoracic joint in neutral. There was a 60% reduction in nerve movement in the arm during contralateral neck side flexion when the shoulder was protracted compared to scapulothoracic neutral. Conclusion Slumped sitting is unlikely to increase nerve strain sufficient to cause changes to nerve function. However, shoulder protraction may place the median nerve at risk of injury, since nerve movement is reduced through the shoulder region when the shoulder is protracted and other joints are moved. Both altered nerve dynamics in response to moving other joints and local changes to blood supply may adversely affect nerve function and increase the risk of developing upper quadrant pain.

  6. Shoulder instability; Schultergelenkinstabilitaet

    Energy Technology Data Exchange (ETDEWEB)

    Sailer, J.; Imhof, H. [Abteilung Osteoradiologie, Univ.-Klinik fuer Radiodiagnostik Wien (Austria)

    2004-06-01

    Shoulder instability is a common clinical feature leading to recurrent pain and limitated range of motion within the glenohumeral joint. Instability can be due a single traumatic event, general joint laxity or repeated episodes of microtrauma. Differentiation between traumatic and atraumatic forms of shoulder instability requires careful history and a systemic clinical examination. Shoulder laxity has to be differentiated from true instability followed by the clinical assessment of direction and degree of glenohumeral translation. Conventional radiography and CT are used for the diagnosis of bony lesions. MR imaging and MR arthrography help in the detection of soft tissue affection, especially of the glenoid labrum and the capsuloligamentous complex. The most common lesion involving the labrum is the anterior labral tear, associated with capsuloperiostal stripping (Bankart lesion). A number of variants of the Bankart lesion have been described, such as ALPSA, SLAP or HAGL lesions. The purpose of this review is to highlight different forms of shoulder instability and its associated radiological findings with a focus on MR imaging. (orig.) [German] Die Schultergelenkinstabilitaet ist haeufig fuer wiederholt auftretende Schmerzen sowie eine eingeschraenkte Beweglichkeit im Glenohumeralgelenk verantwortlich. Sie kann als Folge eines vorangegangenen Traumas, einer generellen Hyperlaxitaet oder infolge wiederholter Mikrotraumen entstehen. Die Differenzierung zwischen traumatischer und atraumatischer Form der Gelenkinstabilitaet erfordert eine sorgfaeltige Anamnese und eine genaue klinische Untersuchung. Die Gelelenklaxitaet als Differenzialdiagnose muss von der echten Instabilitaet unterschieden werden, die Instabilitaet wird dann im Rahmen des klinischen Status nach Grad und Richtung der glenohumeralen Translation unterteilt. Zur Diagnose knoecherner Laesionen werden das konventionelle Roentgen sowie die CT herangezogen. MRT sowie MR-Arthrographie dienen zur Detektion

  7. Force steadiness, muscle activity, and maximal muscle strength in subjects with subacromial impingement syndrome

    DEFF Research Database (Denmark)

    Bandholm, Thomas; Rasmussen, Lars; Aagaard, Per;

    2006-01-01

    physically active in spite of shoulder pain and nine healthy matched controls were examined to determine isometric and isokinetic submaximal shoulder-abduction force steadiness at target forces corresponding to 20%, 27.5%, and 35% of the maximal shoulder abductor torque, and maximal shoulder muscle strength......We investigated the effects of the subacromial impingement syndrome (SIS) on shoulder sensory-motor control and maximal shoulder muscle strength. It was hypothesized that both would be impaired due to chronic shoulder pain associated with the syndrome. Nine subjects with unilateral SIS who remained......-group differences in shoulder MVC were observed. The present data suggest that shoulder sensory-motor control is only mildly impaired in subjects with SIS who are able to continue with upper body physical activity in spite of shoulder pain. Thus, physical activity should be continued by patients with SIS, if...

  8. Intra-articular elastofibroma of the shoulder joint

    International Nuclear Information System (INIS)

    A 19-year-old man presented with an elastofibroma in his left shoulder joint. The patient had had limitation of motion in his left arm for 3 years, especially when rotating internally. Radiography of his left shoulder showed bone erosion in the neck of the humerus. On MR imaging, a soft tissue mass was noted in the shoulder joint eroding bone. The mass showed similar signal intensity to that of surrounding muscles on T1- and T2-weighted images. At surgery, a soft, encapsulated mass was found attached to the subscapularis muscle. It was pathologically confirmed as an elastofibroma. This unusual manifestation of an elastofibroma is discussed. (orig.)

  9. Shoulder joint tuberculosis

    International Nuclear Information System (INIS)

    Despite the fact that joint tuberculosis is one of the most common forms of extrapulmonary tuberculosis, it is a disease entity that is very rare in Poland (less than 100 cases a year in the last 10 years). The symptoms are non-specific, and thus the disease is rarely taken into account in preliminary differential diagnosis. A 68-year-old female patient was admitted to the Internal Diseases Clinic due to oedema and pain of the right shoulder joint. The pain has been increasing for about 8 months. Physical examination revealed increased circumference and elevated temperature of the right shoulder joint. Limb function was retained. The full range of radiological and laboratory diagnostic examinations was performed, including the biopsy of the affected tissue which revealed the presence of Mycobacterium tuberculosis in the bacterial culture. Clinical improvement was obtained after introduction of TB drugs. Radiological diagnostic methods (X-ray, CT scans, MRI scans) provide high precision monitoring of articular lesions. However, the decisive diagnosis requires additional laboratory tests as well as histopathological and bacteriological assays

  10. The painful shoulder

    International Nuclear Information System (INIS)

    The painful shoulder syndrome is very common. Diagnosis and differential diagnosis may be difficult. Shoulder pain may be caused by local processes or systemic diseases or can be referred. Periarthritis humeroscapularis (frozen shoulder) is the most common cause of painful shoulder syndrome. Biomechanical factors concerning the rotator cuff are involved in the etiopathogenesis of these pain syndromes. The therapy of frozen shoulder includes physical treatment, antirheumatic drugs, or X-ray treatment. Surgical measures may become necessary. In the course of rheumatoid arthritis the shoulder may be involved. Milwaukee-shoulder-syndrome has been described recently in crystal deposit diseases. Shoulder pain may be referred by mechanical irritations of nerve roots in the course of degenerative lesions of the cervical spine and also in the course of internal diseases of the heart, the lungs, or the gastrointestinal tract. In cases of shoulder pain without pathological data from arthrological, radiological or laboratory studies, one should always consider localized fibromyalgia in the shoulder-neck-region. The precise diagnosis of shoulder pain is an important prerequisite for treatment, the success of which should not be judged as pessimistic as it has been commonly done in the past. (orig.)

  11. Acute Shoulder Injuries in Adults.

    Science.gov (United States)

    Monica, James; Vredenburgh, Zachary; Korsh, Jeremy; Gatt, Charles

    2016-07-15

    Acute shoulder injuries in adults are often initially managed by family physicians. Common acute shoulder injuries include acromioclavicular joint injuries, clavicle fractures, glenohumeral dislocations, proximal humerus fractures, and rotator cuff tears. Acromioclavicular joint injuries and clavicle fractures mostly occur in young adults as the result of a sports injury or direct trauma. Most nondisplaced or minimally displaced injuries can be treated conservatively. Treatment includes pain management, short-term use of a sling for comfort, and physical therapy as needed. Glenohumeral dislocations can result from contact sports, falls, bicycle accidents, and similar high-impact trauma. Patients will usually hold the affected arm in their contralateral hand and have pain with motion and decreased motion at the shoulder. Physical findings may include a palpable humeral head in the axilla or a dimple inferior to the acromion laterally. Reduction maneuvers usually require intra-articular lidocaine or intravenous analgesia. Proximal humerus fractures often occur in older patients after a low-energy fall. Radiography of the shoulder should include a true anteroposterior view of the glenoid, scapular Y view, and axillary view. Most of these fractures can be managed nonoperatively, using a sling, early range-of-motion exercises, and strength training. Rotator cuff tears can cause difficulty with overhead activities or pain that awakens the patient from sleep. On physical examination, patients may be unable to hold the affected arm in an elevated position. It is important to recognize the sometimes subtle signs and symptoms of acute shoulder injuries to ensure proper management and timely referral if necessary. PMID:27419328

  12. Protein Turnover and Cellular Stress in Mildly and Severely Affected Muscles from Patients with Limb Girdle Muscular Dystrophy Type 2I

    DEFF Research Database (Denmark)

    Hauerslev, Simon; Sveen, Marie-Louise; Vissing, John;

    2013-01-01

    Patients with Limb girdle muscular dystrophy type 2I (LGMD2I) are characterized by progressive muscle weakness and wasting primarily in the proximal muscles, while distal muscles often are spared. Our aim was to investigate if wasting could be caused by impaired regeneration in the proximal...... stress were highly increased in severely affected muscles compared to mildly affected muscles. Our results indicate that alterations in the protein turnover and myostatin levels could progressively impair the muscle mass maintenance and/or regeneration resulting in gradual muscular atrophy....

  13. Shoulder pain in primary care: frozen shoulder.

    Science.gov (United States)

    Cadogan, Angela; Mohammed, Khalid D

    2016-03-01

    BACKGROUND AND CONTEXT Frozen shoulder is a painful condition that follows a protracted clinical course. We aim to review the management of patients with a diagnosis of frozen shoulder who are referred for specialist orthopaedic evaluation against existing guidelines in primary care. ASSESSMENT OF PROBLEM Referrals and clinical records were reviewed for all patients referred for orthopaedic specialist assessment who received a specialist diagnosis of frozen shoulder. Diagnostic, investigation and management practices from a regional primary health care setting in New Zealand were compared with guideline-recommended management. RESULTS Eighty patients with frozen shoulder were referred for orthopaedic evaluation in the 13 month study period, mostly from general practice. Fifteen patients (19%) were identified as having a frozen shoulder in their medical referral. Most (99%) had received previous imaging. Seven patients (12%) had received guideline recommended treatment. STRATEGIES FOR IMPROVEMENT Education of all clinicians involved in patient management is important to ensure an understanding of the long natural history of frozen shoulder and provide reassurance that outcomes are generally excellent. HealthPathways now include more information regarding diagnosis, imaging and evidence-based management for frozen shoulder. LESSONS Frozen shoulder may be under-diagnosed among patients referred for orthopaedic review. Ultrasound imaging is commonly used and may identify occult and unrelated pathology in this age-group. When managed according to clinical guidelines, patients report significant clinical and functional improvement with most reporting 80% function compared with normal after 1 year. KEYWORDS Adhesive capsulitis; bursitis; injections; practice guideline; primary health care; ultrasound. PMID:27477374

  14. Concept of healing of recurrent shoulder dislocation

    Directory of Open Access Journals (Sweden)

    Donato D'Angelo

    2014-08-01

    Full Text Available This paper presents the main surgical techniques applied in the treatment of anterior recurrent shoulder dislocation, aiming the achievement of the normality of articulate movements. This was obtained by combining distinct surgical procedures, which allowed the recovery of a complete functional capacity of the shoulder, without jeopardizing the normality of movement, something that has not been recorded in the case of the tense sutures of the surgical procedures of Putti-Platt, Bankart, Latarjet, Dickson-O'Dell and others.The careful review of the methods applied supports the conclusion that recurrent shoulder dislocation can be cured, since cure has been obtained in 97% of the treated cases. However, some degree of limitation in the shoulder movement has been observed in most of the treated cases.Our main goal was to achieve a complete shoulder functional recovery, by treating simultaneously all of the anatomical–pathological lesions, without considering the so-called essential lesions.The period of post-operatory immobilization only last for the healing of soft parts; this takes place in a position of neutral shoulder rotation, since the use of vascular bone graft eliminates the need for long time immobilization, due to the shoulder stabilization provided by rigid fixation of the coracoid at the glenoid edge, as in the Latarjet's technique.Our procedure, used since 1959, comprises the association of several techniques, which has permitted shoulder healing without movement limitation. That was because of the tension reduction in the sutures of the subescapularis, capsule, and coracobraquialis muscles.

  15. Functional MR imaging study of the shoulder

    International Nuclear Information System (INIS)

    This paper presents a functional MR study of the shoulder performed with the positioning in which patients were about to complain of shoulder pain. A 0.064-T permanent MR system was used. The effectiveness of this study was evaluated in the diagnosis of rotator cuff impingement syndrome. Thirteen patients (11 males and two female) were examined prospectively. Three-dimensional Fourier transformation coronal images were obtained with patients' arms at the maximal abduction. They were compared with images obtained while patients' arms were at their sides, chiefly from the viewpoint of severity of impingement and intensity change of the supraspinatus muscle

  16. IL-6 signaling blockade increases inflammation but does not affect muscle function in the mdx mouse

    Directory of Open Access Journals (Sweden)

    Kostek Matthew C

    2012-06-01

    Full Text Available Abstract Background IL-6 is a pleiotropic cytokine that modulates inflammatory responses and plays critical roles in muscle maintenance and remodeling. In the mouse model (mdx of Duchenne Muscular Dystrophy, IL-6 and muscle inflammation are elevated, which is believed to contribute to the chronic inflammation and failure of muscle regeneration in DMD. The purpose of the current study was to examine the effect of blocking IL-6 signaling on the muscle phenotype including muscle weakness and pathology in the mdx mouse. Methods A monoclonal antibody against the IL-6 receptor (IL-6r mAb that blocks local and systemic IL-6 signaling was administered to mdx and BL-10 mice for 5 weeks and muscle function, histology, and inflammation were examined. Results IL-6r mAb treatment increased mdx muscle inflammation including total inflammation score and ICAM-1 positive lumens in muscles. There was no significant improvement in muscle strength nor muscle pathology due to IL-6r mAb treatment in mdx mice. Conclusions These results showed that instead of reducing inflammation, IL-6 signaling blockade for 5 weeks caused an increase in muscle inflammation, with no significant change in indices related to muscle regeneration and muscle function. The results suggest a potential anti-inflammatory instead of the original hypothesized pro-inflammatory role of IL-6 signaling in the mdx mice.

  17. Correlation of Shoulder and Elbow Injuries with Muscle Tightness, Core Stability, and Balance by Longitudinal Measurements in Junior High School Baseball Players

    OpenAIRE

    Endo, Yasuhiro; Sakamoto, Masaaki

    2014-01-01

    [Purpose] The present study longitudinally investigated injury occurrences and the risk factors for muscle tightness, core stability, and dynamic standing balance among junior high school student baseball players. [Subjects] Thirty-nine male students, belonging to baseball clubs at 2 junior high schools, participated in this study. [Methods] Study measurements were obtained twice, once in the early stage of the baseball season (March) and once at the end of the season (July). All subjects und...

  18. Protocol for Shoulder function training reducing musculoskeletal pain in shoulder and neck: a randomized controlled trial

    Directory of Open Access Journals (Sweden)

    Mortensen Ole S

    2011-01-01

    Full Text Available Abstract Background Neck and shoulder complaints are common among employees in sedentary occupations characterized by intensive computer use. Such musculoskeletal pain - which is often associated with restricted range of motion and loss of muscle strength - is one of the most common conditions treated by physical therapists. The exact mechanism of neck pain is rarely revealed by clinical examination and the treatment has varied from passive rest to active treatments. Active treatments have often been divided into either training of the painful area or the surrounding musculature avoiding direct training of the painful area. Our study investigates the effect of the latter approach. Methods/Design A randomized controlled trial of 10 weeks duration is currently being conducted. Employed office workers with severe neck-shoulder pain are randomized to 3 × 20 min shoulder function training with training supervision or to a reference group receiving advice to stay physically active. Shoulder function training primarily focuses on the serratus anterior and lower trapezius muscle with only minimal activation the upper trapezius. An announcement was sent to the administrative section of the university including jobs characterized by intensive computer work. The first 100 positive replies entered the study. Among these inclusion criteria were pain intensity in the neck/shoulder of at least 3 on a 0-9 scale. Exclusion criteria were cardiovascular disease, trauma, hypertension, or serious chronic disease. Before and after the intervention period the participants replied to a questionnaire about musculoskeletal disorders and work disability, and underwent a standardized clinical examination of the neck and shoulder girdle. Further, on a weekly basis the participants log pain intensity of the neck and shoulder during the previous week. The primary outcome measure is pain in the neck and shoulders at week 10 based on the weekly pain registration and results

  19. US of the shoulder

    International Nuclear Information System (INIS)

    Twenty five healty people and 25 patients with shoulder pain underwent US control over a 12-month period: 24 patients with shoulder pain had rotator cuff and/or biceps tendon lesions. The US findings on rotator cuff and biceps tendon lesions are compared with those of arthrography and/or surgery (96% sensitivity). US is rapid, safe, non invasive, inexpensive and often more accurate, and its use is recommended for the routine examination of the shoulder joint insteat of arthrography

  20. Using your shoulder after surgery

    Science.gov (United States)

    ... Rotator cuff problems Rotator cuff repair Shoulder arthroscopy Shoulder pain Patient Instructions Rotator cuff exercises Rotator cuff - self-care Shoulder surgery - discharge Update Date 11/26/2014 Updated ...

  1. A Case of Simultaneous Bilateral Anterior Shoulder Dislocation

    Directory of Open Access Journals (Sweden)

    Mallanagouda N Patil

    2013-04-01

    Full Text Available Introduction: Anterior dislocation of shoulder is commonest dislocation one encounters in day to day Orthopaedic practice. But bilateral shoulder dislocations are relatively uncommon frequently posterior and secondary to violent muscle contraction. Simultaneous bilateral anterior dislocations of shoulder following trauma is rare occurrence. Case Report: 35 year old male presented to emergency department with history fall by tripping on a stone (fall on outstretched hand. He complained of pain and difficulty in moving both the shoulders. On clinical examination, patient’s both upper limbs were abducted and externally rotated. Bilaterally shoulder contour was lost with flattening. Other classical signs of shoulder dislocation viz, Bryants test, Callway sign, Hamilton’s ruler test were positive. Diagnosis was confirmed on X rays. Both shoulders were reduced in emergency operation theater under general anaesthesia by Kocher’s method and were immobilised in sling. Conclusion: Though bilateral shoulder dislocations are commonly posterior, usually either secondary to convulsions or electric shock, anterior dislocation has to be kept in mind , especially in post traumatic injuries. This bilateral dislocation also presents with practical problems immobilization and day to day care of patients. Keywords: Simultaneous, bilateral, shoulder dislocation, traumatic.

  2. Reducing Shoulder by Vertical Traction: A One-Man Method for Shoulder Reduction

    Directory of Open Access Journals (Sweden)

    Hayat Ahmad Khan

    2016-01-01

    Full Text Available Fifty percent of joint dislocations reported to the emergency department are of shoulder joint. Various techniques are used to reduce the shoulder and Spaso technique is the least known to the orthopaedic residents which is a simple one-man vertical traction method of shoulder reduction. We evaluated the effectiveness of vertical traction method for anterior shoulder dislocation by orthopaedic residents. Sixty consecutive patients of anterior glenohumeral dislocation attending the emergency department of our hospital were taken up for the study. The reduction was done using Spaso technique. Right shoulder was dislocated in 40 patients and 31 patients had recurrent shoulder dislocation. In 55 patients, shoulder was reduced without the use of any anaesthesia. In patients where no anaesthesia was used, the time of traction ranged from 45 seconds to 5 minutes, while under anaesthesia the time of traction ranged from 1 to 4 minutes. Twenty-one patients had associated greater tuberosity fracture which did not affect the method of reduction and all of them were reducible. No complication was reported, and all the patients were satisfied with the method. In conclusion vertical traction method is a good technique for reducing anterior shoulder dislocation with an easy learning curve among the residents and no complication has been reported so far.

  3. Effect of exercise at light loads with manipulative resistance on infraspinatus, trapezius (upper fiber) and deltoid (middle fiber) muscle activities in shoulder joint elevation

    OpenAIRE

    Nanba, Yoshifumi; Miyamoto, Shigenori; Takemasa, Seiichi; Uesugi, Masayuki; Inoue, Yuri; Ootani, Yoshitaka; Fujii, Shun; Hirotsu, Takaaki; Tanaka, Hideki

    2015-01-01

    [Purpose] To clarify rotator cuff muscular activity in the raised position of the closed kinetic chain (CKC) exercise. [Subjects] Twenty-nine cases were studied, 19 men and 10 women (average age 21.5 ±4.7 years old, average body weight 60.1 kg ±11.4). [Methods] To determine the effects of the closed kinetic chain exercise on the upper limb, we measured the surface EMG of the infraspinatus muscle, the trapezius (upper fiber) and the deltoid (middle fiber) with the arm elevated. [Results] Our r...

  4. Lack of Skeletal Muscle IL-6 Affects Pyruvate Dehydrogenase Activity at Rest and during Prolonged Exercise

    Science.gov (United States)

    Gudiksen, Anders; Schwartz, Camilla Lindgren; Bertholdt, Lærke; Joensen, Ella; Knudsen, Jakob G.; Pilegaard, Henriette

    2016-01-01

    Pyruvate dehydrogenase (PDH) plays a key role in the regulation of skeletal muscle substrate utilization. IL-6 is produced in skeletal muscle during exercise in a duration dependent manner and has been reported to increase whole body fatty acid oxidation, muscle glucose uptake and decrease PDHa activity in skeletal muscle of fed mice. The aim of the present study was to examine whether muscle IL-6 contributes to exercise-induced PDH regulation in skeletal muscle. Skeletal muscle-specific IL-6 knockout (IL-6 MKO) mice and floxed littermate controls (control) completed a single bout of treadmill exercise for 10, 60 or 120 min, with rested mice of each genotype serving as basal controls. The respiratory exchange ratio (RER) was overall higher (Putilization during prolonged exercise via effects on PDH. PMID:27327080

  5. Aging affects the transcriptional regulation of human skeletal muscle disuse atrophy

    DEFF Research Database (Denmark)

    Suetta, Charlotte Arneboe; Frandsen, Ulrik; Jensen, Line;

    2012-01-01

    Important insights concerning the molecular basis of skeletal muscle disuse-atrophy and aging related muscle loss have been obtained in cell culture and animal models, but these regulatory signaling pathways have not previously been studied in aging human muscle. In the present study, muscle...... atrophy was induced by immobilization in healthy old and young individuals to study the time-course and transcriptional factors underlying human skeletal muscle atrophy. The results reveal that irrespectively of age, mRNA expression levels of MuRF-1 and Atrogin-1 increased in the very initial phase (2......-4 days) of human disuse-muscle atrophy along with a marked reduction in PGC-1a and PGC-1ß (1-4 days) and a ~10% decrease in myofiber size (4 days). Further, an age-specific decrease in Akt and S6 phosphorylation was observed in young muscle within the first days (1-4 days) of immobilization. In contrast...

  6. Polyphenolic composition of grape stem extracts affects antioxidant activity in endothelial and muscle cells.

    Science.gov (United States)

    Goutzourelas, Nikolaos; Stagos, Dimitrios; Spanidis, Ypatios; Liosi, Maria; Apostolou, Anna; Priftis, Alexandros; Haroutounian, Serko; Spandidos, Demetrios A; Tsatsakis, Aristidis M; Kouretas, Demetrios

    2015-10-01

    The aim of the present study was the assessment of the antioxidant effects of polyphenolic extracts derived from the stems of three Greek grape varieties (Moshomayro, Mavrotragano and Mandilaria) in endothelial (EA.hy926) and muscle (C2C12) cells. We also investigated the effects of the polyphenolic composition on the antioxidant effects of the grape stem extracts. For this purpose, the endothelial and muscle cells were treated with low non-cytotoxic concentrations of the extracts for 24 h in order to assess the effects of the extracts on cellular redox status using oxidative stress biomarkers. The oxidative stress markers were thiobarbituric acid reactive substances (TBARS), protein carbonyl (CARB) levels, reactive oxygen species (ROS) levels and glutathione (GSH) levels. The results revealed that treatment of the EA.hy926 cells with Mandilaria extract significantly decreased the TBARS levels by 14.8% and the CARB levels by 25.9 %, while it increased the GSH levels by 15.8% compared to the controls. Moreover, treatment of the EA.hy926 cells with Mavrotragano extract significantly increased the GSH levels by 20.2%, while it significantly decreased the TBARS and CARB levels by 12.5% and 16.6%, respectively. Treatment of the C2C12 cells with Mandilaria extract significantly decreased the TBARS levels by 47.3 %, the CARB levels by 39.0 % and the ROS levels by 21.8%, while it increased the GSH levels by 22.6% compared to the controls. Moreover, treatment of the C2C12 cells with Mavrotragano significantly decreased the TBARS, CARB and ROS levels by 36.2%, 35.9% and 16.5%, respectively. In conclusion, to the best of our knowledgel, our results demonstrate for the first time that treatment with grape stem extracts at low concentrations improves the redox status of endothelial and muscle cells. Thus, grape stem extracts may be used for developing antioxidant food supplements or biofunctional foods. However, it was also found that the polyphenolic composition of grape stem

  7. Rugby Union on-field position and its relationship to shoulder injury leading to anterior reconstruction for instability.

    Science.gov (United States)

    Sundaram, Abayasankar; Bokor, Desmond J; Davidson, Andrew S

    2011-03-01

    Due to the unique demands of each position on the Rugby Union field, the likelihood of an athlete sustaining a dislocation of their shoulder joint that requires surgical reconstruction may be affected by their position on the field. 166 patients with 184 involved shoulders requiring anterior reconstruction following an on-field Rugby Union injury between January 1996 and September 2008 were analysed. The mean age at time of injury was 18 years with the mean age at time of surgery being 20 years. The most prevalent mechanism of injury was a tackle in 66.3% of players. Players were more likely to suffer injury to their non-dominant shoulder than their dominant side (McNemar's Test, p<0.001). Statistical analysis using chi-squared test of goodness of fit showed there was not a uniform risk of injury for all player positions. Positions with significantly different risk of injury were five-eighth (increased risk) and wing (reduced risk). Although we observed an increased risk in flankers and fullbacks, and a lower risk in second row, these results did not reach statistical significance after application of the Bonferroni correction. This information can be utilized by team staff to assist in pre-season conditioning as well as the development of improved muscle co-ordination programmes for the non-dominant shoulder, and planning a graduated return to sport by the player recovering from surgical reconstruction of the shoulder for instability. PMID:20864398

  8. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... Anatomic Total Shoulder surgery, which featured the latest innovation in shoulder surgery from DePuy Orthopedics. OR-Live makes it easy for you to learn more. Just click on the "Request Information" button on your webcast screen and open the door to informed medical care. 01:21: ...

  9. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... advancing the standard of orthopedic patient care. In a few moments, you'll be able to watch a live global AP anatomic total shoulder surgery from Methodist Hospital in Philadelphia. A revolution in shoulder orthopedics, the Global AP gives ...

  10. Computer keyswitch force-displacement characteristics affect muscle activity patterns during index finger tapping.

    Science.gov (United States)

    Lee, David L; Kuo, Po-Ling; Jindrich, Devin L; Dennerlein, Jack T

    2009-10-01

    This study examined the effect of computer keyboard keyswitch design on muscle activity patterns during finger tapping. In a repeated-measures laboratory experiment, six participants tapped with their index fingers on five isolated keyswitch designs with varying force-displacement characteristics that provided pairwise comparisons for the design factors of (1) activation force (0.31 N vs. 0.59 N; 0.55 N vs. 0.93 N), (2) key travel (2.5mm vs. 3.5mm), and (3) shape of the force-displacement curve as realized through buckling-spring vs. rubber-dome switch designs. A load cell underneath the keyswitch measured vertical fingertip forces, and intramuscular fine wire EMG electrodes measured muscle activity patterns of two intrinsic (first lumbricalis, first dorsal interossei) and three extrinsic (flexor digitorum superficialis, flexor digitorum profundus, and extensor digitorum communis) index finger muscles. The amplitude of muscle activity for the first dorsal interossei increased 25.9% with larger activation forces, but not for the extrinsic muscles. The amplitude of muscle activity for the first lumbricalis and the duration of muscle activities for the first dorsal interossei and both extrinsic flexor muscles decreased up to 40.4% with longer key travel. The amplitude of muscle activity in the first dorsal interossei increased 36.6% and the duration of muscle activity for all muscles, except flexor digitorum profundus, decreased up to 49.1% with the buckling-spring design relative to the rubber-dome design. These findings suggest that simply changing the force-displacement characteristics of a keyswitch changes the dynamic loading of the muscles, especially in the intrinsic muscles, during keyboard work. PMID:18515146

  11. Has the management of shoulder dislocation changed over time?

    OpenAIRE

    Chalidis, Byron; Sachinis, Nick; Dimitriou, Christos; Papadopoulos, Pericles; Samoladas, Efthimios; Pournaras, John

    2006-01-01

    Anterior shoulder dislocation is a disabling injury affecting all ages, young and old alike. Recently, the treatment of traumatic shoulder dislocation has included immobilisation for varying periods of time followed by physiotherapy. This study is the first in this country to address the demographic data and recurrence rates of shoulder dislocation. Three hundred and eight patients (170 men and 138 women) were followed up for an average of 5.9 years. The most frequent mechanism of injury was ...

  12. Shoulder injuries in professional rugby: a retrospective analysis

    OpenAIRE

    Horsley, Ian G; Fowler, Elizabeth M; Rolf, Christer G

    2013-01-01

    Background In the literature, little is known about the level and pattern of rugby injuries. Of the shoulder injuries reported, 51% of these are caused during a tackle, and 65% of all match injuries affected the shoulder. Objective The study aims to describe a sport-specific unique intra-articular shoulder pathology of professional rugby players, who presented with persistent pain and dysfunction despite physiotherapeutic treatment and rest. Method This study is a retrospective analysis set a...

  13. MRI of the shoulder

    International Nuclear Information System (INIS)

    Magnetic resonance imaging has become available at a time in which shoulder pathology is more frequently seen. It is a noninvasive procedure that does not use ionizing radiation. It provides detailed visualization of soft-tissue structures that is not possible with other imaging modalities. Though not as widely available as conventional radiographs or computed tomography scanning, the number of MRI units worldwide is increasing steadily. The main features of the present book are as follows: The physical basis of Magnetic Resonance Imaging (MRI), normal shoulder anatomy and MRI, diagnosis of shoulder disorders, MRI of patients with shoulder pain or instability, case studies as well as treatment of shoulder disorders. (orig./MG) With 145 figs

  14. Energy composition of diet affects muscle fiber recruitment, body composition, and growth trajectory in rainbow trout (Oncorhnychus mykiss)

    Science.gov (United States)

    Energy composition of diet affects muscle fiber recruitment, body composition, and growth trajectory in rainbow trout (Oncorhnychus mykiss) The cost and scarcity of key ingredients for aquaculture feed formulation call for a wise use of resources, especially dietary proteins and energy. For years t...

  15. Cyclosporin-A does not affect skeletal muscle mass during disuse and recovery

    Directory of Open Access Journals (Sweden)

    M.S. Aoki

    2006-02-01

    Full Text Available Cyclosporin-A (CsA is an immunosuppressive drug that acts as an inhibitor of calcineurin, a calcium phosphatase that has been suggested to play a role in skeletal muscle hypertrophy. The aim of the present study was to determine the effect of CsA administration (25 mg kg-1 day-1 on skeletal muscle mass and phenotype during disuse and recovery. Male Wistar rats received vehicle (N = 8 or CsA (N = 8 during hind limb immobilization (N = 8 and recovery (N = 8. Muscle weight (dry/wet and cross-sectional area were evaluated to verify the effect of CsA treatment on muscle mass. Muscle phenotype was assessed by histochemistry of myosin ATPase. CsA administration during immobilization and recovery did not change muscle/body weight ratio in the soleus (SOL or plantaris (PL. Regarding muscle phenotype, we observed a consistent slow-to-fast shift in all experimental groups (immobilized only, receiving CsA only, and immobilized receiving CsA as compared to control in both SOL and PL (P < 0.05. During recovery, no difference was observed in SOL or PL fiber type composition between the experimental recovered group and recovered group receiving CsA compared to their respective controls. Considering the muscle/body weight ratio, CsA administration does not maximize muscle mass loss induced by immobilization. Our results also indicate that CsA fails to block skeletal muscle regrowth after disuse. The present data suggest that calcineurin inhibition by CsA modulates muscle phenotype rather than muscle mass.

  16. Aging affects the transcriptional regulation of human skeletal muscle disuse atrophy.

    Directory of Open Access Journals (Sweden)

    Charlotte Suetta

    Full Text Available Important insights concerning the molecular basis of skeletal muscle disuse-atrophy and aging related muscle loss have been obtained in cell culture and animal models, but these regulatory signaling pathways have not previously been studied in aging human muscle. In the present study, muscle atrophy was induced by immobilization in healthy old and young individuals to study the time-course and transcriptional factors underlying human skeletal muscle atrophy. The results reveal that irrespectively of age, mRNA expression levels of MuRF-1 and Atrogin-1 increased in the very initial phase (2-4 days of human disuse-muscle atrophy along with a marked reduction in PGC-1α and PGC-1β (1-4 days and a ~10% decrease in myofiber size (4 days. Further, an age-specific decrease in Akt and S6 phosphorylation was observed in young muscle within the first days (1-4 days of immobilization. In contrast, Akt phosphorylation was unchanged in old muscle after 2 days and increased after 4 days of immobilization. Further, an age-specific down-regulation of MuRF-1 and Atrogin-1 expression levels was observed following 2 weeks of immobilization, along with a slowing atrophy response in aged skeletal muscle. Neither the immediate loss of muscle mass, nor the subsequent age-differentiated signaling responses could be explained by changes in inflammatory mediators, apoptosis markers or autophagy indicators. Collectively, these findings indicate that the time-course and regulation of human skeletal muscle atrophy is age dependent, leading to an attenuated loss in aging skeletal muscle when exposed to longer periods of immobility-induced disuse.

  17. Return to Play After Shoulder Stabilization in National Football League Athletes

    OpenAIRE

    White, Matthew J.; Fleisig, Glenn S.; Aune, Kyle; Andrews, James R.; Dugas, Jeffrey R.; Cain, E. Lyle

    2014-01-01

    Objectives: Shoulder instability is a common and limiting injury to football players. The return to play (RTP) percentage and factors affecting RTP after shoulder stabilization in National Football League (NFL) players are not defined. The purpose of this study was to determine the rate of return to professional football play in the NFL after shoulder stabilization and to determine what factors may affect RTP in these athletes. Methods: Sixty NFL players who had undergone shoulder stabilizati...

  18. Effect of two contrasting types of physical exercise on chronic neck muscle pain

    DEFF Research Database (Denmark)

    Andersen, L.L.; Kjær, Michael; Søgaard, Kirsten;

    2008-01-01

    Objective. The prevalence of neck muscle pain has steadily increased and especially pain from the descending part of the trapezius muscle has been associated with monotonous work tasks such as computer work. Physical exercise is generally recommended as treatment, but it is unclear which type...... for the affected muscle, general fitness training performed as leg bicycling with relaxed shoulders, or a reference intervention without physical activity. The main outcome measure was an acute and prolonged change in intensity of neck muscle pain (100-mm visual analog scale [VAS]). Results. A decrease of 35 mm...

  19. Effect of two contrasting types of physical exercise on chronic neck muscle pain

    DEFF Research Database (Denmark)

    Andersen, Lars L; Kjaer, Michael; Søgaard, Karen;

    2008-01-01

    OBJECTIVE: The prevalence of neck muscle pain has steadily increased and especially pain from the descending part of the trapezius muscle has been associated with monotonous work tasks such as computer work. Physical exercise is generally recommended as treatment, but it is unclear which type...... for the affected muscle, general fitness training performed as leg bicycling with relaxed shoulders, or a reference intervention without physical activity. The main outcome measure was an acute and prolonged change in intensity of neck muscle pain (100-mm visual analog scale [VAS]). RESULTS: A decrease of 35 mm...

  20. Plectin isoform P1b and P1d deficiencies differentially affect mitochondrial morphology and function in skeletal muscle

    Science.gov (United States)

    Winter, Lilli; Kuznetsov, Andrey V.; Grimm, Michael; Zeöld, Anikó; Fischer, Irmgard; Wiche, Gerhard

    2015-01-01

    Plectin, a versatile 500-kDa cytolinker protein, is essential for muscle fiber integrity and function. The most common disease caused by mutations in the human plectin gene, epidermolysis bullosa simplex with muscular dystrophy (EBS-MD), is characterized by severe skin blistering and progressive muscular dystrophy. Besides displaying pathological desmin-positive protein aggregates and degenerative changes in the myofibrillar apparatus, skeletal muscle specimens of EBS-MD patients and plectin-deficient mice are characterized by massive mitochondrial alterations. In this study, we demonstrate that structural and functional alterations of mitochondria are a primary aftermath of plectin deficiency in muscle, contributing to myofiber degeneration. We found that in skeletal muscle of conditional plectin knockout mice (MCK-Cre/cKO), mitochondrial content was reduced, and mitochondria were aggregated in sarcoplasmic and subsarcolemmal regions and were no longer associated with Z-disks. Additionally, decreased mitochondrial citrate synthase activity, respiratory function and altered adenosine diphosphate kinetics were characteristic of plectin-deficient muscles. To analyze a mechanistic link between plectin deficiency and mitochondrial alterations, we comparatively assessed mitochondrial morphology and function in whole muscle and teased muscle fibers of wild-type, MCK-Cre/cKO and plectin isoform-specific knockout mice that were lacking just one isoform (either P1b or P1d) while expressing all others. Monitoring morphological alterations of mitochondria, an isoform P1b-specific phenotype affecting the mitochondrial fusion–fission machinery and manifesting with upregulated mitochondrial fusion-associated protein mitofusin-2 could be identified. Our results show that the depletion of distinct plectin isoforms affects mitochondrial network organization and function in different ways. PMID:26019234

  1. Use of Pool Noodles for The Shoulder and Ankle

    OpenAIRE

    Nelson, Russell

    2007-01-01

    The purpose of this manuscript is to provide two clinical suggestions that are inexpensive, easy to fabricate, and very user-friendly activities that can be used for most patients and athletes. The first clinical suggestion is a method of restoring stability of the scapular muscles around the shoulder complex. Following a period of disuse, whether from a surgery or an injury, weakness may be present in the shoulder. This suggestion is an easy and inexpensive tool which can be used in restorin...

  2. Trapezius transfer to treat flail shoulder after brachial plexus palsy

    Directory of Open Access Journals (Sweden)

    Diaz Humberto

    2007-01-01

    Full Text Available Abstract Background After severe brachial palsy involving the shoulder, many different muscle transfers have been advocated to restore movement and stability of the shoulder. Paralysis of the deltoid and supraspinatus muscles can be treated by transfer of the trapezius. Methods We treated 10 patients, 8 males and 2 females, by transfer of the trapezius to the proximal humerus. In 6 patients the C5 and C6 roots had been injuried; in one C5, C6 and C7 roots; and 3 there were complete brachial plexus injuries. Eight of the 10 had had neurosurgical repairs before muscle transfer. Their average age was 28.3 years (range 17 to 41, the mean delay between injury and transfer was 3.1 years (range 14 months to 6.3 years and the average follow-up was 17.5 months (range 6 to 52, reporting the clinical and radiological results. Evaluation included physical and radiographic examinations. A modification of Mayer's transfer of the trapezius muscle was performed. The principal goal of this work was to evaluate the results of the trapezius transfer for flail shoulder after brachial plexus injury. Results All 10 patients had improved function with a decrease in instability of the shoulder. The average gain in shoulder abduction was 46.2°; the gain in shoulder flexion average 37.4°. All patients had stable shoulder (no subluxation of the humeral head on radiographs. Conclusion Trapezius transfer for a flail shoulder after brachial plexus palsy can provide satisfactory function and stability.

  3. Interscalene brachial plexus blocks in the management of shoulder dislocations.

    OpenAIRE

    Underhill, T J; Wan, A; Morrice, M

    1989-01-01

    Interscalene brachial plexus block is a simple and effective alternative to intravenous benzodiazepines or general anaesthesia for manipulation of the dislocated shoulder. Thirty interscalene brachial plexus blocks were performed on 29 patients with dislocations of the shoulder to provide regional anaesthesia for reduction. Pain was abolished by 14 out of the 30 blocks performed, improved by 13 and unchanged by three. Muscle relaxation (MRC grade 3 or less) occurred in 21 patients. In 26 case...

  4. Bi-tangential hybrid IMRT for sparing the shoulder in whole breast irradiation

    Energy Technology Data Exchange (ETDEWEB)

    Farace, P.; Deidda, M.A.; Iamundo de Curtis, I.; Deiana, E.; Farigu, R.; Lay, G.; Porru, S. [Regional Oncological Hospital, Cagliari (Italy). Dept. of Radio-Oncology

    2013-11-15

    Background and purpose: A bi-tangential technique is proposed to reduce undesired doses to the shoulder produced by standard tangential irradiation. Patients and methods: A total of 6 patients affected by shoulder pain and reduced functional capacity after whole-breast irradiation were retrospectively analysed. The standard tangential plan used for treatment was compared with (1) a single bi-tangential plan where, to spare the shoulder, the lateral open tangent was split into two half-beams at isocentre, with the superior portion rotated by 10-20 medially with respect to the standard lateral beam; (2) a double bi-tangential plan, where both the tangential open beams were split. The planning target volume (PTV) coverage and the dose to the portion of muscles and axilla included in the standard tangential beams were compared. Results: PTV95 % of standard plan (91.9 {+-} 3.8) was not significantly different from single bi-tangential plan (91.8 {+-} 3.4); a small but significant (p < 0.01) decrease was observed with the double bi-tangential plan (90.1 {+-} 3.7). A marked dose reduction to the muscle was produced by the single bi-tangential plan around 30-40 Gy. The application of the double bi-tangential technique further reduced the volume receiving around 20 Gy, but did not markedly affect the higher doses. The dose to the axilla was reduced both in the single and the double bi-tangential plans. Conclusion: The single bi-tangential technique would have been able to reduce the dose to shoulder and axilla, without compromising target coverage. This simple technique is valuable for irradiation after axillary lymph node dissection or in patients without dissection due to negative or low-volume sentinel lymph node disease. (orig.)

  5. Bi-tangential hybrid IMRT for sparing the shoulder in whole breast irradiation

    International Nuclear Information System (INIS)

    Background and purpose: A bi-tangential technique is proposed to reduce undesired doses to the shoulder produced by standard tangential irradiation. Patients and methods: A total of 6 patients affected by shoulder pain and reduced functional capacity after whole-breast irradiation were retrospectively analysed. The standard tangential plan used for treatment was compared with (1) a single bi-tangential plan where, to spare the shoulder, the lateral open tangent was split into two half-beams at isocentre, with the superior portion rotated by 10-20 medially with respect to the standard lateral beam; (2) a double bi-tangential plan, where both the tangential open beams were split. The planning target volume (PTV) coverage and the dose to the portion of muscles and axilla included in the standard tangential beams were compared. Results: PTV95 % of standard plan (91.9 ± 3.8) was not significantly different from single bi-tangential plan (91.8 ± 3.4); a small but significant (p < 0.01) decrease was observed with the double bi-tangential plan (90.1 ± 3.7). A marked dose reduction to the muscle was produced by the single bi-tangential plan around 30-40 Gy. The application of the double bi-tangential technique further reduced the volume receiving around 20 Gy, but did not markedly affect the higher doses. The dose to the axilla was reduced both in the single and the double bi-tangential plans. Conclusion: The single bi-tangential technique would have been able to reduce the dose to shoulder and axilla, without compromising target coverage. This simple technique is valuable for irradiation after axillary lymph node dissection or in patients without dissection due to negative or low-volume sentinel lymph node disease. (orig.)

  6. Endothelial nitric oxide synthase (NOS) deficiency affects energy metabolism pattern in murine oxidative skeletal muscle.

    Science.gov (United States)

    Momken, Iman; Fortin, Dominique; Serrurier, Bernard; Bigard, Xavier; Ventura-Clapier, Renée; Veksler, Vladimir

    2002-01-01

    Oxidative capacity of muscles correlates with capillary density and with microcirculation, which in turn depend on various regulatory factors, including NO generated by endothelial nitric oxide synthase (eNOS). To determine the role of eNOS in patterns of regulation of energy metabolism in various muscles, we studied mitochondrial respiration in situ in saponin-permeabilized fibres as well as the energy metabolism enzyme profile in the cardiac, soleus (oxidative) and gastrocnemius (glycolytic) muscles isolated from mice lacking eNOS (eNOS(-/-)). In soleus muscle, the absence of eNOS induced a marked decrease in both basal mitochondrial respiration without ADP (-32%; P <0.05) and maximal respiration in the presence of ADP (-29%; P <0.05). Furthermore, the eNOS(-/-) soleus muscle showed a decrease in total creatine kinase (-29%; P <0.05), citrate synthase (-31%; P <0.01), adenylate kinase (-27%; P <0.05), glyceraldehyde-3-phosphate dehydrogenase (-43%; P <0.01) and pyruvate kinase (-26%; P <0.05) activities. The percentage of myosin heavy chains I (slow isoform) was significantly increased from 24.3+/-1.5% in control to 30.1+/-1.1% in eNOS(-/-) soleus muscle ( P <0.05) at the expense of a slight non-significant decrease in the three other (fast) isoforms. Besides, eNOS(-/-) soleus showed a 28% loss of weight. Interestingly, we did not find differences in any parameters in cardiac and gastrocnemius muscles compared with respective controls. These results show that eNOS knockout has an important effect on muscle oxidative capacity as well on the activities of energy metabolism enzymes in oxidative (soleus) muscle. The absence of such effects in cardiac and glycolytic (gastrocnemius) muscle suggests a specific role for eNOS-produced NO in oxidative skeletal muscle. PMID:12123418

  7. PUFAs acutely affect triacylglycerol-derived skeletal muscle fatty acid uptake and increase postprandial insulin sensitivity

    NARCIS (Netherlands)

    Jans, A.; Konings, E.; Goossens, G.H.; Bouwman, F.G.; Moors, C.C.; Boekschoten, M.V.; Afman, L.A.; Muller, M.R.; Mariman, E.C.; Blaak, E.E.

    2012-01-01

    Background: Dietary fat quality may influence skeletal muscle lipid processing and fat accumulation, thereby modulating insulin sensitivity. Objective: The objective was to examine the acute effects of meals with various fatty acid (FA) compositions on skeletal muscle FA processing and postprandial

  8. Glucocorticoids increase adipocytes in muscle by affecting IL-4 regulated FAP activity.

    Science.gov (United States)

    Dong, Yanjun; Silva, Kleiton Augusto Santos; Dong, Yanlan; Zhang, Liping

    2014-09-01

    An increase in intramuscular adipocyte tissue (IMAT) is associated with glucose dysregulation, decreased muscle strength, and increased risk of disability. Unfortunately, the mechanisms stimulating intramuscular adipogenesis remain unclear. We found that dexamethasone (Dex) administration to mice with injured muscles stimulates the accumulation of IMAT. To identify precursors of these adipocytes, we isolated satellite cells and fibro/adipogenic progenitors (FAPs) from muscle; satellite cells did not differentiate into adipocytes even following Dex treatment. In contrast, Dex stimulated FAP differentiation into adipocytes. In vivo, we transplanted purified FAPs from transgenic, EGFP mice into the injured muscles of C57/BL6 mice and found that Dex administration stimulated adipogenesis from FAP-EGFP. The increase in adipogenesis depended on Dex-induced inhibition of interleukin-4 (IL-4). In the injured muscle of IL-4-knockout mice, the levels of adipocytes were increased, while in the injured muscles of Dex-treated mice with IL-4 injections, adipogenesis was suppressed. In cultured FAPs, IL-4 inhibited Dex-induced conversion of FAPs into adipocytes; this did not occur in FAPs expressing knockdown of the IL-4 receptor. Thus, we concluded that glucocorticoids stimulate FAPs to differentiate into adipocytes in injured muscles. This process is blocked by IL-4, suggesting that interfering with IL-4 signaling could prevent adipogenesis in muscle. PMID:24948596

  9. Shoulder instability; Schulterinstabilitaeten

    Energy Technology Data Exchange (ETDEWEB)

    Kreitner, Karl-Friedrich [Mainiz Univ. (Germany). Klinik und Poliklinik fuer Diagnostische und Interventionelle Radiologie

    2014-06-15

    In the shoulder, the advantages of range of motion are traded for the disadvantages of vulnerability to injury and the development of instability. Shoulder instability and the lesion it produces represent one of the main causes of shoulder discomfort and pain. Shoulder instability is defined as a symptomatic abnormal motion of the humeral head relative to the glenoid during active shoulder motion. Glenohumeral instabilities are classified according to their causative factors as the pathogenesis of instability plays an important role with respect to treatment options: instabilities are classified in traumatic and atraumatic instabilities as part of a multidirectional instability syndrome, and in microtraumatic instabilities. Plain radiographs ('trauma series') are performed to document shoulder dislocation and its successful reposition. Direct MR arthrography is the most important imaging modality for delineation the different injury patterns on the labral-ligamentous complex and bony structures. Monocontrast CT-arthrography with use of multidetector CT scanners may be an alternative imaging modality, however, regarding the younger patient age, MR imaging should be preferred in the diagnostic work-up of shoulder instabilities. (orig.)

  10. Development of a Finite Element Model of the Human Shoulder to Investigate the Mechanical Responses and Injuries in Side Impact

    Science.gov (United States)

    Iwamoto, Masami; Miki, Kazuo; Yang, King H.

    Previous studies in both fields of automotive safety and orthopedic surgery have hypothesized that immobilization of the shoulder caused by the shoulder injury could be related to multiple rib fractures, which are frequently life threatening. Therefore, for more effective occupant protection, it is important to understand the relationship between shoulder injury and multiple rib fractures in side impact. The purpose of this study is to develop a finite element model of the human shoulder in order to understand this relationship. The shoulder model included three bones (the humerus, scapula and clavicle) and major ligaments and muscles around the shoulder. The model also included approaches to represent bone fractures and joint dislocations. The relationships between shoulder injury and immobilization of the shoulder are discussed using model responses for lateral shoulder impact. It is also discussed how the injury can be related to multiple rib fractures.

  11. The Shoulder Gradient in Patients with Unilateral Shoulder Impingement Syndrome

    OpenAIRE

    Kim, Hee-Sang; Lee, Jong Ha; Yun, Dong Hwan; Yun, Jee-Sang; Shin, Yong Won; Chon, Jinmann; Hwang, Dae Gyu

    2011-01-01

    Objective To investigate the relationship between the shoulder gradient and acromiohumeral interval of both shoulders in patients with unilateral shoulder impingement syndrome. Method Using the angulometer, we measured the shoulder gradient in patients with unilateral shoulder impingement syndrome in a standing position. Using the radiography, we measured the acromiohumeral interval and the angle between a vertical line and a line connecting a superior angle with an inferior angle of the scap...

  12. Short-term immobilization and recovery affect skeletal muscle but not collagen tissue turnover in humans

    DEFF Research Database (Denmark)

    Christensen, Britt; Dyrberg, Eva; Aagaard, Per;

    2008-01-01

    6% (5,413 to 5,077 mm(2)) in cross-sectional area (CSA) of the triceps surae muscles and a mean decrease of 9% (261 to 238 N.m) in strength of the immobilized calf muscles. Two weeks of recovery resulted in a 6% increased in CSA (to 5,367 mm(2)), whereas strength remained suppressed (240 N.m). No...... muscle size and strength, while tendon size and collagen turnover were unchanged. While recovery resulted in an increase in muscle size, strength was unchanged. No significant difference in tendon size could be detected between the two legs after 2 wk of recovery, although collagen synthesis was...... increased in the previously immobilized leg. Thus 2 wk of immobilization are sufficient to induce significant changes in muscle tissue, whereas tendon tissue seems to be more resistant to short-term immobilization....

  13. Painful/unstable shoulder

    International Nuclear Information System (INIS)

    This paper reports on the diagnostic performance of CT-arthrography of the painful/unstable shoulder that was evaluated in more than 300 patients. We have encountered a great variety of painful shoulder pathology, including impingement syndrome, cuff tear arthropathy, lesions of the long head of the biceps tendon, calcifying tendinitis, adhesive capsulitis, dead arm syndrome, and degenerative joint disease. Lesions related to instability include cases of capsular avulsions, disruption of the glenohumeral ligaments, labral pathology, glenoid fractures, Hill-Sachs lesions, and changes in glenoid angulation. CT-arthrography is an accurate exploration for both unstable and painful shoulders

  14. The difficulty of the postural control task affects multi-muscle control during quiet standing.

    Science.gov (United States)

    García-Massó, X; Pellicer-Chenoll, M; Gonzalez, L M; Toca-Herrera, J L

    2016-07-01

    The aim of this study was to compare the electromyographic (EMG) coherence between the lower limb and the core muscles when carrying out two postural tasks at different difficulty levels. EMG was recorded in 20 healthy male subjects while performing two independent quiet standing tasks. The first one involved a bipedal stance with the eyes open, while the second consisted of a dominant unipedal stance also with the eyes open. The obtained EMG signals were analysed by computing estimations of EMG-EMG coherence between muscle pairs, both singly (single-pair estimations) and combined (pooled estimations). Pooled and single coherence of anterior, posterior, core, antagonist and mixed pairs of muscles were significant in the 0-5 Hz frequency band. The results indicate that core and antagonist muscle groups, such as the anterior and posterior muscles, share low-frequency neural inputs (0-5 Hz) which could be responsible of the M-modes assembly. The core muscles could therefore provide the necessary synergy to maintain spine stability during the balancing exercise. Finally, differences in EMG-EMG coherence suggest that the muscle synergies formed during unipedal stance tasks are different from those established during bipedal stance. PMID:26942928

  15. Multibody system of the upper limb including a reverse shoulder prosthesis.

    Science.gov (United States)

    Quental, C; Folgado, J; Ambrósio, J; Monteiro, J

    2013-11-01

    The reverse shoulder replacement, recommended for the treatment of several shoulder pathologies such as cuff tear arthropathy and fractures in elderly people, changes the biomechanics of the shoulder when compared to the normal anatomy. Although several musculoskeletal models of the upper limb have been presented to study the shoulder joint, only a few of them focus on the biomechanics of the reverse shoulder. This work presents a biomechanical model of the upper limb, including a reverse shoulder prosthesis, to evaluate the impact of the variation of the joint geometry and position on the biomechanical function of the shoulder. The biomechanical model of the reverse shoulder is based on a musculoskeletal model of the upper limb, which is modified to account for the properties of the DELTA® reverse prosthesis. Considering two biomechanical models, which simulate the anatomical and reverse shoulder joints, the changes in muscle lengths, muscle moment arms, and muscle and joint reaction forces are evaluated. The muscle force sharing problem is solved for motions of unloaded abduction in the coronal plane and unloaded anterior flexion in the sagittal plane, acquired using video-imaging, through the minimization of an objective function related to muscle metabolic energy consumption. After the replacement of the shoulder joint, significant changes in the length of the pectoralis major, latissimus dorsi, deltoid, teres major, teres minor, coracobrachialis, and biceps brachii muscles are observed for a reference position considered for the upper limb. The shortening of the teres major and teres minor is the most critical since they become unable to produce active force in this position. Substantial changes of muscle moment arms are also observed, which are consistent with the literature. As expected, there is a significant increase of the deltoid moment arms and more fibers are able to elevate the arm. The solutions to the muscle force sharing problem support the

  16. Reverse Shoulder Arthroplasty

    Medline Plus

    Full Text Available ... March 17, 2010 Welcome to this OR Live presentation, brought to you by Zimmer. Hi. I'm ... learn about shoulder replacement. You can do a skills course at the learning center that the academy ...

  17. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... with regard to longevity of total shoulders versus hips and knees. 00:46:20 GERALD WILLIAMS, MD: ... is almost ten years younger than the average hip or knee replacement patient. But if you look ...

  18. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... N. DOUGLAS BOARDMAN III, MD: That's an occupational hazard of shoulder surgery. 00:50:53 GERALD WILLIAMS, MD: That's an occupational hazard. I'm going to become disabled at some ...

  19. Reverse Shoulder Arthroplasty

    Medline Plus

    Full Text Available ... replacement. There are two basic approaches you can use for reverse shoulder replacement. The standard delto-pectoral ... surgery or a deltoid defect because you can use the same incision and repair any deltoid defects ...

  20. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available GLOBAL AP ANATOMIC TOTAL SHOULDER SYSTEM METHODIST HOSPITAL PHILADELPHIA, PA April 17, 2008 00:00:10 ANNOUNCER: DePuy Orthopedics is continually advancing the standard of orthopedic patient care. In a few ...

  1. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... MD: This is Doug Boardman from Richmond, Virginia. We're here at Methodist Hospital in Philadelphia, where ... will be performing a total shoulder arthroplasty. Before we go to Dr. Williams, I'd like to ...

  2. Reverse Shoulder Arthroplasty

    Medline Plus

    Full Text Available ... with an intact cuff, we would consider a traditional shoulder replacement. There are two basic approaches you ... less limited with the superior reverse versus the traditional. And I assume the question means the approach: ...

  3. Reverse Shoulder Arthroplasty

    Medline Plus

    Full Text Available ... reverse shoulder arthroplasty for cuff deficient arthritis. You should be aware that I helped design the system ... the delto- pectoral approach. The three features you should watch for in this video are the things ...

  4. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... do to give yourself a big break as far as glenoid exposure is concerned is to narrow ... for joint replacement in the United States by far, by almost ten years, is shoulders. So by ...

  5. Reverse Shoulder Arthroplasty

    Medline Plus

    Full Text Available ... is tight, in terms of tension? What's your thinking on that? Well, when we originally started doing ... learn about shoulder replacement. You can do a skills course at the learning center that the academy ...

  6. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... patient is a 78-year-old male who has osteoarthritis of his left shoulder. If you look ... does not have a really big inferior osteophyte. Has a little bit of proximal migration and even ...

  7. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... We had a question with regard to physical therapy after total shoulder arthroplasty: expectations and limitations. 00: ... opposite. We don't -- we do hardly any therapy at all to reverse. With reverse patients, they ...

  8. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... to a patient's unique anatomical makeup. Dr. Gerald R. Williams, Jr., a shoulder specialist from the Rothman ... That might help. Could you raise the O.R. table, please? 00:28:35 WOMAN: Can you ...

  9. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... 52 N. DOUGLAS BOARDMAN III, MD: That's an occupational hazard of shoulder surgery. 00:50:53 GERALD WILLIAMS, MD: That's an occupational hazard. I'm going to become disabled at ...

  10. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... shoulder arthroplasty. Before we go to Dr. Williams, I'd like to encourage viewers to feel free ... utilizing the buttons on your screen. And now I'll turn it over to Dr. Williams. 00: ...

  11. Reverse Shoulder Arthroplasty

    Medline Plus

    Full Text Available ... you can use for reverse shoulder replacement. The standard delto-pectoral approach, or the superior approach, which ... that are different between a reverse and a standard total is, first of all, we don't ...

  12. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... Korea. This patient is a 78-year-old male who has osteoarthritis of his left shoulder. If ... you another example: 40-year-old really muscular male weight lifter. That person's going to go back ...

  13. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... Pennsylvania, will perform the procedure, as shoulder and elbow reconstruction specialist, Dr. Douglas Boardman III will moderate. ... two weeks and don't do anything except elbow, wrist, and hand activities. At around two weeks, ...

  14. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... be performing a total shoulder arthroplasty. Before we go to Dr. Williams, I'd like to encourage ... It's always a question about how deep we go with this osteotomy. I tend to go almost ...

  15. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available GLOBAL AP ANATOMIC TOTAL SHOULDER SYSTEM METHODIST HOSPITAL PHILADELPHIA, PA April 17, 2008 00:00:10 ANNOUNCER: DePuy Orthopedics is continually advancing the standard of orthopedic patient ...

  16. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... WILLIAMS, MD: The patients that have a total shoulder replacement will come in on their first postoperative visit and tell you their pain's gone. The hemi arthroplasty without interposition will come ...

  17. Reverse Shoulder Arthroplasty

    Medline Plus

    Full Text Available ... option in the last decade for cuff deficient shoulder arthritis in the United States. The indications are a patient with painful arthritis, absent rotator cuff, a less demanding occupation ...

  18. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... to longevity of total shoulders versus hips and knees. 00:46:20 GERALD WILLIAMS, MD: Well, obviously, ... ten years younger than the average hip or knee replacement patient. But if you look at the ...

  19. Shoulder Joint Replacement

    Science.gov (United States)

    ... en because of implant loosening, wear, infection, and dislocation. When this occurs, a second joint replacement surgery — called a revision surgery — may be necessary. Is Shoulder Joint Replacement for You? The decision to have ...

  20. Reverse Shoulder Arthroplasty

    Medline Plus

    Full Text Available ... here in New York to bring you a video of a recent case of reverse shoulder arthroplasty ... helped design the system that's shown in this video, so I receive royalties and therefore have a ...

  1. Reverse Shoulder Arthroplasty

    Medline Plus

    Full Text Available ... residents and do receive compensation for that, as well. Now, reverse shoulder arthroplasty is a new option ... t see the neck of the humerus as well, but on the other hand, you have a ...

  2. Reverse Shoulder Arthroplasty

    Medline Plus

    Full Text Available ... learned that this anterior soft tissue repair is critical for the stability of the implant. And certainly, ... learn about shoulder replacement. You can do a skills course at the learning center that the academy ...

  3. Normal shoulder: MR imaging

    International Nuclear Information System (INIS)

    Relatively poor spatial resolution has been obtained in magnetic resonance (MR) imaging of the shoulder because the shoulder can only be placed in the periphery of the magnetic field. The authors have devised an anatomically shaped surface coil that enables MR to demonstrate normal shoulder anatomy in different planes with high spatial resolution. In the axial plane anatomy analogous to that seen on computed tomographic (CT) scans can be demonstrated. Variations in scapular position (produced by patient positioning) may make reproducibility of sagittal and coronal plane images difficult by changing the relationship of the plane to the shoulder anatomy. Oblique planes, for which the angle is chosen from the axial image, have the advantage of easy reproducibility. Obliquely oriented structures and relationships are best seen in oblique plane images and can be evaluated in detail

  4. Systematics of shoulder instability

    International Nuclear Information System (INIS)

    Shoulder instability is defined as a symptomatic abnormal motion of the humeral head relative to the glenoid during active shoulder motion. Glenohumeral instabilities are classified according to the causative factors as the pathogenesis of instability plays an important role with respect to treatment options. Instabilities are classified into traumatic and atraumatic instabilities as part of a multidirectional instability syndrome and into microtraumatic instabilities. For diagnostics plain radiographs (''trauma series'') are performed to document shoulder dislocation and its successful repositioning. Direct magnetic resonance (MR) arthrography is the most important imaging modality for delineation of the different injury patterns of the labral-ligamentous complex and bony structures. Monocontrast computed tomography (CT) arthrography with the use of multidetector CT scanners represents an alternative imaging modality; however, MR imaging should be preferred in the work-up of shoulder instabilities due to the mostly younger age of patients. (orig.)

  5. Radiotherapy for shoulder impingement

    International Nuclear Information System (INIS)

    Background and Purpose: Up to now, degenerative shoulder diseases were summarized by the term ''periarthritis humeroscapularis''. Actual shoulder diseases can be differentiated etiopathologically according to a primary and secondary impingement syndrome. Narrowing of the subacromial space, which is caused by an osseous shape variant, leads to primary impingement. Secondary impingement develops, when the subacromial space is reduced by swelling tissue below the osseous shoulder roof. This study aimed for the exact diagnosis to indicate therapy and to classify the results according to the Constant score. Patients and Methods: From August 1999 to September 2002, 102 patients with 115 shoulder joint conditions underwent radiation therapy (RT). All joints received two RT series (6 x 0.5 Gy/series) applied in two to three weekly fractions, totaling a dosage of 6.0 Gy (250 kV, 15 mAs, 1-mm Cu filter). The second RT course started 6 weeks after the end of the first. 115 shoulders were examined before RT, 6 weeks after the second RT course and, finally, during the follow-up from January to May 2003. Results: Pain relief was achieved in 94/115 shoulder joints (82%) after 18-month follow-up (median). A significant difference existed between secondary impingement and primary/non-impingement according to response. Tendinosis calcarea, bursitis subdeltoidea, tendovaginitis of the long biceps tendon, and capsulitis adhaesiva responded well to therapy. Conclusion: Shoulder diseases of secondary impingement demonstrate a good response to RT. Less or no benefit was found in primary impingement syndrome or complete rotator cuff disruption and acute shoulder injuries, respectively. (orig.)

  6. Histology, composition, and quality traits of chicken Pectoralis major muscle affected by wooden breast abnormality.

    Science.gov (United States)

    Soglia, F; Mudalal, S; Babini, E; Di Nunzio, M; Mazzoni, M; Sirri, F; Cavani, C; Petracci, M

    2016-03-01

    Only a few years ago, the poultry industry began to face a recent abnormality in breast meat, known as wooden breast, which frequently overlaps with white striping. This study aimed to assess the impact of wooden breast abnormality on quality traits of meat. For this purpose, 32 normal (NRM), 32 wooden (WB), and 32 wooden and white-striped (WB/WS) Pectoralis major muscles were selected from the same flock of heavy broilers (males, Ross 708, weighing around 3.7 kg) in the deboning area of a commercial processing plant at 3 h postmortem and used to assess histology, proximate (moisture, protein, fat, ash, and collagen) and mineral composition (Mg, K, P, Na and Ca), sarcoplasmic and myofibrillar protein patterns, and technological traits of breast meat. Compared to the normal group, WB/WS fillets showed more severe histological lesions characterized by fiber degeneration, fibrosis, and lipidosis, coupled with a significantly harder texture. With regard to proximate and mineral composition, abnormal samples exhibited significantly (P < 0.001) higher moisture, fat, and collagen contents coupled with lower (P < 0.001) amounts of protein and ash. Furthermore, increased calcium (131 vs. 84 mg kg(-1); P < 0.05) and sodium (741 vs. 393 mg kg(-1); P < 0.001) levels were found in WB/WS meat samples. The SDS-PAGE analysis revealed a significantly lower amount of calcium-ATPase (SERCA, 114 kDa), responsible for the translocation of Ca ions across the membrane, in normal breasts compared to abnormal ones. As for meat quality traits, fillets affected by wooden abnormality exhibited significantly (P < 0.001) higher ultimate pH and lower water-holding/water-binding capacity. In particular, compared to normal, abnormal samples showed reduced marinade uptake coupled with increased drip loss and cooking losses as well. In conclusion, this study revealed that meat affected by wooden breast or both wooden breast and white striping abnormalities exhibit poorer nutritional value, harder

  7. Eccentric contractions affect muscle membrane phospholipid fatty acid composition in rats

    DEFF Research Database (Denmark)

    Helge, Jørn Wulff; Therkildsen, K J; Jørgensen, T B;

    2001-01-01

    three groups who received chow with added fish oil (n = 8), vitamin C (n = 8) or no supplement (n = 7). After 3 weeks of feeding, calf muscles on one side were stimulated electrically during anaesthesia causing eccentric contractions. Two days later the white gastrocnemius, a part of the stimulated calf...... muscle, was excised from both legs. In the muscles stimulated to contract eccentrically, compared to the control muscles, the proportion of arachidonic acid, C20:4,n-6 (17.7 +/- 0.6; 16.4 +/- 0.4% of total fatty acids, respectively) and docosapentanoeic acid, C22:5,n-3 (2.9 +/- 0.1 and 2.7 +/- 0.1% of...... leg, and supplemental intake of fish oil or vitamin C did not attenuate this effect....

  8. Increased uncoupling protein 3 content does not affect mitochondrial function in human skeletal muscle in vivo

    OpenAIRE

    Hesselink, M.K.C.; Greenhaff, P L; Constantin-Teodosu, D.; Hultman, E; Saris, W. H. M.; Nieuwlaat, R.; Schaart, G.; Kornips, C.F.P.; P. Schrauwen

    2003-01-01

    Phosphocreatine (PCr) resynthesis rate following intense anoxic contraction can be used as a sensitive index of in vivo mitochondrial function. We examined the effect of a diet-induced increase in uncoupling protein 3 (UCP3) expression on postexercise PCr resynthesis in skeletal muscle. Nine healthy male volunteers undertook 20 one-legged maximal voluntary contractions with limb blood flow occluded to deplete muscle PCr stores. Exercise was performed following 7 days consumption of low-fat (L...

  9. Diagnosis of shoulder instability in dogs and cats: a retrospective study

    International Nuclear Information System (INIS)

    The glenohumeral joint is a remarkable articulation providing the greatest range of motion of any joint in the body. Glenohumeral stabilityresults from several mechanisms, including those that do not require expenditure of energy by muscle ('''passive mechanisms'') and those that do (''active mechanisms''). Glenohumeral instability has been recognized in 47 shoulders of 45 dogs and one cat. Cases are presented because of chronic foreleg lameness. Shoulder joint pain is obviated by theorthopedic examination. Only 57% of the involved shoulders presented with degenerative joint disease. Signs of instability are recognized under anesthesia using a craniocaudal or mediolateral drawer sign or both. This report describes the radiographic and arthroscopic findings of shoulder instability. Arthroscopy of the shoulder joint allows identification of all intra-articular pathologies. Shoulder instability notfully recognized in the past, appears to be the most common cause of shoulder lameness in the dog

  10. The Painful Shoulder: Shoulder Impingement Syndrome

    OpenAIRE

    Khan, Yousaf; Nagy, Mathias Thomas; Malal, Joby; Waseem, Mohammad

    2013-01-01

    Rotator cuff disorders are considered to be among the most common causes of shoulder pain and disability encountered in both primary and secondary care. The general pathology of subacromial impingment generally relates to a chronic repetitive process in which the conjoint tendon of the rotator cuff undergoes repetitive compression and micro trauma as it passes under the coracoacromial arch. However acute traumatic injuries may also lead to this condition. Diagnosis remains a clinical one, how...

  11. Deletion of Dicer in smooth muscle affects voiding pattern and reduces detrusor contractility and neuroeffector transmission.

    Directory of Open Access Journals (Sweden)

    Mardjaneh Karbalaei Sadegh

    Full Text Available MicroRNAs have emerged as important regulators of smooth muscle phenotype and may play important roles in pathogenesis of various smooth muscle related disease states. The aim of this study was to investigate the role of miRNAs for urinary bladder function. We used an inducible and smooth muscle specific Dicer knockout (KO mouse which resulted in significantly reduced levels of miRNAs, including miR-145, miR-143, miR-22, miR125b-5p and miR-27a, from detrusor preparations without mucosa. Deletion of Dicer resulted in a disturbed micturition pattern in vivo and reduced depolarization-induced pressure development in the isolated detrusor. Furthermore, electrical field stimulation revealed a decreased cholinergic but maintained purinergic component of neurogenic activation in Dicer KO bladder strips. The ultrastructure of detrusor smooth muscle cells was well maintained, and the density of nerve terminals was similar. Western blotting demonstrated reduced contents of calponin and desmin. Smooth muscle α-actin, SM22α and myocardin were unchanged. Activation of strips with exogenous agonists showed that depolarization-induced contraction was preferentially reduced; ATP- and calyculin A-induced contractions were unchanged. Quantitative real time PCR and western blotting demonstrated reduced expression of Cav1.2 (Cacna1c. It is concluded that smooth muscle miRNAs play an important role for detrusor contractility and voiding pattern of unrestrained mice. This is mediated in part via effects on expression of smooth muscle differentiation markers and L-type Ca(2+ channels in the detrusor.

  12. Handle Shape Affects the Grip Force Distribution and the Muscle Loadings During Power Grip Tasks.

    Science.gov (United States)

    Rossi, Jérémy; Goislard De Monsabert, Benjamin; Berton, Eric; Vigouroux, Laurent

    2015-12-01

    The objectives of this study were to investigate the effect of handle shape on the grip force distribution in the hand and on the muscle forces during maximal power grip tasks. Eleven subjects maximally grasped 3 handles with different external shapes (circular, elliptic, and double-frustum). A handle dynamometer, equipped with both a force sensor and a pressure map, was used to record the forces exerted at the hand/handle interface. The finger and wrist joint postures were also computed from synchronized kinematic measurement. These processed data were then used as input of a biomechanical hand model to estimate muscle forces. The results showed that handle shape influences the maximal grip force, the grip force distribution, and the finger joint postures. Particularly, we observed that the elliptical shape resulted in a 6.6% lower maximal grip force compared with the circular and double-frustum handle. Concomitantly, the estimated muscle forces also varied significantly according to the handle shape, with up to 48% differences for the flexor digitorum superficialis muscle for example. Interestingly, different muscle coordination strategies were observed depending on the handle shape, therefore suggesting a potential influence of these geometrical characteristics on pathological risks such as tendonitis. PMID:26214057

  13. Noggin inactivation affects the number and differentiation potential of muscle progenitor cells in vivo.

    Science.gov (United States)

    Costamagna, Domiziana; Mommaerts, Hendrik; Sampaolesi, Maurilio; Tylzanowski, Przemko

    2016-01-01

    Inactivation of Noggin, a secreted antagonist of Bone Morphogenetic Proteins (BMPs), in mice leads, among others, to severe malformations of the appendicular skeleton and defective skeletal muscle fibers. To determine the molecular basis of the phenotype, we carried out a histomorphological and molecular analysis of developing muscles Noggin(-/-) mice. We show that in 18.5 dpc embryos there is a marked reduction in muscle fiber size and a failure of nuclei migration towards the cell membrane. Molecularly, the absence of Noggin results in an increased BMP signaling in muscle tissue as shown by the increase in SMAD1/5/8 phosphorylation, concomitant with the induction of BMP target genes such as Id1, 2, 3 as well as Msx1. Finally, upon removal of Noggin, the number of mesenchymal Pax7(+) muscle precursor cells is reduced and they are more prone to differentiate into adipocytes in vitro. Thus, our results highlight the importance of Noggin/BMP balance for myogenic commitment of early fetal progenitor cells. PMID:27573479

  14. Skeletal muscle strength in older adults. Angiotensin-converting enzyme (ACE genotype affects: an UPDATE

    Directory of Open Access Journals (Sweden)

    ANA PEREIRA

    2011-06-01

    Full Text Available Problem Statement : Previous studies have associated angiotensin-converting enzyme (ACE with variability inthe skeletal muscle baseline strength, though conclusions have been inconsistent across investigations.Approach: The purpose of this study was to review the most important studies that have been exanimate thepossible association between ACE genotype and skeletal muscle baseline strength in elite male and femaleathletes involved in elderly populations. This research is needed because the possibility that the DD genotypemay be associated with a greater proportion of fast twitch fibers could explain the influence of the ACE D alleleupon strength/ power, particularly at high velocities, but this evidence remains equivocal in older people becausemore studies are necessary.Results: Thus, according to scientific evidence, changes in muscle strength with exercise training in olderindividuals may be dependent on ACE I/D genotype. Of note, the results provide a novel insight that thesegenetic variations may interact to determine muscle mass in older women specially. The determination of thispredisposition in this population, highlighting the interest of study, for the prophylactic attitude on the factorsand causes of aging (sarcopenia, osteoporosis, risk of falls, reduction of functional physical go through thisanalysis.Conclusions/Recommendations: In this work, the state of the art related to the influence of the ACE genotypeon skeletal muscle strength was presented and some important relations were reported

  15. McArdle disease does not affect skeletal muscle fibre type profiles in humans

    Directory of Open Access Journals (Sweden)

    Tertius Abraham Kohn

    2014-11-01

    Full Text Available Patients suffering from glycogen storage disease V (McArdle disease were shown to have higher surface electrical activity in their skeletal muscles when exercising at the same intensity as their healthy counterparts, indicating more muscle fibre recruitment. To explain this phenomenon, this study investigated whether muscle fibre type is shifted towards a predominance in type I fibres as a consequence of the disease. Muscle biopsies from the Biceps brachii (BB (n = 9 or Vastus lateralis (VL (n = 8 were collected over a 13-year period from male and female patients diagnosed with McArdle disease, analysed for myosin heavy chain (MHC isoform content using SDS-PAGE, and compared to healthy controls (BB: n = 3; VL: n = 10. All three isoforms were expressed and no difference in isoform expression in VL was found between the McArdle patients and healthy controls (MHC I: 33±19% vs. 43±7%; MHC IIa: 52±9% vs. 40±7%; MHC IIx: 15±18% vs. 17±9%. Similarly, the BB isoform content was also not different between the two groups (MHC I: 33±14% vs. 30±11%; MHC IIa: 46±17% vs. 39±5%; MHC IIx: 21±13% vs. 31±14%. In conclusion, fibre type distribution does not seem to explain the higher surface EMG in McArdle patients. Future studies need to investigate muscle fibre size and contractility of McArdle patients.

  16. Effect of Targeted Strength, Endurance, and Coordination Exercise on Neck and Shoulder Pain Among Fighter Pilots

    DEFF Research Database (Denmark)

    Lange, Britt; Toft, Palle; Myburgh, Corrie;

    2013-01-01

    : To explore in Danish F-16 pilots: (1) the effect on neck and shoulder pain of a 24-week training intervention including targeted training of the deep neck muscles; (2) selected clinical signs and symptoms at baseline; (3) the prevalence and intensity of neck and shoulder pain....

  17. Physical capacity in relation to low back, neck, or shoulder pain in a working population

    NARCIS (Netherlands)

    Hamberg - Reenen, H.H. van; Ariëns, G.A.M.; Blatter, B.M.; Twisk, J.W.R.; Mechelen, W. van; Bongers, P.M.

    2006-01-01

    Aims: To investigate the longitudinal relation between physical capacity (isokinetic lifting strength, static endurance of the back, neck, and shoulder muscles, and mobility of the spine) and low back, neck, and shoulder pain. Methods: In this prospective cohort study, 1789 Dutch workers participate

  18. Myositis ossificans around shoulder following military training programme

    Directory of Open Access Journals (Sweden)

    Mustafa C Kir

    2011-01-01

    Full Text Available The myositis ossificans around shoulder in military recruits are not reported yet. Three young male soldiers presented with complaints of palpable mass at the anterior aspect of shoulder; tenderness around the superior part of deltopectoral groove close to acromioclavicular joint; and restriction of shoulder motion. They also noticed ecchymosis and pain around the coracoid process and anterior shoulder region during regular firing exercises. Plain X-rays and computerized tomography showed extra-capsular, dense, irregular structure in the space between pectoralis and deltoid muscles which correlated with heterotopic bone. One patient refused surgical intervention because of the completion of his military serving period. Surgical excision was performed for the other two patients. During surgical exploration, both ossified masses were found in deltopectoral region and mostly in fibers of clavicular and acromial parts of deltoid muscle. Pathological reports confirmed the structure of masses as mature trabecular bone. Postoperatively indomethacin treatment and active shoulder exercises were started until the full range of motion was regained. Mini soft bag was used on the rifle contact area of the shoulder. No complications or recurrences were observed during the 24 months of followup period.

  19. AHNAK1 and AHNAK2 are costameric proteins: AHNAK1 affects transverse skeletal muscle fiber stiffness

    International Nuclear Information System (INIS)

    Research highlights: → AHNAK1 and AHNAK2 are costameric proteins. → Intact membrane repair in AHNAK1-deficient mice. → AHNAK1-/- single fibers have a higher transverse stiffness. -- Abstract: The AHNAK scaffold PDZ-protein family is implicated in various cellular processes including membrane repair; however, AHNAK function and subcellular localization in skeletal muscle are unclear. We used specific AHNAK1 and AHNAK2 antibodies to analyzed the detailed localization of both proteins in mouse skeletal muscle. Co-localization of AHNAK1 and AHNAK2 with vinculin clearly demonstrates that both proteins are components of the costameric network. In contrast, no AHNAK expression was detected in the T-tubule system. A laser wounding assay with AHNAK1-deficient fibers suggests that AHNAK1 is not involved in membrane repair. Using atomic force microscopy (AFM), we observed a significantly higher transverse stiffness of AHNAK1-/- fibers. These findings suggest novel functions of AHNAK proteins in skeletal muscle.

  20. Using your shoulder after replacement surgery

    Science.gov (United States)

    Joint replacement surgery - using your shoulder; Shoulder replacement surgery - after ... You have had shoulder replacement surgery to replace the bones of your shoulder joint with artificial parts. The parts include a stem made ...

  1. MRI of rotator cuff muscle atrophy in relation to glenohumeral joint incongruence in brachial plexus birth injury

    Energy Technology Data Exchange (ETDEWEB)

    Poeyhiae, Tiina H. [Helsinki University Central Hospital, Department of Radiology, PO Box 281, Helsinki (Finland); Helsinki University Central Hospital, Hospital for Children and Adolescents, Helsinki (Finland); Nietosvaara, Yrjaenae A.; Peltonen, Jari I. [Helsinki University Central Hospital, Hospital for Children and Adolescents, Helsinki (Finland); Remes, Ville M. [Helsinki University Central Hospital, Department of Orthopaedics, Surgical Hospital, Helsinki (Finland); Kirjavainen, Mikko O. [Helsinki University Central Hospital, Department of Orthopaedics and Traumatology, Helsinki (Finland); Lamminen, Antti E. [Helsinki University Central Hospital, Department of Radiology, PO Box 281, Helsinki (Finland)

    2005-04-01

    Purpose: To evaluate rotator cuff muscles and the glenohumeral (GH) joint in brachial plexus birth injury (BPBI) using MRI and to determine whether any correlation exists between muscular abnormality and the development of glenoid dysplasia and GH joint incongruity. Thirty-nine consecutive BPBI patients with internal rotation contracture or absent active external rotation of the shoulder joint were examined clinically and imaged with MRI. In the physical examination, passive external rotation was measured to evaluate internal rotation contracture. Both shoulders were imaged and the glenoscapular angle, percentage of humeral head anterior to the middle of the glenoid fossa (PHHA) and the greatest thickness of the subscapular, infraspinous and supraspinous muscles were measured. The muscle ratio between the affected side and the normal side was calculated to exclude age variation in the assessment of muscle atrophy. All muscles of the rotator cuff were atrophic, with the subscapular and infraspinous muscles being most severely affected. A correlation was found between the percentage of humeral head anterior to the middle of the glenoid fossa (PHHA) and the extent of subscapular muscle atrophy (r{sub s}=0.45, P=0.01), as well as between its ratio (r{sub s}=0.5, P P=0.01). Severity of rotator cuff muscle atrophy correlated with increased glenoid retroversion and the degree of internal rotation contracture. Glenoid retroversion and subluxation of the humeral head are common in patients with BPBI. All rotator cuff muscles are atrophic, especially the subscapular muscle. Muscle atrophy due to neurogenic damage apparently results in an imbalance of the shoulder muscles and progressive retroversion and subluxation of the GH joint, which in turn lead to internal rotation contracture and deformation of the joint. (orig.)

  2. MRI of rotator cuff muscle atrophy in relation to glenohumeral joint incongruence in brachial plexus birth injury

    International Nuclear Information System (INIS)

    Purpose: To evaluate rotator cuff muscles and the glenohumeral (GH) joint in brachial plexus birth injury (BPBI) using MRI and to determine whether any correlation exists between muscular abnormality and the development of glenoid dysplasia and GH joint incongruity. Thirty-nine consecutive BPBI patients with internal rotation contracture or absent active external rotation of the shoulder joint were examined clinically and imaged with MRI. In the physical examination, passive external rotation was measured to evaluate internal rotation contracture. Both shoulders were imaged and the glenoscapular angle, percentage of humeral head anterior to the middle of the glenoid fossa (PHHA) and the greatest thickness of the subscapular, infraspinous and supraspinous muscles were measured. The muscle ratio between the affected side and the normal side was calculated to exclude age variation in the assessment of muscle atrophy. All muscles of the rotator cuff were atrophic, with the subscapular and infraspinous muscles being most severely affected. A correlation was found between the percentage of humeral head anterior to the middle of the glenoid fossa (PHHA) and the extent of subscapular muscle atrophy (rs=0.45, P=0.01), as well as between its ratio (rs=0.5, P P=0.01). Severity of rotator cuff muscle atrophy correlated with increased glenoid retroversion and the degree of internal rotation contracture. Glenoid retroversion and subluxation of the humeral head are common in patients with BPBI. All rotator cuff muscles are atrophic, especially the subscapular muscle. Muscle atrophy due to neurogenic damage apparently results in an imbalance of the shoulder muscles and progressive retroversion and subluxation of the GH joint, which in turn lead to internal rotation contracture and deformation of the joint. (orig.)

  3. Shoulder impingement syndrome in relation to shoulder intensive work

    OpenAIRE

    Frost, P.; Andersen, J H

    1999-01-01

    OBJECTIVES: To analyse the risk of shoulder impingement syndrome relative to shoulder intensive work. METHODS: A cross sectional study of a historical cohort of 1591 workers employed between 1986 and 1993 at a slaughterhouse or a chemical factory. Workers not doing tasks in slaughtering or meat processing constituted the reference group. Intensity of shoulder work in meat processing tasks was assessed by video based observations. Information on shoulder disorders was collected by quest...

  4. Prevalence of shoulder pain after stroke and associated factors

    Directory of Open Access Journals (Sweden)

    M.J. Hadianfar

    2008-01-01

    Full Text Available AbstractBackground and Purpose: Shoulder pain is a common complication from stroke that may cause some rehabilitation limits to achieve functional goals. The information regarding its prevalence and associated factors is limited. This study was conducted to investigate further details pertaining to its associated factors.Materials and Methods: This study was performed on 191 stroke patients at the Physical Medicine and Rehabilitation Ward at Shiraz-Medical School from 2001 to 2004. Each patient was followed up for one year. A questionnaire was prepared containing information about shoulder pain compliant, thorough history and physical examination, previous history of open heart surgery, scoliosis, limited neck range of motion, type of stroke (based on MRI and brain CT, osteoporosis (based on bone mineral density and X ray, shoulder adductor muscles and biceps spasticity (based on ashworth scale. In follow-up visits bi-monthly for one year, the questionnaire was filled out again and if present, shoulder pain was recorded.Results: Most patients developed shoulder pain between 2 and 6 months following their stroke. Forty-nine patients (32.2% developed shoulder pain, 39(79.6% of whom had spastic tone and 8 (16.3% had flaccid tone. In both groups, with shoulder pain and without shoulder pain respectively, 6.7% and 1.9% had a history of open heart surgery, 6.1% and 1% had scoliosis, 67.3% and 35.1% had Intracranial hemorrhage, 73.5% and 23.3% had limited neck range of motion, and 24.5% and 35% had osteopenia.Conclusion: Spasticity was significantly more common in the shoulder pain group, which can be due to capsulitis, soft tissue inflammation (especially ligament and rotator cuff muscle and anteroinferior subluxation of the shoulder. There was a significant statistical correlation between intracranial hemorrhage, reduced neck range of motion, and hemiplegic shoulder pain. It appears that treatment and rehabilitation of spasticity and underlying

  5. Spinal muscle activity in simulated rugby union scrummaging is affected by different engagement conditions.

    Science.gov (United States)

    Cazzola, D; Stone, B; Holsgrove, T P; Trewartha, G; Preatoni, E

    2016-04-01

    Biomechanical studies of rugby union scrummaging have focused on kinetic and kinematic analyses, while muscle activation strategies employed by front-row players during scrummaging are still unknown. The aim of the current study was to investigate the activity of spinal muscles during machine and live scrums. Nine male front-row forwards scrummaged as individuals against a scrum machine under "crouch-touch-set" and "crouch-bind-set" conditions, and against a two-player opposition in a simulated live condition. Muscle activities of the sternocleidomastoid, upper trapezius, and erector spinae were measured over the pre-engagement, engagement, and sustained-push phases. The "crouch-bind-set" condition increased muscle activity of the upper trapezius and sternocleidomastoid before and during the engagement phase in machine scrummaging. During the sustained-push phase, live scrummaging generated higher activities of the erector spinae than either machine conditions. These results suggest that the pre-bind, prior to engagement, may effectively prepare the cervical spine by stiffening joints before the impact phase. Additionally, machine scrummaging does not replicate the muscular demands of live scrummaging for the erector spinae, and for this reason, we advise rugby union forwards to ensure scrummaging is practiced in live situations to improve the specificity of their neuromuscular activation strategies in relation to resisting external loads. PMID:25818526

  6. Muscle structure and innervation are affected by loss of Dorsal in the fruit fly, Drosophila melanogaster.

    Science.gov (United States)

    Cantera, R; Kozlova, T; Barillas-Mury, C; Kafatos, F C

    1999-02-01

    In Drosophila, the Rel-protein Dorsal and its inhibitor, Cactus, act in signal transduction pathways that control the establishment of dorsoventral polarity during embryogenesis and the immune response during postembryonic life. Here we present data indicating that Dorsal is also involved in the control of development and maintenance of innervation in somatic muscles. Dorsal and Cactus are colocalized in all somatic muscles during postembryonic development. In larvae and adults, these proteins are distributed at low levels in the cytoplasm and nuclei and at much higher levels in the postsynaptic component of glutamatergic neuromuscular junctions. Absence of Dorsal, in homozygous dorsal mutant larvae results in muscle misinsertions, duplications, nuclear hypotrophy, disorganization of actin bundles, and altered subcellular distribution of Cactus. Some muscles show very abnormal neuromuscular junctions, and some motor axon terminals are transformed into growth cone-like structures embedded in synaptotagmin-enriched vesicles. The detailed phenotype suggests a role of Dorsal signalling in the maintenance and plasticity of the NMJ. PMID:10192771

  7. Rapid increase in training load affects markers of skeletal muscle damage and mechanical performance.

    Science.gov (United States)

    Kamandulis, Sigitas; Snieckus, Audrius; Venckunas, Tomas; Aagaard, Per; Masiulis, Nerijus; Skurvydas, Albertas

    2012-11-01

    The aim of this study was to monitor the changes in indirect markers of muscle damage during 3 weeks (9 training sessions) of stretch-shortening (drop jump) exercise with constant load alternated with steep increases in load. Physically active men (n = 9, mean age 19.1 years) performed a program involving a rapid stepwise increase in the number of jumps, drop height, and squat depth, and the addition of weight. Concentric, isometric maximal voluntary contraction (MVC), and stimulated knee extension torque were measured before and 10 minutes after each session. Muscle soreness and plasma creatine kinase activity were assessed after each session. Steep increments in stretch-shortening exercise load in sessions 4 and 7 amplified the postexercise decrease in stimulated muscle torque and slightly increased muscle soreness but had a minimal effect on the recovery of MVC and stimulated torque. Maximal jump height increased by 7.8 ± 6.3% (p training session, respectively. Gains in isometric knee extension MVC (7.9 ± 8.2%) and 100-Hz-evoked torque (9.9 ± 9.6%) (both p training. The magnitude of improvement was greater after this protocol than that induced by a continuous constant progression loading pattern with small gradual load increments in each training session. These findings suggest that plyometric training using infrequent but steep increases in loading intensity and volume may be beneficial to athletic performance. PMID:22158097

  8. Ecdysteroids affect in vivo protein metabolism of the flight muscle of the tobacco hornworm (Manduca sexta)

    Science.gov (United States)

    Tischler, M. E.; Wu, M.; Cook, P.; Hodsden, S.

    1990-01-01

    Ecdysteroid growth promotion of the dorsolongitudinal flight muscle of Manduca sexta was studied by measuring in vivo protein metabolism using both "flooding-dose" and "non-carrier" techniques. These procedures differ in that the former method includes injection of non-labelled phenylalanine (30 micromoles/insect) together with the [3H]amino acid. Injected radioactivity plateaued in the haemolymph within 7 min. With the flooding-dose method, haemolymph and intramuscular specific radioactivities were similar between 15 min and 2 h. Incorporation of [3H]phenylalanine into muscle protein was linear with either method between 30 and 120 min. Fractional rates (%/12 h) of synthesis with the flooding-dose technique were best measured after 1 h because of the initial delay in radioactivity equilibration. Estimation of body phenylalanine turnover with the non-carrier method showed 24-53%/h which was negligible with the flooding-dose method. Since the two methods yielded similar rates of protein synthesis, the large injection of non-labelled amino acid did not alter the rate of synthesis. Because the flooding-dose technique requires only a single time point measurement, it is the preferred method. The decline and eventual cessation of flight-muscle growth was mostly a consequence of declining protein synthesis though degradation increased between 76-86 h before eclosion and was relatively rapid. This decline in muscle growth could be prevented by treating pupae with 20-hydroxyecdysone (10 micrograms/insect). Protein accretion was promoted by a decline of up to 80% in protein breakdown, which was offset in part by a concurrent though much smaller decrease in protein synthesis. Therefore, ecdysteroids may increase flight-muscle growth by inhibiting proteolysis.

  9. Protocol for Shoulder function training reducing musculoskeletal pain in shoulder and neck: a randomized controlled trial

    OpenAIRE

    Mortensen Ole S; Andersen Lars L; Andersen Christoffer H; Zebis Mette K; Sjøgaard Gisela

    2011-01-01

    Abstract Background Neck and shoulder complaints are common among employees in sedentary occupations characterized by intensive computer use. Such musculoskeletal pain - which is often associated with restricted range of motion and loss of muscle strength - is one of the most common conditions treated by physical therapists. The exact mechanism of neck pain is rarely revealed by clinical examination and the treatment has varied from passive rest to active treatments. Active treatments have of...

  10. Arthroscopic findings after shoulder dislocation

    OpenAIRE

    Medenica Ivica; Radunović Aleksandar; Madžarac Dragan; Zorić Miodrag; Bokonjić Dubravko; Stojković Bratislav

    2009-01-01

    Background/Aim. Recurrent instability of the shoulder joint is frequently difficult to differentiate from diseased or injured rotator cuff or tendon of the forearm flexor (m. biceps brachii). Shoulder joint arthroscopy has been only recently introduced into instable shoulder joint lesion examination. The aim of this study was to present and analyze an arthroscopic finding on instable shoulder joint in order to determine causes and mechanisms of instability, as well as principles of surgical t...

  11. The Danish Shoulder Arthroplasty Registry

    DEFF Research Database (Denmark)

    Rasmussen, Jeppe; Jakobsen, John; Brorson, Stig;

    2012-01-01

    The Danish Shoulder Arthroplasty Registry (DSR) was established in 2004. Data are reported electronically by the surgeons. Patient-reported outcome is collected 10-14 months postoperatively using the Western Ontario osteoarthritis of the shoulder index (WOOS). 2,137 primary shoulder arthroplasties...

  12. Changes in muscle force-length properties affect the early rise of force in vivo

    DEFF Research Database (Denmark)

    Blazevich, Anthony J; Cannavan, Dale; Horne, Sara;

    2009-01-01

    training-induced shifts in the moment-angle relation and changes in RFD measured to 30 ms (i.e., early) and 200 ms (i.e., late) from the onset of isometric knee extension force were examined; shifts in the moment-angle relation were used as an overall measure of changes in quadriceps muscle fascicle length....... A significant proportion of the variance in RFD measured only in the initial contraction phase (0-30 ms) could be explained by shifts in the moment-angle relation (r=-0.66-0.71; R2=0.44-0.50). Training-induced increases in muscle fascicle length may lead to a reduced or complete lack of adaptive...... gains in contractile RFD, especially in the early contraction phase....

  13. Pain in the neck and shoulder joint in a rheumatologist's practice

    Directory of Open Access Journals (Sweden)

    Yuri Aleksandrovich Olyunin

    2012-01-01

    Full Text Available Diseases accompanied by pain in the neck and shoulder joint are rather numerous, frequently result in permanent functional failure, and are encountered in a considerable number of patients followed up by rheumatologists, neurologists, orthopedics, and therapists. The frequency of these impairments may vary from 7 to 47% according to the characteristics of the study population and used definition. The list of nosological entities to be excluded in the differential diagnosis includes diseases caused by lesions in the cervical spinal area, its muscles, ligaments, and tendons, neurological changes, systemic inflammatory diseases, myofascial pain syndrome, as well as diseases that can induce referred pain in the neck and shoulder joint (pneumonia, coronary heart disease, gastroduodenal ulcer disease. To follow a sparing regimen plays a large role in the treatment of soft tissue diseases in the shoulder joint. The use of analgesics, primarily nonsteroidal anti-inflammatory drugs (NSAIDs, such as nimesulide (nayz, is an important component of therapy. The drug has been successfully used for back pain, osteoarthrosis, and extraarticular soft tissue diseases. The local administration of glucocorticoids is worth consideration if a reduced load on the affected area and the use of NSAIDs produce no desirable effect.

  14. Pain in the neck and shoulder joint in a rheumatologist's practice

    Directory of Open Access Journals (Sweden)

    Yuri Aleksandrovich Olyunin

    2012-09-01

    Full Text Available Diseases accompanied by pain in the neck and shoulder joint are rather numerous, frequently result in permanent functional failure, and are encountered in a considerable number of patients followed up by rheumatologists, neurologists, orthopedics, and therapists. The frequency of these impairments may vary from 7 to 47% according to the characteristics of the study population and used definition. The list of nosological entities to be excluded in the differential diagnosis includes diseases caused by lesions in the cervical spinal area, its muscles, ligaments, and tendons, neurological changes, systemic inflammatory diseases, myofascial pain syndrome, as well as diseases that can induce referred pain in the neck and shoulder joint (pneumonia, coronary heart disease, gastroduodenal ulcer disease. To follow a sparing regimen plays a large role in the treatment of soft tissue diseases in the shoulder joint. The use of analgesics, primarily nonsteroidal anti-inflammatory drugs (NSAIDs, such as nimesulide (nayz, is an important component of therapy. The drug has been successfully used for back pain, osteoarthrosis, and extraarticular soft tissue diseases. The local administration of glucocorticoids is worth consideration if a reduced load on the affected area and the use of NSAIDs produce no desirable effect.

  15. Evaluation of muscular activity duration in shoulders with rotator cuff tears using inertial sensors and electromyography

    International Nuclear Information System (INIS)

    Shoulder disorders, including rotator cuff tears, affect the shoulder function and result in adapted muscle activation. Although these adaptations have been studied in controlled conditions, free-living activities have not been investigated. Based on the kinematics measured with inertial sensors and portable electromyography, the objectives of this study were to quantify the duration of the muscular activation in the upper trapezius (UT), medial deltoid (MD) and biceps brachii (BB) during motion and to investigate the effect of rotator cuff tear in laboratory settings and daily conditions. The duration of movements and muscular activations were analysed separately and together using the relative time of activation (TEMG/mov). Laboratory measurements showed the parameter’s reliability through movement repetitions (ICC > 0.74) and differences in painful shoulders compared with healthy ones (p < 0.05): longer activation for UT; longer activation for MD during abduction and tendency to shorter activation in other movements; shorter activation for BB. In daily conditions, TEMG/mov for UT was longer, whereas it was shorter for MD and BB (p < 0.05). Moreover, significant correlations were observed between these parameters and clinical scores. This study thus provides new insights into the rotator cuff tear effect on duration of muscular activation in daily activity. (paper)

  16. Type of Ground Surface during Plyometric Training Affects the Severity of Exercise-Induced Muscle Damage

    Directory of Open Access Journals (Sweden)

    Hamid Arazi

    2016-03-01

    Full Text Available The purpose of this study was to compare the changes in the symptoms of exercise-induced muscle damage from a bout of plyometric exercise (PE; 10 × 10 vertical jumps performed in aquatic, sand and firm conditions. Twenty-four healthy college-aged men were randomly assigned to one of three groups: Aquatic (AG, n = 8, Sand (SG, n = 8 and Firm (FG, n = 8. The AG performed PE in an aquatic setting with a depth of ~130 cm. The SG performed PE on a dry sand surface at a depth of 20 cm, and the FG performed PE on a 10-cm-thick wooden surface. Plasma creatine kinase (CK activity, delayed onset muscle soreness (DOMS, knee range of motion (KROM, maximal isometric voluntary contraction (MIVC of the knee extensors, vertical jump (VJ and 10-m sprint were measured before and 24, 48 and 72 h after the PE. Compared to baseline values, FG showed significantly (p < 0.05 greater changes in CK, DOMS, and VJ at 24 until 48 h. The MIVC decreased significantly for the SG and FG at 24 until 48 h post-exercise in comparison to the pre-exercise values. There were no significant (p > 0.05 time or group by time interactions in KROM. In the 10-m sprint, all the treatment groups showed significant (p < 0.05 changes compared to pre-exercise values at 24 h, and there were no significant (p > 0.05 differences between groups. The results indicate that PE in an aquatic setting and on a sand surface induces less muscle damage than on a firm surface. Therefore, training in aquatic conditions and on sand may be beneficial for the improvement of performance, with a concurrently lower risk of muscle damage and soreness.

  17. Angular Velocity Affects Trunk Muscle Strength and EMG Activation during Isokinetic Axial Rotation

    OpenAIRE

    Jian-Zhong Fan; Xia Liu; Guo-Xin Ni

    2014-01-01

    Objective. To evaluate trunk muscle strength and EMG activation during isokinetic axial rotation at different angular velocities. Method. Twenty-four healthy young men performed isokinetic axial rotation in right and left directions at 30, 60, and 120 degrees per second angular velocity. Simultaneously, surface EMG was recorded on external oblique (EO), internal oblique (IO), and latissimus dorsi (LD) bilaterally. Results. In each direction, with the increase of angular velocity, peak torque ...

  18. Age and Diet Affect Gene Expression Profile in Canine Skeletal Muscle

    OpenAIRE

    Middelbos, Ingmar S.; Brittany M Vester; Lisa K Karr-Lilienthal; Schook, Lawrence B; Swanson, Kelly S.

    2009-01-01

    We evaluated gene transcription in canine skeletal muscle (biceps femoris) using microarray analysis to identify effects of age and diet on gene expression. Twelve female beagles were used (six 1-year olds and six 12-year olds) and they were fed one of two experimental diets for 12 months. One diet contained primarily plant-based protein sources (PPB), whereas the second diet contained primarily animal-based protein sources (APB). Affymetrix GeneChip Canine Genome Arrays were used to hybridiz...

  19. Identification of Common Regulators of Genes in Co-Expression Networks Affecting Muscle and Meat Properties

    OpenAIRE

    Siriluck Ponsuksili; Puntita Siengdee; Yang Du; Nares Trakooljul; Eduard Murani; Manfred Schwerin; Klaus Wimmers

    2015-01-01

    Understanding the genetic contributions behind skeletal muscle composition and metabolism is of great interest in medicine and agriculture. Attempts to dissect these complex traits combine genome-wide genotyping, expression data analyses and network analyses. Weighted gene co-expression network analysis (WGCNA) groups genes into modules based on patterns of co-expression, which can be linked to phenotypes by correlation analysis of trait values and the module eigengenes, i.e. the first princi...

  20. Neural crest does not contribute to the neck and shoulder in the axolotl (Ambystoma mexicanum.

    Directory of Open Access Journals (Sweden)

    Hans-Henning Epperlein

    Full Text Available BACKGROUND: A major step during the evolution of tetrapods was their transition from water to land. This process involved the reduction or complete loss of the dermal bones that made up connections to the skull and a concomitant enlargement of the endochondral shoulder girdle. In the mouse the latter is derived from three separate embryonic sources: lateral plate mesoderm, somites, and neural crest. The neural crest was suggested to sustain the muscle attachments. How this complex composition of the endochondral shoulder girdle arose during evolution and whether it is shared by all tetrapods is unknown. Salamanders that lack dermal bone within their shoulder girdle were of special interest for a possible contribution of the neural crest to the endochondral elements and muscle attachment sites, and we therefore studied them in this context. RESULTS: We grafted neural crest from GFP+ fluorescent transgenic axolotl (Ambystoma mexicanum donor embryos into white (d/d axolotl hosts and followed the presence of neural crest cells within the cartilage of the shoulder girdle and the connective tissue of muscle attachment sites of the neck-shoulder region. Strikingly, neural crest cells did not contribute to any part of the endochondral shoulder girdle or to the connective tissue at muscle attachment sites in axolotl. CONCLUSIONS: Our results in axolotl suggest that neural crest does not serve a general function in vertebrate shoulder muscle attachment sites as predicted by the "muscle scaffold theory," and that it is not necessary to maintain connectivity of the endochondral shoulder girdle to the skull. Our data support the possibility that the contribution of the neural crest to the endochondral shoulder girdle, which is observed in the mouse, arose de novo in mammals as a developmental basis for their skeletal synapomorphies. This further supports the hypothesis of an increased neural crest diversification during vertebrate evolution.

  1. Comparative Label-Free Mass Spectrometric Analysis of Mildly versus Severely Affected mdx Mouse Skeletal Muscles Identifies Annexin, Lamin, and Vimentin as Universal Dystrophic Markers

    Directory of Open Access Journals (Sweden)

    Ashling Holland

    2015-06-01

    Full Text Available The primary deficiency in the membrane cytoskeletal protein dystrophin results in complex changes in dystrophic muscles. In order to compare the degree of secondary alterations in differently affected subtypes of skeletal muscles, we have conducted a global analysis of proteome-wide changes in various dystrophin-deficient muscles. In contrast to the highly degenerative mdx diaphragm muscle, which showed considerable alterations in 35 distinct proteins, the spectrum of mildly to moderately dystrophic skeletal muscles, including interosseus, flexor digitorum brevis, soleus, and extensor digitorum longus muscle, exhibited a smaller number of changed proteins. Compensatory mechanisms and/or cellular variances may be responsible for differing secondary changes in individual mdx muscles. Label-free mass spectrometry established altered expression levels for diaphragm proteins associated with contraction, energy metabolism, the cytoskeleton, the extracellular matrix and the cellular stress response. Comparative immunoblotting verified the differences in the degree of secondary changes in dystrophin-deficient muscles and showed that the up-regulation of molecular chaperones, the compensatory increase in proteins of the intermediate filaments, the fibrosis-related increase in collagen levels and the pathophysiological decrease in calcium binding proteins is more pronounced in mdx diaphragm as compared to the less severely affected mdx leg muscles. Annexin, lamin, and vimentin were identified as universal dystrophic markers.

  2. Angular Velocity Affects Trunk Muscle Strength and EMG Activation during Isokinetic Axial Rotation

    Directory of Open Access Journals (Sweden)

    Jian-Zhong Fan

    2014-01-01

    Full Text Available Objective. To evaluate trunk muscle strength and EMG activation during isokinetic axial rotation at different angular velocities. Method. Twenty-four healthy young men performed isokinetic axial rotation in right and left directions at 30, 60, and 120 degrees per second angular velocity. Simultaneously, surface EMG was recorded on external oblique (EO, internal oblique (IO, and latissimus dorsi (LD bilaterally. Results. In each direction, with the increase of angular velocity, peak torque decreased, whereas peak power increased. During isokinetic axial rotation, contralateral EO as well as ipsilateral IO and LD acted as primary agonists, whereas, ipsilateral EO as well as contralateral IO and LD acted as primary antagonistic muscles. For each primary agonist, the root mean square values decreased with the increase of angular velocity. Antagonist coactiviation was observed at each velocity; however, it appears to be higher with the increase of angular velocity. Conclusion. Our results suggest that velocity of rotation has great impact on the axial rotation torque and EMG activity. An inverse relationship of angular velocity was suggested with the axial rotation torque as well as root mean square value of individual trunk muscle. In addition, higher velocity is associated with higher coactivation of antagonist, leading to a decrease in torque with the increase of velocity.

  3. Iron Content Affects Lipogenic Gene Expression in the Muscle of Nelore Beef Cattle

    Science.gov (United States)

    Diniz, Wellison Jarles da Silva; Coutinho, Luiz Lehmann; Tizioto, Polyana Cristine; Cesar, Aline Silva Mello; Gromboni, Caio Fernando; Nogueira, Ana Rita Araújo; de Oliveira, Priscila Silva Neubern; de Souza, Marcela Maria

    2016-01-01

    Iron (Fe) is an essential mineral for metabolism and plays a central role in a range of biochemical processes. Therefore, this study aimed to identify differentially expressed (DE) genes and metabolic pathways in Longissimus dorsi (LD) muscle from cattle with divergent iron content, as well as to investigate the likely role of these DE genes in biological processes underlying beef quality parameters. Samples for RNA extraction for sequencing and iron, copper, manganese, and zinc determination were collected from LD muscles at slaughter. Eight Nelore steers, with extreme genomic estimated breeding values for iron content (Fe-GEBV), were selected from a reference population of 373 animals. From the 49 annotated DE genes (FDR<0.05) found between the two groups, 18 were up-regulated and 31 down-regulated for the animals in the low Fe-GEBV group. The functional enrichment analyses identified several biological processes, such as lipid transport and metabolism, and cell growth. Lipid metabolism was the main pathway observed in the analysis of metabolic and canonical signaling pathways for the genes identified as DE, including the genes FASN, FABP4, and THRSP, which are functional candidates for beef quality, suggesting reduced lipogenic activities with lower iron content. Our results indicate metabolic pathways that are partially influenced by iron, contributing to a better understanding of its participation in skeletal muscle physiology. PMID:27532424

  4. Low-level lasers affect uncoupling protein gene expression in skin and skeletal muscle tissues

    Science.gov (United States)

    Canuto, K. S.; Sergio, L. P. S.; Paoli, F.; Mencalha, A. L.; Fonseca, A. S.

    2016-03-01

    Wavelength, frequency, power, fluence, and emission mode determine the photophysical, photochemical, and photobiological responses of biological tissues to low-level lasers. Free radicals are involved in these responses acting as second messengers in intracellular signaling processes. Irradiated cells present defenses against these chemical species to avoid unwanted effects, such as uncoupling proteins (UCPs), which are part of protective mechanisms and minimize the effects of free radical generation in mitochondria. In this work UCP2 and UCP3 mRNA gene relative expression in the skin and skeletal muscle tissues of Wistar rats exposed to low-level red and infrared lasers was evaluated. Samples of the skin and skeletal muscle tissue of Wistar rats exposed to low-level red and infrared lasers were withdrawn for total RNA extraction, cDNA synthesis, and the evaluation of gene expression by quantitative polymerase chain reaction. UCP2 and UCP3 mRNA expression was differently altered in skin and skeletal muscle tissues exposed to lasers in a wavelength-dependent effect, with the UCP3 mRNA expression dose-dependent. Alteration on UCP gene expression could be part of the biostimulation effect and is necessary to make cells exposed to red and infrared low-level lasers more resistant or capable of adapting in damaged tissues or diseases.

  5. COMPARING EFFECT OF SHOULDER CUFF SUPPORT VERSUS SHOULDER STRAPPING IN PREVENTING POST STROKE SHOULDER PAIN

    OpenAIRE

    Parvinder kaur; Shiv Kumar Verma; Ravinder Narwal

    2013-01-01

    Aims and Objectives:The aim of research is to compare the effectiveness of shoulder cuff support versusshoulder strapping.Methodology:A sample of 20 strokesubjects was recruited for the study. The subjectwere randomly dividedin to 2 groups Group A ( shoulder cuff group) and Group B (shoulder strapping group).Pre test assessment was done by Visual analogue scale & pain free range of motion to 900degree. A receivedshoulder cuff and group B received shoulder strapping in their rehabilitation pro...

  6. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... AP ANATOMIC TOTAL SHOULDER SYSTEM METHODIST HOSPITAL PHILADELPHIA, PA April 17, 2008 00:00:10 ANNOUNCER: DePuy ... you don't make a bunch of small passes at the lesser tuberosity and make it a ...

  7. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... April 17, 2008 00:00:10 ANNOUNCER: DePuy Orthopedics is continually advancing the standard of orthopedic patient care. In a few moments, you'll ... Methodist Hospital in Philadelphia. A revolution in shoulder orthopedics, the Global AP gives surgeons a wide array ...

  8. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... to longevity of total shoulders versus hips and knees. 00:46:20 GERALD WILLIAMS, MD: Well, obviously, if you look at -- it depends upon who you put them in. First of all, the young-- the youngest patient population for joint replacement in the United States by far, by ...

  9. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... from South Korea. This patient is a 78-year-old male who has osteoarthritis of his left shoulder. If ... some pain relief. Give you another example: 40-year-old really muscular male weight lifter. That person's going to go back ...

  10. Exercise and Shoulder Pain

    Science.gov (United States)

    ... and disability • Fractures: A break in a bone • Dislocations/subluxations: Complete or partial separation of bones within the joint • Sprains: Stretch/damage to ligaments and connective tissue within the joint • Frozen Shoulder: Stiffness & loss of movement; a tight connective joint ...

  11. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... Erika, she must've left. She got scared. Kevin from DePuy. And we have Dr. Song visiting us from South Korea. This patient is a 78-year-old male who has osteoarthritis of his left shoulder. If you look at his AP view here, what we can see is that he doesn't have quite the ...

  12. Mortality after shoulder arthroplasty

    DEFF Research Database (Denmark)

    Amundsen, Alexander; Rasmussen, Jeppe Vejlgaard; Olsen, Bo Sanderhoff;

    2016-01-01

    BACKGROUND: The primary aim was to quantify the 30-day, 90-day, and 1-year mortality rates after primary shoulder replacement. The secondary aims were to assess the association between mortality and diagnoses and to compare the mortality rate with that of the general population. METHODS: The stud...

  13. Reverse Shoulder Arthroplasty

    Medline Plus

    Full Text Available Reverse Shoulder Arthroplasty Zimmer, Inc. New York City, New York March 17, 2010 Welcome to this OR Live presentation, brought to you by Zimmer. Hi. I'm ... my partner, Brad Parsons. We're here in New York to bring you a video of a ...

  14. Reverse Shoulder Arthroplasty

    Medline Plus

    Full Text Available ... a good result, but you also run the risk of getting a very stiff, or a flail shoulder that can't be lifted, although the re-operation rate is low. What's come out the studies by ...

  15. Adhesive Capsulitis (Frozen Shoulder)

    Science.gov (United States)

    ... Reaching: Put things you use every day (shoes, coffee cup, toothbrush) on a high shelf. This way you have to reach up for things more often. The reaching is a good stretch for your shoulder. Do the exercises once or twice a day even after your ...

  16. REPETITIVE PERIPHERAL MAGNETIC STIMULATION (15 HZ RPMS OF THE HUMAN SOLEUS MUSCLE DID NOT AFFECT SPINAL EXCITABILITY

    Directory of Open Access Journals (Sweden)

    Martin Behrens

    2011-03-01

    Full Text Available The electric field induced by repetitive peripheral magnetic stimulation (RPMS is able to activate muscles artificially due to the stimulation of deep intramuscular motor axons. RPMS applied to the muscle induces proprioceptive input to the central nervous system in different ways. Firstly, the indirect activation of mechanoreceptors and secondly, direct activation of afferent nerve fibers. The purpose of the study was to examine the effects of RPMS applied to the soleus. Thirteen male subjects received RPMS once and were investigated before and after the treatment regarding the parameters maximal M wave (Mmax, maximal H-reflex (Hmax, Hmax/Mmax-ratio, Hmax and Mmax onset latencies and plantar flexor peak twitch torque associated with Hmax (PTH. Eleven male subjects served as controls. No significant changes were observed for Hmax and PTH of the treatment group but the Hmax/Mmax-ratio increased significantly (p = 0.015 on account of a significantly decreased Mmax (p = 0.027. Hmax onset latencies were increased for the treatment group (p = 0.003 as well as for the control group (p = 0.011 while Mmax onset latencies did not change. It is concluded that the RPMS protocol did not affect spinal excitability but acted on the muscle fibres which are part of fast twitch units and mainly responsible for the generation of the maximal M wave. RPMS probably modified the integrity of neuromuscular propagation.

  17. Changes in extracellular muscle volume affect heart rate and blood pressure responses to static exercise

    Science.gov (United States)

    Baum, K.; Essfeld, D.; Stegemann, J.

    To investigate the effect of μg-induced peripheral extracellular fluid reductions on heart rate and blood pressure during isometric exercise, six healthy male subjects performed three calf ergometer test with different extracellular volumes of working muscles. In all tests, body positions during exercise were identical (supine with the knee joint flexed to 900). After a pre-exercise period of 25 min, during which calf volumes were manipulated, subjects had to counteract an external force of 180 N for 5 min. During the pre-exercise period three different protocols were applied. Test A: Subjects rested in the exercise position; test B: Body position was the same as in A but calf volume was increased by venous congestion (cuffs inflated to 80 mm Hg); test C: Calf volumes were decreased by a negative hydrostatic pressure (calves about 40 cm above heart level with the subjects supine). To clamp the changed calf volumes in tests B and C, cuffs were inflated to 300 mm Hg 5 min before the onset of exercise. This occlusion was maintained until termination of exercise. Compared to tests A and B, the reduced volume of test C led to significant increases in heart rate and blood pressure during exercise. Oxygen uptake did not exceed resting levels in B and C until cuffs were deflated, indicating that exclusively calf muscles contributed to the neurogenic peripheral drive. It is concluded that changes in extracellular muscle volume have to be taken into account when comparing heart rate and blood pressure during lg- and μg- exercise.

  18. ANGIOTENSIN-CONVERTING ENZYME GENOTYPE AFFECTS SKELETAL MUSCLE STRENGTH IN ELITE ATHLETES

    Directory of Open Access Journals (Sweden)

    Aldo Matos Costa

    2009-09-01

    Full Text Available Previous studies have associated angiotensin-converting enzyme (ACE D allele with variability in the skeletal muscle baseline strength, though conclusions have been inconsistent across investigations. The purpose of this study was to examine the possible association between ACE genotype and skeletal muscle baseline strength in elite male and female athletes involved in different event expertise. A group of 58 elite athletes, designated as Olympic candidates, were studied: 35 swimmers (19 males and 16 females, 18.8 ± 3.2 years and 23 triathletes (15 males and 8 females, 18.7 ± 3.0 years. The athletes were classified as: short (< 200m and middle (400m to 1500m distance athletes, respectively. For each subject the grip strength in both hands was measure using an adjustable mechanical hand dynamometer. The maximum height in both squat jump (SJ and counter movement jump (CMJ were also assessed, using a trigonometric carpet (Ergojump Digitime 1000; Digitest, Jyvaskyla, Finland. DNA extraction was obtained with Chelex 100® and genotype determination by PCR-RFLP methods. Both males and females showed significantly higher right grip strength in D allele carriers compared to II homozygote's. We found that allelic frequency differs significantly by event distance specialization in both genders (p < 0.05. In fact, sprinter D allele carriers showed the superior scores in nearly all strength measurements (p < 0.05, in both genders. Among endurance athletes, the results also demonstrated that female D allele carriers exhibited the higher performance right grip and CMJ scores (p < 0.05. In conclusion, the ACE D allele seems associated with skeletal muscle baseline strength in elite athletes, being easily identified in females

  19. Type of Ground Surface during Plyometric Training Affects the Severity of Exercise-Induced Muscle Damage

    OpenAIRE

    Hamid Arazi; Roger Eston; Abbas Asadi; Behnam Roozbeh; Alireza Saati Zarei

    2016-01-01

    The purpose of this study was to compare the changes in the symptoms of exercise-induced muscle damage from a bout of plyometric exercise (PE; 10 × 10 vertical jumps) performed in aquatic, sand and firm conditions. Twenty-four healthy college-aged men were randomly assigned to one of three groups: Aquatic (AG, n = 8), Sand (SG, n = 8) and Firm (FG, n = 8). The AG performed PE in an aquatic setting with a depth of ~130 cm. The SG performed PE on a dry sand surface at a depth of 20 cm, and the ...

  20. Iduronic Acid in chondroitin/dermatan sulfate affects directional migration of aortic smooth muscle cells

    OpenAIRE

    B. Bartolini; Thelin, M.A.; Svensson, L; Ghiselli, G.; Kuppevelt, T.H. van; Malmstrom, A.; Maccarana, M.

    2013-01-01

    Aortic smooth muscle cells produce chondroitin/dermatan sulfate (CS/DS) proteoglycans that regulate extracellular matrix organization and cell behavior in normal and pathological conditions. A unique feature of CS/DS proteoglycans is the presence of iduronic acid (IdoA), catalyzed by two DS epimerases. Functional ablation of DS-epi1, the main epimerase in these cells, resulted in a major reduction of IdoA both on cell surface and in secreted CS/DS proteoglycans. Downregulation of IdoA led to ...

  1. Reverse Shoulder Arthroplasty

    Medline Plus

    Full Text Available ... don't cut into the hamburger of the muscle, but have that nice, thick periosteal flap. And, ... try to repair, as that's the important workhorse muscle for this implant. And so, that's my routine. ...

  2. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... ll externally rotate it to bring the subscap muscle fibers out to see us. Let me see ... there's still a little bit of the subscap muscle fibers on it I can see right here, ...

  3. Rapid increases in training load affects markers of skeletal muscle damage and mechanical performance

    DEFF Research Database (Denmark)

    Kamandulis, Sigitas; Snieckus, Audrius; Venckunas, Tomas; Aagaard, Per; Masiulis, Nerijus; Skurvydas, Albertas

    2012-01-01

    The aim of the present study was to monitor the changes in indirect markers of muscle damage during 3 weeks (nine training sessions) of stretch-shortening (drop jump) exercise with constant load alternated with steep increases in load. Physically active men (n = 9, mean age 19.1 years) performed a...... program involving a rapid stepwise increase in the number of jumps, drop height, and squat depth, and the addition of weight. Concentric, isometric maximal voluntary contraction (MVC), and stimulated knee extension torque were measured before and 10 min after each session. Muscle soreness and plasma....... Maximal jump height increased by 7.8% ± 6.3% (P <0.05), 11.4% ± 3.3% (P <0.05), and 12.8% ± 3.6% (P <0.05) at 3, 10, and 17 days following the final training session, respectively. Gains in isometric knee extension MVC (7.9% ± 8.2%) and 100-Hz-evoked torque (9.9% ± 9.6%) (both P <0.05) were observed...

  4. Evaluation of 67Ga accumulation around the shoulder joint

    International Nuclear Information System (INIS)

    67Ga scintigraphy was performed in 865 patients, and in 1078 examinations. 67Ga accumulation was evaluated retrospectively for asymmetric accumulation in the shoulders. Approximately 50% of patients showed no asymmetric distribution of 67Ga in the shoulders. About 40% of patients showed increased accumulation in the right side and about 10% of patients showed increased accumulation in the left side. A change of 67Ga distribution in the shoulder joints was recognized in about 30% of patients during the follow-up study. Reasons for asymmetric distribution of 67Ga in the shoulders were considered to be due to bone metastasis, changes of local blood flow, edema, irradiation, muscle atrophy after cerebral paralysis, and operation. 67Ga scintigraphy showed a broader range and more prominent accumulation in the soft tissues around the shoulder joint than 99mTc-MDP scintigraphy. The accumulation of 99mTc-MDP was recognized to be in the center of the region of 67Ga accumulation. 99mTc-MDP scintigraphy showed more prominently increased accumulation than 67Ga scintigraphy in patients with osseous lesions. Similar factors appeared to have had an influence on the abnormal accumulation of 67Ga and 99mTc-MDP around the shoulder joint. (author)

  5. Does surgery followed by physiotherapy improve short and long term outcome for patients with atraumatic shoulder instability compared with physiotherapy alone? - protocol for a randomized controlled clinical trial

    OpenAIRE

    Jaggi, Anju; Alexander, Susan; Herbert, Robert; Funk, Lennard; Ginn, Karen A

    2014-01-01

    Background Shoulder instability is a common problem affecting young adults. Stabilization surgery followed by physiotherapy rehabilitation has been shown to reduce the chance of further episodes of shoulder dislocation and to improve quality of life in patients who sustain a shoulder dislocation as a result of a high collision trauma, but it is unclear if surgical intervention is beneficial for patients with atraumatic shoulder instability who have structural damage at the shoulder. The aim o...

  6. Metastatic gastric cancer presenting with shoulder-hand syndrome: a case report

    OpenAIRE

    Massarotti Marco; Ciocia Gianluigi; Ceriani Roberto; Chiti Arturo; Marasini Bianca

    2008-01-01

    Abstract Introduction Shoulder-hand syndrome is a relatively rare clinical entity classified as a complex regional pain syndrome type 1 and consisting essentially of a painful 'frozen shoulder' with disability, swelling, vasomotor or dystrophic changes in the homolateral hand. The pathophysiology is not completely clear but a predominant 'sympathetic' factor affecting the neural and vascular supply to the affected parts seems to be involved. Shoulder-hand syndrome has been related to many sur...

  7. One-year high fat diet affects muscle-but not brain mitochondria

    DEFF Research Database (Denmark)

    Joergensen, Tenna; Grunnet, Niels; Quistorff, Bjørn

    2015-01-01

    It is well known that few weeks of high fat (HF) diet may induce metabolic disturbances and mitochondrial dysfunction in skeletalmuscle. However, little is known about the effects of long-term HF exposure and effects on brain mitochondria are unknown. Wistarrats were fed either chow (13E% fat) or...... HF diet (60E% fat) for 1 year. The HF animals developed obesity, dyslipidemia, insulinresistance, and dysfunction of isolated skeletal muscle mitochondria: state 3 and state 4 were 30% to 50% increased (P < 0.058)with palmitoyl carnitine (PC), while there was no effect with pyruvate as substrate....... Adding also succinate in state 3 resulted in ahigher substrate control ratio (SCR) with PC, but a lower SCR with pyruvate (P < 0.05). The P/O2 ratio was lower with PC (P < 0.004).However, similar tests on isolated brain mitochondria from the same animal showed no changes with the substrates relevant...

  8. Work related shoulder disorders

    DEFF Research Database (Denmark)

    Svendsen, Susanne Wulff; Bonde, Jens Peter; Mathiassen, S.E.;

    2004-01-01

    Aims: To determine quantitative exposure-response relations between work with highly elevated arms and supraspinatus tendinitis, shoulder pain with disability, and shoulder pain without disability. Methods: A cross sectional study was conducted in a historical cohort of 1886 males from three...... occupational groups. Exposure measurements were performed for four consecutive working days in a random sample of 72 currently employed subjects. Individual work histories were obtained by questionnaire and register data. Health status was ascertained by physical examination blinded towards exposure...... and symptoms. Data were analysed by generalised estimating equation and multiple logistic regression with adjustment for potential confounders. Results: For current upper arm elevation above 90°, a duration increment of 1% of the daily working hours was associated with odds ratios of 1.23 (95% CI 1.10 to 1...

  9. Kinesio taping effect on biceps brachii muscle strength

    OpenAIRE

    Králová Dagmar; Novotný Jan; Řezaninová Jana

    2013-01-01

    This work aimed at presenting the idea of inventor Dr. Kenzo Kase that kinesio tape application with proximal base leads to muscle contraction facilitation and application with distal base leads to muscle contraction inhibition. Twenty male volleyball players with the dominant shoulder girdle muscle imbalance between the ages of 25 and 30 participated in this study. There were compared two techniques which were placed on biceps brachii muscle in shoulder and elbow joint extension. Isokinetic ...

  10. Different Levels of Eccentric Resistance during Eight Weeks of Training Affect Muscle Strength and Lean Tissue Mass

    Science.gov (United States)

    English, K. L.; Loehr, J. A.; Lee, S. M. C.; Laughlin, M. S.; Hagan, R. D.

    2008-01-01

    .3%) groups. All groups significantly increased HR strength pre- to posttraining (33%: 7.5 +/- 6.1%; 66%: 6.6 +/- 3.7%; 100%: 12.2 +/- 1.8%; 138%: 11.0 +/- 6.4%) except for the 0% (4.9 +/- 9.1%) group. There were no differences between groups. LLM increased significantly pre- to post-training in only the 138% group; there were no differences between groups. CONCLUSIONS: Eight wks of lower body resistive exercise training with eccentric overload resulted in greater increases in LP strength than training with eccentric loads of 66% or less. Post-training HR strength was not affected by eccentric training load, perhaps because of the predominance of Type I fibers typical in the gastrocnemius. Only 138% eccentric training significantly increased LLM. PRACTICAL APPLICATIONS: For athletes or others desiring to maximize muscle strength and hypertrophy gains, training with eccentric loads greater than 100% of concentric resistance will provide greater increases in muscle strength and lean tissue mass in some muscle groups. In a rehabilitation or geriatric exercise setting that places primary emphasis on program adherence and moderate strength gains, training with an eccentric underload may provide strength increases comparable to those of traditional 1:1 training but with less muscle soreness and physiologic insult to the patient, but this has yet to be proven.

  11. Identification of common regulators of genes in co-expression networks affecting muscle and meat properties.

    Directory of Open Access Journals (Sweden)

    Siriluck Ponsuksili

    Full Text Available Understanding the genetic contributions behind skeletal muscle composition and metabolism is of great interest in medicine and agriculture. Attempts to dissect these complex traits combine genome-wide genotyping, expression data analyses and network analyses. Weighted gene co-expression network analysis (WGCNA groups genes into modules based on patterns of co-expression, which can be linked to phenotypes by correlation analysis of trait values and the module eigengenes, i.e. the first principal component of a given module. Network hub genes and regulators of the genes in the modules are likely to play an important role in the emergence of respective traits. In order to detect common regulators of genes in modules showing association with meat quality traits, we identified eQTL for each of these genes, including the highly connected hub genes. Additionally, the module eigengene values were used for association analyses in order to derive a joint eQTL for the respective module. Thereby major sites of orchestrated regulation of genes within trait-associated modules were detected as hotspots of eQTL of many genes of a module and of its eigengene. These sites harbor likely common regulators of genes in the modules. We exemplarily showed the consistent impact of candidate common regulators on the expression of members of respective modules by RNAi knockdown experiments. In fact, Cxcr7 was identified and validated as a regulator of genes in a module, which is involved in the function of defense response in muscle cells. Zfp36l2 was confirmed as a regulator of genes of a module related to cell death or apoptosis pathways. The integration of eQTL in module networks enabled to interpret the differentially-regulated genes from a systems perspective. By integrating genome-wide genomic and transcriptomic data, employing co-expression and eQTL analyses, the study revealed likely regulators that are involved in the fine-tuning and synchronization of genes with

  12. Identification of common regulators of genes in co-expression networks affecting muscle and meat properties.

    Science.gov (United States)

    Ponsuksili, Siriluck; Siengdee, Puntita; Du, Yang; Trakooljul, Nares; Murani, Eduard; Schwerin, Manfred; Wimmers, Klaus

    2015-01-01

    Understanding the genetic contributions behind skeletal muscle composition and metabolism is of great interest in medicine and agriculture. Attempts to dissect these complex traits combine genome-wide genotyping, expression data analyses and network analyses. Weighted gene co-expression network analysis (WGCNA) groups genes into modules based on patterns of co-expression, which can be linked to phenotypes by correlation analysis of trait values and the module eigengenes, i.e. the first principal component of a given module. Network hub genes and regulators of the genes in the modules are likely to play an important role in the emergence of respective traits. In order to detect common regulators of genes in modules showing association with meat quality traits, we identified eQTL for each of these genes, including the highly connected hub genes. Additionally, the module eigengene values were used for association analyses in order to derive a joint eQTL for the respective module. Thereby major sites of orchestrated regulation of genes within trait-associated modules were detected as hotspots of eQTL of many genes of a module and of its eigengene. These sites harbor likely common regulators of genes in the modules. We exemplarily showed the consistent impact of candidate common regulators on the expression of members of respective modules by RNAi knockdown experiments. In fact, Cxcr7 was identified and validated as a regulator of genes in a module, which is involved in the function of defense response in muscle cells. Zfp36l2 was confirmed as a regulator of genes of a module related to cell death or apoptosis pathways. The integration of eQTL in module networks enabled to interpret the differentially-regulated genes from a systems perspective. By integrating genome-wide genomic and transcriptomic data, employing co-expression and eQTL analyses, the study revealed likely regulators that are involved in the fine-tuning and synchronization of genes with trait

  13. Acupuncture Treatment of Shoulder Pain

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    @@ Case History Mr. Wen Senting, an Italian of 41 years old, paid his first visit on Mar. 17, 2004, with a chief complaint of the left shoulder pain for over a year. The patient stated that the pain resulted from an injury in his left shoulder one year before while playing the tennis. It was then diagnosed as soft tissue injury of the shoulder. The pain had been alleviated by massage treatment, but it would appear upon tiredness or exposure to cold, and had gradually impaired the shoulder movement. In recent half a year, the pain had gone worse, with obvious motor impairment.

  14. In ovo L-arginine supplementation stimulates myoblast differentiation but negatively affects muscle development of broiler chicken after hatching.

    Science.gov (United States)

    Li, Y; Wang, Y; Willems, E; Willemsen, H; Franssens, L; Buyse, J; Decuypere, E; Everaert, N

    2016-02-01

    In this study, we tested the hypothesis that in ovo feeding (IOF) of L-arginine (L-Arg) enhances nitric oxide (NO) production, stimulates the process of myogenesis, and regulates post-hatching muscle growth. Different doses of L-Arg were injected into the amnion of chicken embryos at embryonic day (ED) 16. After hatching, the body weight of individual male chickens was recorded weekly for 3 weeks. During in vitro experiments, myoblasts of the pectoralis major (PM) were extracted at ED16 and were incubated in medium containing 0.01 mm L-Arg, 0.05 mm L-Arg, and (or) 0.05 mm L-nitro-arginine-methyl-ester (L-NAME), an inhibitor of nitric oxide synthase (NOS). When 25 mg/kg L-Arg/initial egg weight was injected, no difference was observed in body weight at hatch, but a significant decrease was found during the following 3 weeks compared to that of the non-injected and saline-injected control, and this also affected the growth of muscle mass. L-NAME inhibited gene expression of myogenic differentiation antigen (MyoD), myogenin, NOS, and follistatin, decreased the cell viability, and increased myostatin (MSTN) gene expression. 0.05 mm L-Arg stimulated myogenin gene expression but also depressed muscle cell viability. L-NAME blocked the effect of 0.05 mm L-Arg on myogenin mRNA levels when co-incubated with 0.05 mm L-Arg. L-Arg treatments had no significant influence on NOS mRNA gene expression, but had inhibiting effect on follistatin gene expression, while L-NAME treatments had effects on both. These results suggested that L-Arg stimulated myoblast differentiation, but the limited number of myoblasts would form less myotubes and then less myofibers, while the latter limited the growth of muscle mass. PMID:25846259

  15. Treatment of myofascial trigger points in patients with chronic shoulder pain: a randomized, controlled trial

    Directory of Open Access Journals (Sweden)

    Stegenga Boudewijn

    2011-01-01

    Full Text Available Abstract Background Shoulder pain is a common musculoskeletal problem that is often chronic or recurrent. Myofascial trigger points (MTrPs cause shoulder pain and are prevalent in patients with shoulder pain. However, few studies have focused on MTrP therapy. The aim of this study was to assess the effectiveness of multimodal treatment of MTrPs in patients with chronic shoulder pain. Methods A single-assessor, blinded, randomized, controlled trial was conducted. The intervention group received comprehensive treatment once weekly consisting of manual compression of the MTrPs, manual stretching of the muscles and intermittent cold application with stretching. Patients were instructed to perform muscle-stretching and relaxation exercises at home and received ergonomic recommendations and advice to assume and maintain good posture. The control group remained on the waiting list for 3 months. The Disabilities of Arm, Shoulder and Hand (DASH questionnaire score (primary outcome, Visual Analogue Scale for Pain (VAS-P, Global Perceived Effect (GPE scale and the number of muscles with MTrPs were assessed at 6 and 12 weeks in the intervention group and compared with those of a control group. Results Compared with the control group, the intervention group showed significant improvement (P Conclusions The results of this study show that 12-week comprehensive treatment of MTrPs in shoulder muscles reduces the number of muscles with active MTrPs and is effective in reducing symptoms and improving shoulder function in patients with chronic shoulder pain. Trial registration number ISRCTN: ISRCTN75722066

  16. On the Design of a CADS for Shoulder Pain Pathology

    Science.gov (United States)

    de Ipiña, K. López; Hernández, M. C.; Martínez, E.; Vaquero, C.

    A musculoskeletal disorder is a condition of the musculoskeletal system, which consists in part of it being injured continuously over time. Shoulder disorders are one of the most common musculoskeletal cases attended in primary health care services. Shoulder disorders cause pain and limit the ability to perform many routine activities, affecting about 15-25 % of the general population. Several clinical tests have been described to aid diagnosis of shoulder disorders. However, the current literature acknowledges a lack of concordance in clinical assessment, even among musculoskeletal specialists. We are working on the design of a Computer-Aided Decision Support (CADS) system for Shoulder Pain Pathology. The paper presents the results of our efforts to build a CADS system testing several classical classification paradigms, feature reduction methods (PCA) and K-means unsupervised clustering. The small database size imposes the use of robust covariance matrix estimation methods to improve the system performance. Finally, the system was evaluated by a medical specialist.

  17. Comparative cardiac pathological changes of Atlantic salmon (Salmo salar L.) affected with heart and skeletal muscle inflammation (HSMI), cardiomyopathy syndrome (CMS) and pancreas disease (PD)

    DEFF Research Database (Denmark)

    Yousaf, Muhammad Naveed; Koppang, Erling Olaf; Skjødt, Karsten;

    2013-01-01

    The heart is considered the powerhouse of the cardiovascular system. Heart and skeletal muscle inflammation (HSMI), cardiomyopathy syndrome (CMS) and pancreas disease (PD) are cardiac diseases of marine farmed Atlantic salmon (Salmo salar) which commonly affect the heart in addition to the skeletal...... muscle, liver and pancreas. The main findings of these diseases are necrosis and inflammatory cells infiltrates affecting different regions of the heart. In order to better characterize the cardiac pathology, study of the inflammatory cell characteristics and cell cycle protein expression was undertaken...

  18. Isobaric Tagging-Based Quantification for Proteomic Analysis: A Comparative Study of Spared and Affected Muscles from mdx Mice at the Early Phase of Dystrophy.

    Directory of Open Access Journals (Sweden)

    Cintia Yuri Matsumura

    Full Text Available Duchenne muscular dystrophy (DMD is the most common childhood myopathy, characterized by muscle loss and cardiorespiratory failure. While the genetic basis of DMD is well established, secondary mechanisms associated with dystrophic pathophysiology are not fully clarified yet. In order to obtain new insights into the molecular mechanisms of muscle dystrophy during earlier stages of the disease, we performed a comparative proteomic profile of the spared extraocular muscles (EOM vs. affected diaphragm from the mdx mice, using a label based shotgun proteomic approach. Out of the 857 identified proteins, 42 to 62 proteins had differential abundance of peptide ions. The calcium-handling proteins sarcalumenin and calsequestrin-1 were increased in control EOM compared with control DIA, reinforcing the view that constitutional properties of EOM are important for their protection against myonecrosis. The finding that galectin-1 (muscle regeneration, annexin A1 (anti-inflammatory and HSP 47 (fibrosis were increased in dystrophic diaphragm provides novel insights into the mechanisms through which mdx affected muscles are able to counteract dystrophy, during the early stage of the disease. Overall, the shotgun technique proved to be suitable to perform quantitative comparisons between distinct dystrophic muscles and allowed the suggestion of new potential biomarkers and drug targets for dystrophinopaties.

  19. Give Someone the Cold Shoulder

    Institute of Scientific and Technical Information of China (English)

    程炜

    2002-01-01

    The snowman in this illustration is happy to allow a bird to rest on its cold shoulder.., but that's not what this idiom means.To give someone the cold shoulder is to be un-friendly, usually by ignoring them.

  20. Impact of shoulder complaints after neck dissection on shoulder disability and quality of life

    OpenAIRE

    Stuiver, Martijn M.; van Wilgen, Cornelis P.; de Boer, Erlijn M.; de Goede, Cees J. T.; Koolstra, Muriel; van Opzeeland, Anita; Venema, Piet; Sterken, Margriet W.; Vincent, Andrew; Dijkstra, Pieter U.

    2008-01-01

    OBJECTIVE: To explore relationships between shoulder complaints after neck dissection, shoulder disability, and quality of life. To find clinical predictors for mid- to long-term shoulder disability. STUDY DESIGN: Prospective. PATIENTS AND METHODS: Shoulder pain, shoulder mobility, and shoulder droop, as well as scores on shoulder disability questionnaire and RAND-36 (quality of life), were measured at baseline, discharge (T1), and 4 months postoperatively (T2) on 139 patients admitted for ne...

  1. Muscle Loss in Elderly

    OpenAIRE

    Nikolić, Marina; Šoić Vranić, Tamara; Arbanas, Juraj; Cvijanović, Olga; Bajek, Snježana

    2010-01-01

    Aging is associated with loss of skeletal muscle mass, strength and endurance. The aim of this study was to determinate age related changes in human muscles with different function and location in the body (vastus lateralis muscle and intercostal internus muscle). Our results suggest that age related muscle atrophy affect both human skeletal muscles. Also, the results showed the increase in percentage of muscle fibers with high oxidative activity during aging.

  2. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... can't do this operation without a Cobb elevator. That gives our flex-- that gives us nice ... going to go through those muscle fibers. Cobb elevator, large. So now we're going to peel ...

  3. Denervation syndromes of the shoulder girdle: MR imaging with electrophysiologic correlation

    International Nuclear Information System (INIS)

    Objective. To investigate the use of MR imaging in the characterization of denervated muscle of the shoulder correlated with electrophysiologic studies.Design and patients. We studied with MR imaging five patients who presented with shoulder weakness and pain and who underwent electrophysiologic studies. On MR imaging the distribution of muscle edema and fatty infiltration was recorded, as was the presence of masses impinging on a regional nerve.Results. Acute/subacute denervation was best seen on T2-weighted fast spin-echo images with fat saturation, showing increased SI related to neurogenic edema. Chronic denervation was best seen on T1-weighted spin-echo images, demonstrating loss of muscle bulk and diffuse areas of increased signal intensity within the muscle. Three patients showed MR imaging and electrophysiologic findings of Parsonage Turner syndrome. One patient demonstrated an arteriovenous malformation within the spinoglenoid notch, impinging on the suprascapular nerve with associated atrophy of the infraspinatus muscle. The fifth patient demonstrated fatty atrophy of the teres minor muscle caused by compression by a cyst of the axillary nerve and electrophysiologic findings of an incomplete axillary nerve block.Conclusion. MR imaging is useful in detecting and characterizing denervation atrophy and neurogenic edema in shoulder muscles. MR imaging can provide additional information to electrophysiologic studies by estimating the age (acute/chronic) and identifying morphologic causes for shoulder pain and atrophy. (orig.)

  4. Radiological Projection for Diagnosis of Shoulder Subluxation in Patients with Post-Stroke Hemiplegia

    International Nuclear Information System (INIS)

    The purpose of this study was to find out useful radiological projection of shoulder subluxation in patients with post-stroke hemiplegia. A total of 33 patients with post-stroke hemiplegia were included(20 men and 13 women, mean age 62.3 years) and having the subluxed shoulder over one finger breath. The shoulder subluxation was determined as the ratio of the radiographic vertical and horizontal distance. The vertical distance was determined by measuring the distance between the most inferolateral point of the acromion and the central point of the humeral head. The horizontal distance was determined by measuring the distance between the central point of the glenoid fossa and the central point of the humeral head. To measure of the shoulder subluxation, the shoulder AP, axial and transthoracic lateral projections were taken on both affected and unaffected shoulders. We analyzed the difference of subluxation distance by t-test. When patients was in sitting position, the average time of being shoulder subluxation was 123 second. There was significant difference between supine(49.90±13.6 mm) and sitting position(60.72±16.3 mm) in the vertical distance of shoulder anterior-posterior projection. Also, there was significant difference on transthoracic lateral projections, Affected 35.92±6.2 mm, Unaffected 28.76±5.4 mm. But in case of shoulder axial projection(supine position), there was no significant difference (Unaffected and affected was 23.01±9.0 mm, 22.45±8.2 mm each). Radiological projection of shoulder subluxation has diagnostic value when it goes after check out the process of subluxation through finger breadth test. For this, patients must be in sitting and shoulder neutral position about 2 minutes. In addition, Shoulder anterior-posterior and transthoracic projection were significant to diagnose subluxation. But in axial projection, there wasn't meaningful differences.

  5. Muscle activation during selected strength exercises in women with chronic neck muscle pain

    DEFF Research Database (Denmark)

    Andersen, Lars L; Kjaer, Michael; Andersen, Christoffer H;

    2008-01-01

    BACKGROUND AND PURPOSE: Muscle-specific strength training has previously been shown to be effective in the rehabilitation of chronic neck muscle pain in women. The aim of this study was to determine the level of activation of the neck and shoulder muscles using surface electromyography (EMG) duri...

  6. Muscle activation during selected strength exercises in women with chronic neck muscle pain

    DEFF Research Database (Denmark)

    Andersen, L.L.; Kjaer, M.; Andersen, C.H.;

    2008-01-01

    Background and Purpose. Muscle-specific strength training has previously been shown to be effective in the rehabilitation of chronic neck muscle pain in women. The aim of this stud), was to determine the level of activation of the neck and shoulder muscles using surface electromyography (EMG) (lu...

  7. MRI of the shoulder joint with surface coils at 1.5 Tesla

    International Nuclear Information System (INIS)

    High spatial resolution magnetic resonance images of the shoulder were obtained in axial, sagittal and coronal orientations using a 1.5 T imaging system and anatomically shaped, wrap-around surface coils. Variations in scapular position induced by patient positioning change the relationship of the planes to the shoulder anatomy and make reproducibility of sagittal and coronal planes difficult. We, therefore, use - after axial orientation - image-oblique planes perpendicular and parallel to the glenoid fossa. In this manner MRI can visualise the anatomic structures of the shoulder including rotator cuff, long biceps tendon, articular capsule, articular cartilage, muscles and bones due to the high soft tissue contrast of MRI. (orig.)

  8. Short-term effects of implemented high intensity shoulder elevation during computer work

    DEFF Research Database (Denmark)

    Larsen, Mette K.; Samani, Afshin; Madeleine, Pascal;

    2009-01-01

    contractions during the computer work. However, it is unknown how this may influence productivity, rate of perceived exertion (RPE) as well as activity and rest of neck-shoulder muscles during computer work. The aim of this study was to investigate short-term effects of a high intensity contraction on......BACKGROUND: Work-site strength training sessions are shown effective to prevent and reduce neck-shoulder pain in computer workers, but difficult to integrate in normal working routines. A solution for avoiding neck-shoulder pain during computer work may be to implement high intensity voluntary...

  9. Muscular and glenohumeral changes in the shoulder after brachial plexus birth palsy: an MRI study in a rat model

    Directory of Open Access Journals (Sweden)

    Soldado Francisco

    2012-12-01

    Full Text Available Abstract Background Shoulder abnormalities are the major cause of morbidity in upper brachial plexus birth palsy (BPBP. We developed a rat model of upper trunk BPBP and compared our findings to previously reported animal models and to clinical findings in humans. Methods Forty-three 5-day-old newborn rats underwent selective upper trunk neurectomy of the right brachial plexus and were studied 3 to 20 weeks after surgery. The passive shoulder external rotation was measured and the shoulder joint was assessed bilaterally by a 7.2T MRI bilaterally. Results We found a marked decrease in passive shoulder external rotation, associated with a severe subscapularis muscle atrophy and contracture. None however developed the typical pattern of glenohumeral dysplasia. Conclusions In contradiction with previous reports, our study shows that the rat model is not adequate for preclinical studies of shoulder dysplasia. However, it might serve as a useful model for studies analyzing shoulder contracture occurring after upper BPBP.

  10. Complications of calcific tendinitis of the shoulder: a concise review

    OpenAIRE

    Merolla, Giovanni; Bhat, Mahendar G.; Paladini, Paolo; Porcellini, Giuseppe

    2015-01-01

    Abstract Calcific tendinitis (CT) of the rotator cuff (RC) muscles in the shoulder is a disorder which remains asymptomatic in a majority of patients. Once manifested, it can present in different ways which can have negative effects both socially and professionally for the patient. The treatment modalities can be either conservative or surgical. There is poor literature evidence on the complications of this condition with little consensus on the treatment of choice. In this review, the litera...

  11. Atrogin-1 Affects Muscle Protein Synthesis and Degradation When Energy Metabolism Is Impaired by the Antidiabetes Drug Berberine

    OpenAIRE

    Wang, Huiling; Liu, Dajun; Cao, Peirang; Lecker, Stewart; Hu, Zhaoyong

    2010-01-01

    OBJECTIVE Defects in insulin/IGF-1 signaling stimulate muscle protein loss by suppressing protein synthesis and increasing protein degradation. Since an herbal compound, berberine, lowers blood levels of glucose and lipids, we proposed that it would improve insulin/IGF-1 signaling, blocking muscle protein losses. RESEARCH DESIGN AND METHODS We evaluated whether berberine ameliorates muscle atrophy in db/db mice, a model of type 2 diabetes, by measuring protein synthesis and degradation in mus...

  12. Double oblique MR images of the shoulder. Comparison with conventional images

    International Nuclear Information System (INIS)

    Because the scapula is not only slanted on transverse sections but also inclines on sagittal sections, we now perform shoulder MR imaging using double oblique images (DOI), which are planes perpendicular or parallel to the long axis of the scapula obtained with oblique sagittal scout imaging. The purpose of this study was to evaluate the usefulness of double oblique shoulder MR imaging. MR images of shoulders with operatively or arthroscopically proven lesions (20 cases) that had been examined on both conventional images (CI) and DOI were retrospectively reviewed. DOI were compared with CI not only in terms of diagnostic performance but also in their ability to identify the details of shoulder anatomy. All MR studies were done with a shoulder coil on a high-field (1.5 T) unit. Although the accuracy of DOI in diagnosing shoulder disorders such as rotator cuff tear and labrum injury was not as good as that of CI, DOI were better for identifying or discriminating muscles and tendons of the rotator cuff, labralbicipital junction and anterior band of the inferior gleno-humeral ligament, and for recognizing the correct position of the glenoid labrum. MR double oblique imaging of the shoulder provides more detailed information about shoulder anatomy and disorders than conventional imaging. (author)

  13. MR imaging of the shoulder

    International Nuclear Information System (INIS)

    This paper evaluates the occurrence, frequency, and significance of increased signal intensity (SI) in the rotator cuff (RC) of normal volunteers suggestive of pathologic findings such as partial tears and tendinitis. Shoulders of 30 volunteers without evidence of prior shoulder disease or trauma were studied. MR imaging at 1.5 T included T1-weighted, proton-density, and T2-weighted spin-echo (SE) and T2*-weighted gradient-echo sequences in axial, oblique coronal, and sagittal planes. Shoulders of 30 cadavers were dissected and studied for correlation with MR findings, five of them after MR examination

  14. Ultrasonography of the painful shoulder

    International Nuclear Information System (INIS)

    A thorough knowledge of the normal anatomy was applied in the study of 132 patients with painful shoulder to establish the ultrasonographic findings that indicate the diagnosis of lesions of the rotator cuff of the shoulder (tendentious, tendons degeneration and the different types of fracture) as well as bursitis, lesions of the tendon of the long head of the biceps, joint effusions, lesions of the humeral head, etc. As an initial method of studying painful shoulder using standard plain radiography, this techniques is considered a reliable diagnostic procedure. (Author)

  15. Metastatic gastric cancer presenting with shoulder-hand syndrome: a case report

    Directory of Open Access Journals (Sweden)

    Massarotti Marco

    2008-07-01

    Full Text Available Abstract Introduction Shoulder-hand syndrome is a relatively rare clinical entity classified as a complex regional pain syndrome type 1 and consisting essentially of a painful 'frozen shoulder' with disability, swelling, vasomotor or dystrophic changes in the homolateral hand. The pathophysiology is not completely clear but a predominant 'sympathetic' factor affecting the neural and vascular supply to the affected parts seems to be involved. Shoulder-hand syndrome has been related to many surgical, orthopedic, neurological and medical conditions; it is more often seen after myocardial infarction, hemiplegia and painful conditions of neck and shoulder, such as trauma, tumors, cervical discogenic or intraforaminal diseases and shoulder calcific tendinopathy, but has also been associated with herpetic infections, brain and lung tumors, thoracoplasty and drugs including phenobarbitone and isoniazid. The diagnosis of shoulder-hand syndrome is primarily clinical, but imaging studies, particularly bone scintigraphy, may be useful to exclude other disorders. Case presentation We report the case of a 67-year-old woman who presented with shoulder-hand syndrome as the initial manifestation of gastric cancer which had metastasized to bone. Conclusion Wider investigations are advisable in patients with atypical shoulder-hand syndrome. To the best of the authors' knowledge this is the first case of shoulder-hand syndrome associated with metastatic gastric cancer.

  16. Shoulder impingement syndrome : evaluation of the causes with MRI

    Energy Technology Data Exchange (ETDEWEB)

    Choi, Yong Ho; Song, In Sup; Chung, Hun Young; Yoon, Sang Jin; Kim, Yang Soo; Shim, Hyung Jin; Choi, Young Hee; Lee, Jong Beum; Lee, Yong Chul; Kim, Kun Sang [Chungang Univ. College of Medicine, Seoul (Korea, Republic of); Choi, Yun Sun [Eulji Hospital, College of Medicine, Seoul (Korea, Republic of)

    1999-12-01

    Various mechanical causes which induce shoulder impingement syndrome have been identified with the help of MRI. The aim of this study is to evaluate the incidence of such causes. A total of 54 patients with clinically confirmed shoulder impingement syndrome and a normal control group(n=20) without symptoms were included. We evaluated the incidence of hook shaped acromion, low lying acromion, downward slope of the acromion, subacromial spur, acromioclavicular joint hypertrophy, coracoacromial ligament hypertrophy, high cuff muscle bulk, and os acromiale. Among the 54 patients, the following conditions were present: acromioclavicular joint hypertrophy(n=36), coracoacromial ligament hypertrophy(n=20), subacromial spur(n=18), downward sloping of the acromion(n=16), hook shaped acromion(n=11), relatively high cuff muscle bulk(n=6), low lying acromion relative to the clavicle(n=3), and os acromiale(n=1). In the normal control group there were nine cases of acromioclavicular joint hypertrophy, nine of coracoacromial ligament hypertrophy, nine of downward sloping acromion, and three of low lying acromion, but hook shaped acromion, high cuff muscle bulk, and os acromiale were not found. Among 54 patients, the syndrome was due to five simultancous causes in one patient, four causes in two, three causes in 12, two causes in 22, and one cause in 17. Hook shaped acromion and subacromial spur are the statistically significant causes of shoulder impingement syndrome. In 69% of patients, the condition was due to more than one cause.

  17. Shoulder impingement syndrome : evaluation of the causes with MRI

    International Nuclear Information System (INIS)

    Various mechanical causes which induce shoulder impingement syndrome have been identified with the help of MRI. The aim of this study is to evaluate the incidence of such causes. A total of 54 patients with clinically confirmed shoulder impingement syndrome and a normal control group(n=20) without symptoms were included. We evaluated the incidence of hook shaped acromion, low lying acromion, downward slope of the acromion, subacromial spur, acromioclavicular joint hypertrophy, coracoacromial ligament hypertrophy, high cuff muscle bulk, and os acromiale. Among the 54 patients, the following conditions were present: acromioclavicular joint hypertrophy(n=36), coracoacromial ligament hypertrophy(n=20), subacromial spur(n=18), downward sloping of the acromion(n=16), hook shaped acromion(n=11), relatively high cuff muscle bulk(n=6), low lying acromion relative to the clavicle(n=3), and os acromiale(n=1). In the normal control group there were nine cases of acromioclavicular joint hypertrophy, nine of coracoacromial ligament hypertrophy, nine of downward sloping acromion, and three of low lying acromion, but hook shaped acromion, high cuff muscle bulk, and os acromiale were not found. Among 54 patients, the syndrome was due to five simultancous causes in one patient, four causes in two, three causes in 12, two causes in 22, and one cause in 17. Hook shaped acromion and subacromial spur are the statistically significant causes of shoulder impingement syndrome. In 69% of patients, the condition was due to more than one cause

  18. Effect of shoulder taping on maximum shoulder external and internal rotation range in uninjured and previously injured overhead athletes during a seated throw.

    Science.gov (United States)

    McConnell, Jenny; Donnelly, Cyril; Hamner, Samuel; Dunne, James; Besier, Thor

    2011-09-01

    The purpose of our study was to investigate whether shoulder taping affects shoulder kinematics in injured and previously injured overhead athletes during a seated throw. Twenty-six overhead college athletes threw a handball three times with and without tape, while seated on a chair. An 8-camera Vicon Motion Capture system recorded markers placed on the upper limb and trunk during each of the throwing conditions. Scaled musculoskeletal models of the upper limb were created using OpenSim and inverse kinematics used to obtain relevant joint angles. Shoulder taping had no main effect on external (ER) and internal (IR) rotation range (ROM) of the shoulder, but a significant interaction effect was found (p = 0.003 and 0.02, respectively), depending on previous injury status, whereby both the ER and IR ROM of the shoulder in the group of previously injured athletes decreased when taped (143-138° and 54-51°, respectively), but increased in the group who had never been injured (131-135° and 42-44°, respectively). Maximum abduction range and ball velocity were not affected by the application of shoulder taping, regardless of previous injury status. Thus, application of shoulder taping has a differential effect on maximum shoulder ER and IR ROM during throwing depending on previous injury status. These findings have implications for returning athletes to sport after injury and for screening athletes at risk of injury. PMID:21437968

  19. FORWARD HEAD POSTURE CORRECTION VERSUS SHOULDER STABILIZATION EXERCISES EFFECT ON SCAPULAR DYSKINESIA AND SHOULDER PROPRIOCEPTION IN ATHLETES AN EXPERIMENTAL STUDY

    OpenAIRE

    Deepmala Thakur, Basavraj Motimath, Raghavendra M

    2016-01-01

    Background: Forward head posture (FHP), the most common deviation from the normal curvature in cervical spine. Craniocervical flexor muscle strengthening is frequently used treatment for FHP. Scapular dykinesia (SD) is the alteration in the normal static or dynamic motion of the scapula during coupled scapulohumeral movements. Shoulder stabilization exercises are an effective treatment for SD. As both FHP and SD are related to each other, the objective of the study was to find and compare the...

  20. Arginine Depletion by Arginine Deiminase Does Not Affect Whole Protein Metabolism or Muscle Fractional Protein Synthesis Rate in Mice

    Science.gov (United States)

    Marini, Juan C.; Didelija, Inka Cajo

    2015-01-01

    Due to the absolute need for arginine that certain cancer cells have, arginine depletion is a therapy in clinical trials to treat several types of cancers. Arginine is an amino acids utilized not only as a precursor for other important molecules, but also for protein synthesis. Because arginine depletion can potentially exacerbate the progressive loss of body weight, and especially lean body mass, in cancer patients we determined the effect of arginine depletion by pegylated arginine deiminase (ADI-PEG 20) on whole body protein synthesis and fractional protein synthesis rate in multiple tissues of mice. ADI-PEG 20 successfully depleted circulating arginine (<1 μmol/L), and increased citrulline concentration more than tenfold. Body weight and body composition, however, were not affected by ADI-PEG 20. Despite the depletion of arginine, whole body protein synthesis and breakdown were maintained in the ADI-PEG 20 treated mice. The fractional protein synthesis rate of muscle was also not affected by arginine depletion. Most tissues (liver, kidney, spleen, heart, lungs, stomach, small and large intestine, pancreas) were able to maintain their fractional protein synthesis rate; however, the fractional protein synthesis rate of brain, thymus and testicles was reduced due to the ADI-PEG 20 treatment. Furthermore, these results were confirmed by the incorporation of ureido [14C]citrulline, which indicate the local conversion into arginine, into protein. In conclusion, the intracellular recycling pathway of citrulline is able to provide enough arginine to maintain protein synthesis rate and prevent the loss of lean body mass and body weight. PMID:25775142

  1. A muscle stem cell for every muscle: variability of satellite cell biology among different muscle groups

    OpenAIRE

    Randolph, Matthew E.; Pavlath, Grace K.

    2015-01-01

    The human body contains approximately 640 individual skeletal muscles. Despite the fact that all of these muscles are composed of striated muscle tissue, the biology of these muscles and their associated muscle stem cell populations are quite diverse. Skeletal muscles are affected differentially by various muscular dystrophies (MDs), such that certain genetic mutations specifically alter muscle function in only a subset of muscles. Additionally, defective muscle stem cells have been implicate...

  2. Soft tissue balancing in total shoulder replacement

    OpenAIRE

    Mueller, Maike; Hoy, Gregory

    2014-01-01

    Total shoulder arthroplasty is now capable of recreating near anatomic reproduction of native bony shoulder anatomy, but the function and longevity of anatomic shoulder replacement is dependent on a competent soft tissue envelope and adequate motoring of all musculo-tendinous units about the shoulder. Balancing the soft tissues requires understanding of the anatomy and pathology, as well as technical skills. The advent of reverse shoulder biomechanics has brought with it special requirements ...

  3. Shoulder disorders in the elderly (a hospital study).

    OpenAIRE

    Chard, M D; Hazleman, B L

    1987-01-01

    One hundred acute geriatric inpatients were assessed to investigate the prevalence of shoulder disorders; 21 had symptoms due to shoulder disease. Conditions included supraspinatus tendinitis (five), chronic rotator cuff rupture (seven), frozen shoulder (two), glenohumeral osteoarthritis (two), apatite related shoulder arthritis (one), stroke related shoulder disease (six). (Some patients had more than one shoulder condition.) The last group included painful stiff shoulders (three), glenohume...

  4. Acute supplementation of N-acetylcysteine does not affect muscle blood flow and oxygenation characteristics during handgrip exercise.

    Science.gov (United States)

    Smith, Joshua R; Broxterman, Ryan M; Ade, Carl J; Evans, Kara K; Kurti, Stephanie P; Hammer, Shane M; Barstow, Thomas J; Harms, Craig A

    2016-04-01

    N-acetylcysteine (NAC; antioxidant and thiol donor) supplementation has improved exercise performance and delayed fatigue, but the underlying mechanisms are unknown. One possibility isNACsupplementation increases limb blood flow during severe-intensity exercise. The purpose was to determine ifNACsupplementation affected exercising arm blood flow and muscle oxygenation characteristics. We hypothesized thatNACwould lead to higher limb blood flow and lower muscle deoxygenation characteristics during severe-intensity exercise. Eight healthy nonendurance trained men (21.8 ± 1.2 years) were recruited and completed two constant power handgrip exercise tests at 80% peak power until exhaustion. Subjects orally consumed either placebo (PLA) orNAC(70 mg/kg) 60 min prior to handgrip exercise. Immediately prior to exercise, venous blood samples were collected for determination of plasma redox balance. Brachial artery blood flow (BABF) was measured via Doppler ultrasound and flexor digitorum superficialis oxygenation characteristics were measured via near-infrared spectroscopy. FollowingNACsupplementaiton, plasma cysteine (NAC: 47.2 ± 20.3 μmol/L vs.PLA: 9.6 ± 1.2 μmol/L;P = 0.001) and total cysteine (NAC: 156.2 ± 33.9 μmol/L vs.PLA: 132.2 ± 16.3 μmol/L;P = 0.048) increased. Time to exhaustion was not significantly different (P = 0.55) betweenNAC(473.0 ± 62.1 sec) andPLA(438.7 ± 58.1 sec). RestingBABFwas not different (P = 0.79) withNAC(99.3 ± 31.1 mL/min) andPLA(108.3 ± 46.0 mL/min).BABFwas not different (P = 0.42) during exercise or at end-exercise (NAC: 413 ± 109 mL/min;PLA: 445 ± 147 mL/min). Deoxy-[hemoglobin+myoglobin] and total-[hemoglobin+myoglobin] were not significantly different (P = 0.73 andP = 0.54, respectively) at rest or during exercise between conditions. We conclude that acuteNACsupplementation does not alter oxygen delivery during exercise in men. PMID:27044854

  5. Dietary lysine affected the expression of genes related to lipid metabolism in skeletal muscle of finishing pigs

    Science.gov (United States)

    It has been reported that some amino acids can function as signaling molecules to regulate skeletal muscle growth in mammals. This study was conducted to identify those genes that may be regulated by amino acid lysine and responsible for muscle growth and meat quality of pigs. Nine crossbred barrows...

  6. JOINT KINETICS TO ASSESS THE INFLUENCE OF THE RACKET ON A TENNIS PLAYER'S SHOULDER

    Directory of Open Access Journals (Sweden)

    Thomas Creveaux

    2013-06-01

    Full Text Available This study aimed at investigating the influence of three rackets on shoulder net joint moments, power and muscle activity during the flat tennis serve under field- conditions. A 6-camera Eagle® motion analysis system, operating at 256 Hz, captured racket and dominant upper limb kinematics of the serve in five tennis players under three racket conditions (A: low mass, high balance and polar moment, B: low three moments of inertia, and C: high mass, swingweight and twistweight. The electromyographic activity of six trunk and arm muscles was simultaneously recorded. Shoulder net joint moments and power were computed by 3D inverse dynamics. The results showed that greater shoulder joint power and internal/external rotation peak moments were found to accelerate and decelerate racket A in comparison with the racket C. Moreover, serving with the racket A resulted in less activity in latissimus dorsi muscle during the acceleration phase, and biceps brachii muscle during the follow-through phase when compared with racket C. These initial findings encourage studying the biomechanical measurements to quantify the loads on the body during play in order to reduce them, and then prevent shoulder injuries. Racket specifications may be a critical point for coaches who train players suffering from shoulder pain and chronic upper limb injuries should be considered in relation to the racket specifications of the players

  7. Shoulder injuries in overhead sports

    International Nuclear Information System (INIS)

    Overhead sport places great demands on the shoulder joint. Shoulder pain in overhead athletes and throwers can in the majority of cases be attributed to lesions resulting from chronic overuse of tendons and capsuloligamentous structures or to sequels of microinstability and secondary impingement. Due to its great impact on therapeutic decisions, imaging in athletes with unclear shoulder pain is a challenge. In this connection, magnetic resonance (MR) arthrography represents the cross-sectional imaging modality of first choice, as it allows depiction and exclusion of pathologic alterations of all relevant joint structures with sufficient confidence. This article reviews the biomechanical and clinical aspects and MR arthrographic features of the most common shoulder pathologies in overhead athletes, including biceps tendinopathy, superior labral anterior-posterior (SLAP) lesions, rotator cuff lesions, as well as extrinsic and intrinsic impingement syndromes. (orig.)

  8. Prospective, double-blind comparison of shoulder MR imaging, US, arthrography, and arthroscopy

    International Nuclear Information System (INIS)

    To determine the efficacy of diagnostic imaging modalities in the evaluation of shoulder pain, magnetic resonance (MR) imaging, ultrasonography (US) and arthrography were prospectively compared in a double-blind experimental protocol. Thirty consecutive patients were studied by these modalities, which received separate, blinded interpretations. The images and interpretations were sealed in an envelope and blinded from the arthroscopist for initial arthroscopy, but second-look arthroscopy, and in some cases open surgery, was performed after the envelopes were unsealed. To avoid selection bias, negative MR and/or US examinations never affected confirmation by arthrography and/or arthroscopy, so negatives and positives were equivalently tested. To date, MR imaging and US are equally sensitive in the detection of rotator cuff tears, but the combination is more sensitive. Both MR imaging and US demonstrated tears not diagnosed by means of arthrography, and MR imaging distinguished hemorrhagic muscle tears from rotator cuff tears, which arthrography and arthroscopy did not. Both MR imaging and US showed characteristic appearances of biceps tendonitis, but neither demonstrated adhesive capsulitis. The authors conclude that all three imaging modalities have a role in shoulder diagnosis

  9. Simultaneous shoulder and elbow dislocation

    OpenAIRE

    Çobanoğlu, Mutlu; Yumrukcal, Feridun; KARATAŞ, Cengiz; Duygun, Fatih

    2014-01-01

    Ipsilateral shoulder and elbow dislocation is very rare and only six articles are present in the literature mentioning this kind of a complex injury. With this presentation we aim to emphasise the importance of assessing the adjacent joints in patients with trauma in order not to miss any accompanying pathologies. We report a case of a 43-year-old female patient with ipsilateral right shoulder and elbow dislocation treated conservatively. The patient reported elbow pain when first admitted to...

  10. Management of the frozen shoulder

    OpenAIRE

    van de Laar SM; van der Zwaal P

    2014-01-01

    Suzanne Margaretha van de Laar, Peer van der Zwaal Department of Orthopaedic Surgery and Trauma, Medical Center Haaglanden, The Hague, the Netherlands Abstract: Frozen shoulder is a very common condition with a prevalence of 2%–5% in the general population. Decrease in joint volume as a result of fibrosis and hyperplasia of the joint capsule leads to painful and restricted glenohumeral motion. Frozen shoulder is a self-limiting disease with a chronic character, and is mostly treated in...

  11. Management of the frozen shoulder

    OpenAIRE

    van der Zwaal, Peer

    2014-01-01

    Suzanne Margaretha van de Laar, Peer van der Zwaal Department of Orthopaedic Surgery and Trauma, Medical Center Haaglanden, The Hague, the Netherlands Abstract: Frozen shoulder is a very common condition with a prevalence of 2%–5% in the general population. Decrease in joint volume as a result of fibrosis and hyperplasia of the joint capsule leads to painful and restricted glenohumeral motion. Frozen shoulder is a self-limiting disease with a chronic character, and is mostly treate...

  12. Arthroscopic findings after shoulder dislocation

    Directory of Open Access Journals (Sweden)

    Medenica Ivica

    2009-01-01

    Full Text Available Background/Aim. Recurrent instability of the shoulder joint is frequently difficult to differentiate from diseased or injured rotator cuff or tendon of the forearm flexor (m. biceps brachii. Shoulder joint arthroscopy has been only recently introduced into instable shoulder joint lesion examination. The aim of this study was to present and analyze an arthroscopic finding on instable shoulder joint in order to determine causes and mechanisms of instability, as well as principles of surgical treatment. Methods. Arthroscopy of the shoulder joint was performed in 158 patients with at least one documented shoulder joint dislocation. These patients were divided into two groups. The group I included the patients with one to three dislocations, while the group II those with more than three dislocations. Preoperative diagnosis was based on anamnestic data and clinical examination using specific tests, and on the diagnosis of shoulder joint using radiography or computed tomography. Results. Out of the total number of the patients 138 (87.34% had injury of the anterior patellar brim, 119 (75.32% had failure of the anterior capsule, 126 (79.75% had compressive cartilage injury of the posterior part of the head of the upper arm bone (Hill-Sachs lesion, 102 (64.56% had insufficiency of glenohumeral tendon, 11 (6.96 had complete cut of the rotator cuff, 23 (14.56% had injury of the posterior patellar brim, 12 (7.59% had injury of the upper anterior-posterior patellar brim (SLAP. Conclusion. According to the obtained results it could be concluded that there is no a unique injury that leads to shoulder joint instability. It is necessary to point out to the significance of anamnesis and clinical examination in making diagnosis. Arthroscopic diagnostics is indicated in clinically unreliable findings as an additional method for determining operative treatment.

  13. Anatomic Total Shoulder System

    Science.gov (United States)

    ... wide osteotome so you don't make a bunch of small passes at the lesser tuberosity and make it a bunch of small pieces. And I think it's important ... externally rotate it to bring the subscap muscle fibers out to see us. Let me see a ...

  14. Anatomic Total Shoulder System

    Medline Plus

    Full Text Available ... wide osteotome so you don't make a bunch of small passes at the lesser tuberosity and make it a bunch of small pieces. And I think it's important ... externally rotate it to bring the subscap muscle fibers out to see us. Let me see a ...

  15. Muscle strength and fatigue in newly diagnosed patients with myasthenia gravis

    DEFF Research Database (Denmark)

    Vinge, Lotte; Andersen, Henning

    2016-01-01

    INTRODUCTION: Dynamometry is increasingly used as an objective measurement of muscle strength in neurological diseases. No study has applied dynamometry in untreated newly diagnosed patients with myasthenia gravis (MG). METHODS: Isometric muscle strength at the shoulder, knee and ankle was...

  16. Branched-chain amino acid supplementation does not enhance athletic performance but affects muscle recovery and the immune system.

    Science.gov (United States)

    Negro, M; Giardina, S; Marzani, B; Marzatico, F

    2008-09-01

    Since the 1980's there has been high interest in branched-chain amino acids (BCAA) by sports nutrition scientists. The metabolism of BCAA is involved in some specific biochemical muscle processes and many studies have been carried out to understand whether sports performance can be enhanced by a BCAA supplementation. However, many of these researches have failed to confirm this hypothesis. Thus, in recent years investigators have changed their research target and focused on the effects of BCAA on the muscle protein matrix and the immune system. Data show that BCAA supplementation before and after exercise has beneficial effects for decreasing exercise-induced muscle damage and promoting muscle-protein synthesis. Muscle damage develops delayed onset muscle soreness: a syndrome that occurs 24-48 h after intensive physical activity that can inhibit athletic performance. Other recent works indicate that BCAA supplementation recovers peripheral blood mononuclear cell proliferation in response to mitogens after a long distance intense exercise, as well as plasma glutamine concentration. The BCAA also modifies the pattern of exercise-related cytokine production, leading to a diversion of the lymphocyte immune response towards a Th1 type. According to these findings, it is possible to consider the BCAA as a useful supplement for muscle recovery and immune regulation for sports events. PMID:18974721

  17. Impact of backpack type on respiratory muscle strength and lung function in children.

    Science.gov (United States)

    Vieira, Ana Christina; Ribeiro, Fernando

    2015-01-01

    We examine the influence of backpack type on lung function and respiratory muscle strength in children. Thirty-seven children were assessed for lung function and inspiratory and expiratory muscle strength under four randomly determined conditions: unloaded erect standing and three conditions carrying 15% of the child's body weight. In these three conditions, children carried the weight on a backpack with bilateral shoulder straps carried over both shoulders, on a backpack with bilateral shoulder straps carried over one shoulder and on a backpack with a mono shoulder strap. Significantly lower forced vital capacity, forced expiratory volume in one second and maximal expiratory pressure were observed when children carried a backpack with a mono shoulder strap compared to the unloaded standing position. In conclusion, the restrictive effect and the decrease in expiratory muscle strength were more pronounced for the backpack with a mono shoulder strap, suggesting that a double strap backpack is preferable to a mono shoulder strap backpack. Practitioner summary: There is little known about the effect of schoolbags on respiratory muscle function. We investigated the influence of backpack type on lung function and respiratory muscle strength. A backpack with a mono shoulder strap created a restrictive effect and a decrease in strength, suggesting that a double strap backpack is preferable to a mono shoulder strap backpack. PMID:25584722

  18. Ultrasound-guided interventional procedures around the shoulder.

    Science.gov (United States)

    Messina, Carmelo; Banfi, Giuseppe; Orlandi, Davide; Lacelli, Francesca; Serafini, Giovanni; Mauri, Giovanni; Secchi, Francesco; Silvestri, Enzo; Sconfienza, Luca Maria

    2016-01-01

    Ultrasound is an established modality for shoulder evaluation, being accurate, low cost and radiation free. Different pathological conditions can be diagnosed using ultrasound and can be treated using ultrasound guidance, such as degenerative, traumatic or inflammatory diseases. Subacromial-subdeltoid bursitis is the most common finding on ultrasound evaluation for painful shoulder. Therapeutic injections of corticosteroids are helpful to reduce inflammation and pain. Calcific tendinopathy of rotator cuff affects up to 20% of painful shoulders. Ultrasound-guided treatment may be performed with both single- and double-needle approach. Calcific enthesopathy, a peculiar form of degenerative tendinopathy, is a common and mostly asymptomatic ultrasound finding; dry needling has been proposed in symptomatic patients. An alternative is represented by autologous platelet-rich plasma injections. Intra-articular injections of the shoulder can be performed in the treatment of a variety of inflammatory and degenerative diseases with corticosteroids or hyaluronic acid respectively. Steroid injections around the long head of the biceps brachii tendon are indicated in patients with biceps tendinopathy, reducing pain and humeral tenderness. The most common indication for acromion-clavicular joint injection is degenerative osteoarthritis, with ultrasound representing a useful tool in localizing the joint space and properly injecting various types of drugs (steroids, lidocaine or hyaluronic acid). Suprascapular nerve block is an approved treatment for chronic shoulder pain non-responsive to conventional treatments as well as candidate patients for shoulder arthroscopy. This review provides an overview of these different ultrasonography-guided procedures that can be performed around the shoulder. PMID:26313499

  19. Reliability and Validity of EN-TreeM Dynamometer for Measurement of Shoulder Rotator Strength in Volleyball Players

    Science.gov (United States)

    Kaleem; Moiz, Jamal Ali; Iqbal, Mohd; Verma, Shalini

    2016-01-01

    Introduction Volleyball involves repeated forceful arm actions that produce a high incidence of shoulder injury. Shoulder rotator strength ratio is an important predictor of the likelihood of shoulder injury, especially, secondary shoulder impingement and instability. Therefore, assessment of muscle strength of external and internal rotators of shoulder is imperative to establish the profiles of shoulder rotator performance, strength ratios, and shoulder mobility of volleyball players. Aim To establish reliability and validity of EN-TreeM dynamometer for the measurement of shoulder rotators strength in volleyball players. Materials and Methods Thirty male volleyball players aged 18-24 years, mean height 1.7m, weight 69.8 Kg and BMI 23.1 participated in the study. They performed 1RM (one repetition maximum) estimation protocols using EN-TreeM dynamometer and free weights for shoulder rotators, to investigate its concurrent validity. A retest using the same protocol was performed 48 hours later to assess test-retest reliability of the EN-TreeM dynamometer. Results The results yielded excellent test-retest reliability (ICC0.96) and internal consistency (Cronbach’s alpha0.98) for both internal and external rotators. The concurrent validity was established using Pearson correlation coefficient (internal rotator r=0.45, p=0.01;External rotator r=0.38, p=0.03). Conclusion The findings establish the reliability and concurrent validity of EN-TreeM dynamometer for the quantification of shoulder rotators strength. Based on these findings in volleyball players, EN-TreeM dynamometer can be used with confidence as an instrument for assessing muscle performance (strength). Additionally, it may also be used for monitoring changes due to rehabilitation interventions in shoulder injuries. PMID:27134986

  20. Development of an Arthroscopic Joint Capsule Injury Model in the Canine Shoulder.

    Directory of Open Access Journals (Sweden)

    David Kovacevic

    Full Text Available The natural history of rotator cuff tears can be unfavorable as patients develop fatty infiltration and muscle atrophy that is often associated with a loss of muscle strength and shoulder function. To facilitate study of possible biologic mechanisms involved in early degenerative changes to rotator cuff muscle and tendon tissues, the objective of this study was to develop a joint capsule injury model in the canine shoulder using arthroscopy.Arthroscopic surgical methods for performing a posterior joint capsulectomy in the canine shoulder were first defined in cadavers. Subsequently, one canine subject underwent bilateral shoulder joint capsulectomy using arthroscopy, arthroscopic surveillance at 2, 4 and 8 weeks, and gross and histologic examination of the joint at 10 weeks.The canine subject was weight-bearing within eight hours after index and follow-up surgeries and had no significant soft tissue swelling of the shoulder girdle or gross lameness. Chronic synovitis and macroscopic and microscopic evidence of pathologic changes to the rotator cuff bony insertions, tendons, myotendinous junctions and muscles were observed.This study demonstrates feasibility and proof-of-concept for a joint capsule injury model in the canine shoulder. Future work is needed to define the observed pathologic changes and their role in the progression of rotator cuff disease. Ultimately, better understanding of the biologic mechanisms of early progression of rotator cuff disease may lead to clinical interventions to halt or slow this process and avoid the more advanced and often irreversible conditions of large tendon tears with muscle fatty atrophy.

  1. Shoulder Injuries in US Astronauts Related to EVA Suit Design

    Science.gov (United States)

    Scheuring, Rick; McCulloch, Pat; Van Baalen, Mary; Watson, Richard; Bowen, Steve; Blatt, Terri

    2012-01-01

    There are multiple factors associated with the mechanism of injury that leads to shoulder injury requiring surgical repair. Despite the injury prevention measures taken from the 2003 Shoulder Tiger Team recommendations, shoulder injuries and subsequent shoulder surgeries remain relatively unchanged.

  2. Deformations in the Shoulder Tissues During Load Carriage: A Computational Model.

    Science.gov (United States)

    Hadid, Amir; Belzer, Noa; Shabshin, Nogah; Epstein, Yoram; Gefen, Amit

    2015-11-01

    Shoulder soft tissue deformations seem to be one of the limiting factors of load carriage among soldiers and recreational backpackers that are required to carry heavy loads. Yet, there are no loading limits related to the forces borne by the shoulders, and the backpacks designs are not consistent with providing pressure relief from this sensitive anatomical region. The aim of this study was to develop a model that will enable to study the biomechanical loads that develop in the shoulder under heavy loads and to help in optimizing load carriage systems design. A 3-dimensional, anatomically accurate finite element model of a human shoulder was constructed based on MRI scans. The model was developed to calculate the effective stresses on the skin below the shoulder strap (superficial loads) and the effective strain in the brachial plexus region (inner tissue deformation) for loads of up to 35 kg. The model successfully predicted deformations in the soft tissue surrounding the brachial plexus when compared with deformations measured from load-bearing MRI scans. The model yielded a skin pressure mapping, which showed pressure hotspots in the clavicle region. Inner tissue deformations mapping, as assessed by brachial plexus envelop strains, were found to peak at 30% effective strain at the lateral aspect below the pectoralis muscle. The newly developed model successfully predicted soft tissue deformations in the shoulder related to backpacks. This model can be used to optimize load carriage systems for better distribution of pressure over the shoulders and lower inner tissue deformations. PMID:26506178

  3. Simultaneous bilateral anterior shoulder dislocation: report of two cases and review of the literature

    Directory of Open Access Journals (Sweden)

    Tripathy Sujit Kumar

    2012-02-01

    Full Text Available 【Abstract】Bilateral shoulder dislocations are rare and almost always occur in the posterior direction. Simultaneous bilateral anterior shoulder dislocation is even rarer and only a few cases are stated in the literature. The most interesting part of a bilateral shoulder dislocation is about its injury mechanism as a synchronous and simultaneous force is needed to result in it. In cases of epilepsy or electrocution, the mechanism is different and the forceful contractions of the selective group of muscles result in the dislocation. This article reports two cases of bilateral simultaneous anterior shoulder joint dislocation that occurred after a road side accident and after an episode of convulsion in an epileptic patient. The dislocations were diagnosed early and reduced immediately with a proper postreduction rehabilitation. During their follow-up, both patients had sa-tisfactory functional outcome. This article emphasizes on the importance of shoulder examination in road side accident victims and epileptic patients. All orthopedic surgeons and emergency physicians should be aware of such unusual possibilities to have an early diagnosis and treatment. An early reduction and appropriate rehabilitation can provide satisfactory functional outcome. This article also briefly discusses the injury mechanisms, diagnoses and treatments of bilateral shoulder dislocation as reported in the literature. Key words: Shoulder dislocation; Epilepsy; Accidents, traffic

  4. Electromyographic activity of shoulder muscles during exercises performed with oscillatory and non-oscillatory poles Atividade eletromiográfica dos músculos do ombro durante exercícios executados com hastes oscilatória e não oscilatória

    Directory of Open Access Journals (Sweden)

    Camilla Z. Hallal

    2011-04-01

    Full Text Available BACKGROUND: Pain and dysfunction of the shoulder complex are commonly found physiotherapy practice. These musculoskeletal abnormalities are related to instability and inadequate kinematic function, that depend on the integrity of the muscle tissues. Thus, to enhance the results of exercise therapies, and prevent and attenuate pain and dynfunction, the use of oscillatory pole has been implemented in clinical practice. OBJECTIVES: The purpose of this study was to analyze the electromyographic (EMG activity of shoulder stabilizing muscles during exercises performed with an oscillatory and a non-oscillatory pole. METHODS: Twelve female volunteers, aged 20.4 years±1.9, participated in this study. EMG data were collected from upper trapezius (UT, lower trapezius (LT and middle deltoid (MD during three different exercises with an oscillatory and a non-oscillatory pole. The EMG signals were analyzed in the time domain through the calculation of Root Mean Square (RMS. The RMS values were normalized by the peak value obtained over all trials for each muscle. Statistical analysis was performed with repeated measures ANOVA and post-hoc of Bonferroni tests. RESULTS: The EMG activity of UT, LT and MD muscles were significantly higher with the oscillatory pole than the non-oscillatory pole (all pCONTEXTUALIZAÇÃO: A dor e a disfunção no complexo articular do ombro é comumente encontrada na prática fisioterapêutica. Essas anormalidades musculoesqueléticas estão relacionadas à instabilidade e inadequado funcionamento cinemático, que dependem da integridade dos tecidos musculares. Assim, no sentido de prevenir e reabilitar esses sintomas, o uso da haste oscilatória vem sendo implantado para melhorar os resultados de técnicas cinesioterapêuticas. OBJETIVOS: Analisar a atividade eletromiográfica (EMG dos músculos que estabilizam a articulação do ombro durante a realização de exercícios com haste oscilatória e haste não-oscilatória. M

  5. Simultaneous shoulder and elbow dislocation

    Science.gov (United States)

    Çobanoğlu, Mutlu; Yumrukcal, Feridun; Karataş, Cengiz; Duygun, Fatih

    2014-01-01

    Ipsilateral shoulder and elbow dislocation is very rare and only six articles are present in the literature mentioning this kind of a complex injury. With this presentation we aim to emphasise the importance of assessing the adjacent joints in patients with trauma in order not to miss any accompanying pathologies. We report a case of a 43-year-old female patient with ipsilateral right shoulder and elbow dislocation treated conservatively. The patient reported elbow pain when first admitted to emergency service but she was diagnosed with simultaneous ipsilateral shoulder and elbow injury and treated conservatively. As a more painful pathology may mask the additional ones, one should hasten to help before performing a complete evaluation. Any harm caused to the patient due to this reason would not be a complication but a malpractice. PMID:24859563

  6. MR imaging of the shoulder

    International Nuclear Information System (INIS)

    Magnetic resonance (MR) imaging (1.5-T unit) was performed in over 600 shoulders to evaluate shoulder pain. Ultrasound (US) and arthrography were performed in over 100 patients. Surgery was performed in over 75 patients. MR imaging offers information not well evaluated with other modalities, including bony impingement, tendinitis, bursitis, and osseous abnormalities, such as primary arthritis, avascular necrosis, occult fractures, and tumors. US and MR findings correlate well with surgical findings for medium to large rotator cuff tears. MR imaging with T2 weighting is superior for differentiating small tears from associated tendinitis. An algorithm for cost-effective shoulder imaging integrating US, MR imaging, arthrography, and computed tomographic arthrography are presented

  7. Bankart Repair to Correct Shoulder Instability

    Medline Plus

    Full Text Available ... here. This is a pretty restrictive harness that athletes wear. And you can see that it wraps ... stiff shoulder. And a stiff shoulder for an athlete isn't exactly a great thing. So, I ...

  8. Bankart Repair to Correct Shoulder Instability

    Medline Plus

    Full Text Available ... shoulder – how do you approach those two as far as treatment recommendations and your expectations for success ... it holds the shoulder from going up too far into that risky position, or too far back ...

  9. Bankart Repair to Correct Shoulder Instability

    Medline Plus

    Full Text Available ... 13:23 Now we're moving into the space between that ball and cup that Joe so… ... glenoid socket for the shoulder. There's a wide space in this boy's shoulder, which is partially due ...

  10. Bankart Repair to Correct Shoulder Instability

    Medline Plus

    Full Text Available ... that when that shoulder is in that at risk position…The shoulder's pretty darn stable down here ... do this procedure without putting the patient at risk? Is it a question of seeing one, assisting ...

  11. Heterotopic bone formation following total shoulder arthroplasty

    DEFF Research Database (Denmark)

    Kjaersgaard-Andersen, P.; Frich, Lars Henrik; Sjøbjerg, J.O.;

    1989-01-01

    the glenohumeral and/or the glenoacromial space. There was no correlation between shoulder pain and the development of ossification. Shoulders with grade III heterotopic bone formation had a limited range of active elevation compared with shoulders without or with only a milder lesion. Men and......The incidence and location of heterotopic bone formation following total shoulder arthroplasty were evaluated in 58 Neer Mark-II total shoulder replacements. One year after surgery, 45% had developed some ectopic ossification. In six shoulders (10%) the ossifications roentgenographically bridged...... patients with osteoarthritis of the shoulder joint were significantly disposed to the development of heterotopic bone. Heterotopic bone formation following total shoulder arthroplasty is frequent, but disabling heterotopic ossifications seem to be rare....

  12. Bankart Repair to Correct Shoulder Instability

    Medline Plus

    Full Text Available ... So there are two of what we call plastic cannulas that actually go into the shoulder and ... of the shoulder joints we have several different plastic cannulas that we used, as I mentioned, to ...

  13. Bankart Repair to Correct Shoulder Instability

    Medline Plus

    Full Text Available ... type device that utilizes tiny one quarter inch holes around the shoulder joint in order to tighten ... we're trying to do is establish other holes in the shoulder to actually work through. So ...

  14. Painful Shoulder in Swimmers: A Diagnostic Challenge.

    Science.gov (United States)

    McMaster, William C.

    1986-01-01

    This article discusses the incidence, diagnosis, and treatment of painful shoulder in swimmers, including: regional problems that can cause shoulder pain; physical, clinical, and laboratory tests for diagnostic use; and approaches to management of the problem. (Author/CB)

  15. Bankart Repair to Correct Shoulder Instability

    Medline Plus

    Full Text Available ... what we hear in a patient that has disability from an unstable shoulder. And I think we' ... inside of the shoulder joint with quite good visual acuity. We can really tell with great detail ...

  16. Bankart Repair to Correct Shoulder Instability

    Medline Plus

    Full Text Available ... the glenoid socket for the shoulder. There's a wide space in this boy's shoulder, which is partially ... the cartilage that are torn, but also the wide spaces due to the fact that the ligaments ...

  17. Growth hormone stimulates the collagen synthesis in human tendon and skeletal muscle without affecting myofibrillar protein synthesis

    DEFF Research Database (Denmark)

    Doessing, Simon; Heinemeier, Katja; Holm, Lars;

    2010-01-01

    In skeletal muscle and tendon the extracellular matrix confers important tensile properties and is crucially important for tissue regeneration after injury. Musculoskeletal tissue adaptation is influenced by mechanical loading, which modulates the availability of growth factors, including growth...... hormone (GH) and insulin-like growth factor-I (IGF-I), which may be of key importance. To test the hypothesis that GH promotes matrix collagen synthesis in musculotendinous tissue, we investigated the effects of 14 day administration of 33-50 microg kg(-1) day(-1) recombinant human GH (rhGH) in healthy...... young individuals. rhGH administration caused an increase in serum GH, serum IGF-I, and IGF-I mRNA expression in tendon and muscle. Tendon collagen I mRNA expression and tendon collagen protein synthesis increased by 3.9-fold and 1.3-fold, respectively (P < 0.01 and P = 0.02), and muscle collagen I m...

  18. An investigation of shoulder forces in active shoulder tackles in rugby union football.

    Science.gov (United States)

    Usman, Juliana; McIntosh, Andrew S; Fréchède, Bertrand

    2011-11-01

    In rugby union football the tackle is the most frequently executed skill and one most associated with injury, including shoulder injury to the tackler. Despite the importance of the tackle, little is known about the magnitude of shoulder forces in the tackle and influencing factors. The objectives of the study were to measure the shoulder force in the tackle, as well as the effects of shoulder padding, skill level, side of body, player size, and experimental setting on shoulder force. Experiments were conducted in laboratory and field settings using a repeated measures design. Thirty-five participants were recruited to the laboratory and 98 to the field setting. All were male aged over 18 years with rugby experience. The maximum force applied to the shoulder in an active shoulder tackle was measured with a custom built forceplate incorporated into a 45 kg tackle bag. The overall average maximum shoulder force was 1660 N in the laboratory and 1997 N in the field. This difference was significant. The shoulder force for tackling without shoulder pads was 1684 N compared to 1635 N with shoulder pads. There was no difference between the shoulder forces on the dominant and non-dominant sides. Shoulder force reduced with tackle repetition. No relationship was observed between player skill level and size. A substantial force can be applied to the shoulder and to an opponent in the tackle. This force is within the shoulder's injury tolerance range and is unaffected by shoulder pads. PMID:21689986

  19. 21 CFR 888.3690 - Shoulder joint humeral (hemi-shoulder) metallic uncemented prosthesis.

    Science.gov (United States)

    2010-04-01

    ... uncemented prosthesis. 888.3690 Section 888.3690 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF... Shoulder joint humeral (hemi-shoulder) metallic uncemented prosthesis. (a) Identification. A shoulder joint humeral (hemi-shoulder) metallic uncemented prosthesis is a device made of alloys, such as...

  20. 21 CFR 888.3680 - Shoulder joint glenoid (hemi-shoulder) metallic cemented prosthesis.

    Science.gov (United States)

    2010-04-01

    ... cemented prosthesis. 888.3680 Section 888.3680 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF... Shoulder joint glenoid (hemi-shoulder) metallic cemented prosthesis. (a) Identification. A shoulder joint glenoid (hemi-shoulder) metallic cemented prosthesis is a device that has a glenoid (socket)...

  1. MRI role in morphological and functional assessment of the levator ani muscle: Use in patients affected by stress urinary incontinence (SUI) before and after pelvic floor rehabilitation

    Energy Technology Data Exchange (ETDEWEB)

    Del Vescovo, Riccardo, E-mail: r.delvescovo@unicampus.it; Piccolo, Claudia Lucia, E-mail: c.piccolo@unicampus.it; Vecchia, Nicoletta Della, E-mail: nico.dvecchia@libero.it; Giurazza, Francesco, E-mail: f.giurazza@unicampus.it; Cazzato, Roberto Luigi, E-mail: r.cazzato@unicampus.it; Grasso, Rosario Francesco, E-mail: r.grasso@unicampus.it; Zobel, Bruno Beomonte, E-mail: b.zobel@unicampus.it

    2014-03-15

    Objective: Pelvic floor dysfunctions affect a very high proportion of female population. Magnetic resonance imaging is the only technique able to provide a multiplanar overview of pelvic organs and muscles without the use of ionizing radiation. The aim of our prospective study is to objectively evaluate the effectiveness of perineal re-education applying MR technique. Materials and methods: 22 patients affected by stress urinary incontinence were enrolled in our prospective study. They underwent urogynaecological, urodynamic examinations, and a questionnaire about symptoms (ICIQ-UI) to investigate the degree of their interference with daily activities. Then they underwent a morphological and dynamic MR exam. Results: The pre-perineal rehabilitation MR examinations showed an asymmetry of the levator ani muscle in 87% of patients; the remaining 13% showed a muscular bilateral volume reduction. In the group with unilateral defect, the muscle total volume had values between 15 and 21 cm{sup 3}. Its overall volume was 34.2% smaller on the defective side (9.28 ± 0.26 cm{sup 3}) compared to the normal side (12.64 ± 12.31 cm{sup 3}, P < 0.001). In patients with a bilateral impairment, the muscle was replaced by fibro-fatty tissue, without a significant asymmetry between the two sides. The post-perineal rehabilitation MR tests showed three different degrees of response to therapy, with a “complete response” found in 67% of patients and no response in 13%. Conclusions: MR is an useful tool in the management of patients affected by stress urinary incontinence with indication for perineal rehabilitation. Its objective data allow to distinguish different types of response to therapy and, consequently, different outcomes in terms of additional treatments.

  2. MRI role in morphological and functional assessment of the levator ani muscle: Use in patients affected by stress urinary incontinence (SUI) before and after pelvic floor rehabilitation

    International Nuclear Information System (INIS)

    Objective: Pelvic floor dysfunctions affect a very high proportion of female population. Magnetic resonance imaging is the only technique able to provide a multiplanar overview of pelvic organs and muscles without the use of ionizing radiation. The aim of our prospective study is to objectively evaluate the effectiveness of perineal re-education applying MR technique. Materials and methods: 22 patients affected by stress urinary incontinence were enrolled in our prospective study. They underwent urogynaecological, urodynamic examinations, and a questionnaire about symptoms (ICIQ-UI) to investigate the degree of their interference with daily activities. Then they underwent a morphological and dynamic MR exam. Results: The pre-perineal rehabilitation MR examinations showed an asymmetry of the levator ani muscle in 87% of patients; the remaining 13% showed a muscular bilateral volume reduction. In the group with unilateral defect, the muscle total volume had values between 15 and 21 cm3. Its overall volume was 34.2% smaller on the defective side (9.28 ± 0.26 cm3) compared to the normal side (12.64 ± 12.31 cm3, P < 0.001). In patients with a bilateral impairment, the muscle was replaced by fibro-fatty tissue, without a significant asymmetry between the two sides. The post-perineal rehabilitation MR tests showed three different degrees of response to therapy, with a “complete response” found in 67% of patients and no response in 13%. Conclusions: MR is an useful tool in the management of patients affected by stress urinary incontinence with indication for perineal rehabilitation. Its objective data allow to distinguish different types of response to therapy and, consequently, different outcomes in terms of additional treatments

  3. Experiences of returning to elite beach volleyball after shoulder injury.

    Science.gov (United States)

    Bele, Sofie; Östenberg, Anna Hafsteinsson; Sjöström, Rita; Alricsson, Marie

    2015-08-01

    The purpose of this study was to examine beach volleyball players' experience regarding shoulder injury and how it affects their return to play. To achieve the research aims a qualitative design with semi-structured interviews had been conducted, five elite beach volleyball players, four men and one woman aged 27-42 participated in the study. All participants had suffered a severe shoulder injury, with absence from training and competing for at least 28 days. The findings of this study indicate that it is the individual's inner motivation, together with a clear goal and support from the community, family, teammate and coach that are the most important factors when going through rehabilitation and getting back to playing beach volleyball after a shoulder injury. All participants had been affected by their injury in some way; some of the participants had been affected in a positive way since they had become mentally stronger and had developed better volleyball technique after rehabilitation. The conclusions of this study indicate that there are three distinct factors that increase the chances of getting back to playing beach volleyball after shoulder injury; it is the players' self motivation, together with a clear goal and support from the community. PMID:26331135

  4. Shoulder arthography in rheumatoid arthritis

    International Nuclear Information System (INIS)

    Shoulder arthrography in a patient with rheumatoid arthritis is performed to differentiate between a rheumatoid flare and limitation of motion secondary to tear in the rotator cuff. Accurate diagnosis is important because of the therapeutic implications. The arthrographic findings characteristic of rheumatoid involvement of the shoulder joint are nodular filling defects of the joint, the subacromial and subdeltoideal bursa in case of rotator cuff tear, irregular capsular attachment, contracted joint space and visualized lymphatic drainage. A dilatation of the biceps tendon sheath has not been shown. (orig.)

  5. The arthrography of the shoulder

    International Nuclear Information System (INIS)

    The main reason for making an arthrography of the shoulder is to confirm, or exclude, a rupture of the rotator cuff. In the years 1978 to 1987, 650 arthrographies of the shoulder joint have been made in the radiological center of Freiburg University, Department for X-ray diagnostics, and in 75.1% of the cases the reason was clinically suspected rupture of the rotator cuff. In 74 cases, (i.e. 11.4%), surgical treatment was confirmed to be necessary by the arthrography. (orig./GDG)

  6. COMPARISON BETWEEN ULTRASONOGRAPHY RESULTS AND RESULTS OF MAGNETIC RESONANCE IN SHOULDER PATHOLOGY – CASE REPORT

    Directory of Open Access Journals (Sweden)

    Karmela Filipović

    2013-12-01

    Full Text Available The common pathological condition of the shoulder joint is rotator cuff diseases. Patient, 68 years, had pain in the shoulder with limited joint mobility. After clinical examination, blood tests (SE >100 nmol/L, CSF normal, hypergamma- globulinemia and radiographic examination (bone dilution with deformities of the humeral head, a solitary plasmocytoma was suspected. This diagnosis was excluded after biopsy. Patient was referred to the magnetic resonance imaging (MRI of the shoulder, so ultrasonographic (US examination was performed. Our case study points to comparability between US and MRI results regarding tendinitis of muscles in the rotator cuff. By applying both diagnostic methods, calcifications within muscle tendons were evident. Sonography is faster, cheaper, more accessible and readily available method that certainly is a valuable tool for clinicians when it comes to rotator cuff lesions.

  7. The Origin and Implications of the Shoulder in Reactor Neutrino Spectra

    CERN Document Server

    Hayes, A C; Garvey, G T; Ibeling, Duligur; Jungman, Gerard; Kawano, T; Mills, Robert W

    2015-01-01

    We analyze within a nuclear database framework the shoulder observed in the antineutrino spectra in current reactor experiments. We find that the ENDF/B-VII.1 database predicts that the antineutrino shoulder arises from an analogous shoulder in the aggregate fission beta spectra. In contrast, the JEFF-3.1.1 database does not predict a shoulder. We consider several possible origins of the shoulder, and find possible explanations. For example, there could be a problem with the measured aggregate beta spectra, or the harder neutron spectrum at a light-water power reactor could affect the distribution of beta-decaying isotopes. In addition to the fissile actinides, we find that $^{238}$U could also play a significant role in distorting the total antineutrino spectrum. Distinguishing these and quantifying whether there is an anomaly associated with measured reactor neutrino signals will require new short-baseline experiments, both at thermal reactors and at reactors with a sizable epithermal neutron component.

  8. An electromyographic evaluation of elastic band exercises targeting neck and shoulder pain among helm bearing military helicopter crew

    DEFF Research Database (Denmark)

    Kristensen, Lars Askær; Grøndberg, Thomas Stig; Murray, Mike;

    during an elastic band exercise program targeting neck and shoulder pain among military helicopter pilots and crew. METHODS The study was conducted in a laboratory setting at University of Southern Denmark, Odense. A group of 11 healthy males (25,9±1,4 years) with no pain in neck or shoulders (VAS=0......INTRODUCTION Flight related neck and shoulder pain is a frequent problem in helicopter pilots and crew [1]. Pain causes personnel suffering, reduces operational capabilities and incurs high financial cost due to the loss of manpower. Evidence suggests that the occupational loading such as posture...... the neck and shoulder muscles using elastic bands has been applied for helicopter pilots and crew in the Royal Danish Air Force to prevent and reduce pain. The exercise program had an initial loading of 20RM and was increased progressively towards 12RM in the final weeks. A muscle activity >60% MVE is...

  9. 49 CFR 572.184 - Shoulder assembly.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 7 2010-10-01 2010-10-01 false Shoulder assembly. 572.184 Section 572.184... Dummy, 50th Percentile Adult Male § 572.184 Shoulder assembly. (a) The shoulder (175-3000) is part of the body assembly shown in drawing 175-0000. When subjected to impact tests specified in paragraph...

  10. Periarthritis of the shoulder-MRI findings

    Energy Technology Data Exchange (ETDEWEB)

    Hirano, Mako; Nomura, Kazutoshi; Hashimoto, Noburo; Fukumoto, Tetsuya; Oshima, Suguru; Katahira, Kazuhiro [Kumamoto National Hospital (Japan)

    1997-09-01

    We examined MRI findings in patients with periarthritis of the shoulder. We excluded cuff tears, calcified tendinitis, instability of the shoulder, fracture and impingement syndrome of young patients. Subjects comprised 36 cases, 38 shoulders (25 men and 11 women), with an average age of 59.1 years (42-75). Scanning was performed on a Gyroscan T5-II 0.5-T (Philips). T1-weighted and T2-weighted sequences in the coronal oblique plane, T2-weighted sequences in the coronal sagittal plane and horizontal plane were taken. Twelve shoulders showed some change in the humeral heads. Degeneration of the rotator cuff was observed in 15 shoulders. Joint fluid collection was observed in the gleno-humeral joints of 15 shoulders, in the subacromial bursa of 11 shoulders and in the acromio-clavicular joints of 7 shoulders. Twenty four shoulders had fluid collection in the sheath of the long head of the biceps long tendon. Localized high signal area was observed around the inferior pouch in 11 shoulders. We studied the relationship between MRI findings and clinical symptoms. There was no significant relationship but the shoulders with night pain and severe contractures had a higher positive rate of joint fluid collection on MRI than the shoulders without night pain and with less contractures. (author)

  11. Periarthritis of the shoulder-MRI findings

    International Nuclear Information System (INIS)

    We examined MRI findings in patients with periarthritis of the shoulder. We excluded cuff tears, calcified tendinitis, instability of the shoulder, fracture and impingement syndrome of young patients. Subjects comprised 36 cases, 38 shoulders (25 men and 11 women), with an average age of 59.1 years (42-75). Scanning was performed on a Gyroscan T5-II 0.5-T (Philips). T1-weighted and T2-weighted sequences in the coronal oblique plane, T2-weighted sequences in the coronal sagittal plane and horizontal plane were taken. Twelve shoulders showed some change in the humeral heads. Degeneration of the rotator cuff was observed in 15 shoulders. Joint fluid collection was observed in the gleno-humeral joints of 15 shoulders, in the subacromial bursa of 11 shoulders and in the acromio-clavicular joints of 7 shoulders. Twenty four shoulders had fluid collection in the sheath of the long head of the biceps long tendon. Localized high signal area was observed around the inferior pouch in 11 shoulders. We studied the relationship between MRI findings and clinical symptoms. There was no significant relationship but the shoulders with night pain and severe contractures had a higher positive rate of joint fluid collection on MRI than the shoulders without night pain and with less contractures. (author)

  12. Shoulder Impingement/Rotator Cuff Tendinitis

    Science.gov (United States)

    .org Shoulder Impingement/Rotator Cuff Tendinitis Page ( 1 ) One of the most common physical complaints is shoulder pain. Your shoulder is made up of several ... is vulnerable to many different problems. The rotator cuff is a frequent source of pain in the ...

  13. Gimbaled-shoulder friction stir welding tool

    Science.gov (United States)

    Carter, Robert W. (Inventor); Lawless, Kirby G. (Inventor)

    2010-01-01

    A gimbaled-shoulder friction stir welding tool includes a pin and first and second annular shoulders coupled to the pin. At least one of the annular shoulders is coupled to the pin for gimbaled motion with respect thereto as the tool is rotated by a friction stir welding apparatus.

  14. 14 CFR 91.521 - Shoulder harness.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Shoulder harness. 91.521 Section 91.521... Airplanes and Fractional Ownership Program Aircraft § 91.521 Shoulder harness. (a) No person may operate a... seat at a flight deck station with a combined safety belt and shoulder harness that meets...

  15. Knockout of the predominant conventional PKC isoform, PKCalpha, in mouse skeletal muscle does not affect contraction-stimulated glucose uptake

    DEFF Research Database (Denmark)

    Jensen, Thomas E; Maarbjerg, Stine J; Rose, Adam J; Leitges, Michael; Richter, Erik

    2009-01-01

    Conventional (c) protein kinase C (PKC) activity has been shown to increase with skeletal muscle contraction, and numerous studies using primarily pharmacological inhibitors have implicated cPKCs in contraction-stimulated glucose uptake. Here, to confirm that cPKC activity is required for...

  16. A Rare unusual case presentation of the Tuberculosis of the Shoulder Joint

    Directory of Open Access Journals (Sweden)

    Ashwin Deshmukh

    2013-10-01

    Full Text Available Introduction: Afflictions of shoulder by tuberculosis is rare and when it occurs its more commonly a dry lesion (caries sicca. Wet lesions in shoulder are rare and we report this case for the rarity of its occurrence. Case Report: A 55yrs old female patient presented with a painful swelling with restriction of movements of the right shoulder since six months. Patient had taken various treatments without any relief; there was no history of trauma, weight loss, recent infection in the past or any history of tuberculosis in family or contact with tubercular patient. Right shoulder revealed restricted movements with no local rise in temperature. Tenderness was present over anterior and posterior aspect of the right shoulder diffusely. External rotation and abduction movements were restricted while adduction and flexion were not restricted. Power of the muscles was unaffected with no neurological deficit. Antero-posterior and axial X-rays of the right shoulder showed no bony involvement however, ultrasonography showed lipoma. Serological investigations showed a markedly raised erythrocyte sedimentation rate (73mm / hr and a positive C-reactive protein. Surgical excision of the mass revealed rice bodies. DNA PCR was positive for tuberculosis and patient was started on anti-tubercular treatment( Category I for six months. Conclusion: Any patient coming with the complaints of long standing painful restriction of the movements of the shoulder associated with or without complaints swelling, shall be evaluated to rule out skeletal tuberculosis along with other differential diagnosis of periarthritis of shoulder and adhesive capsulitis. Most of the patients with skeletal tuberculosis may not necessarily present with the constitutional symptoms of fever, weight loss, etc and also because of the widespread prevalence of the organism in India. Keywords: Shoulder Tuberculosis, Caries Sicca, rice bodies.

  17. A randomized controlled intervention trial to relieve and prevent neck/shoulder pain

    DEFF Research Database (Denmark)

    Andersen, Lars; Jørgensen, Marie Birk; Blangsted, Anne;

    2008-01-01

    PURPOSE:: The objective of this study is to investigate the effect of three different workplace interventions on long-term compliance, muscle strength gains, and neck/shoulder pain in office workers. METHODS:: A 1-yr randomized controlled intervention trial was done with three groups: specific...

  18. A new autoreduction method for anterior shoulder dislocation: the GONAIS method.

    Science.gov (United States)

    Gonai, Shiro; Kamio, Yoshito; Matsuoka, Tomoyuki; Harunari, Manabu; Saito, Yutaka; Takuma, Kiyotsugu

    2016-01-01

    Although techniques for autoreduction of anterior shoulder dislocation have been developed, no reports have detailed an autoreduction method using the zero position and traction on the affected arm. Therefore, we developed a new autoreduction technique using the zero position and gentle autotraction. The objective of this study is to present our experience with a new method for autoreduction of anterior shoulder dislocation called the GONAIS (a backronym for “Grasp a waist-high object, Opposite arm assists, Nonsedated, Autoreduction/autotraction, Immobilize the grasped object, and Squatting and stooping”) method. A 41-year-old healthy woman with a history of left shoulder dislocation presented to the emergency department with left shoulder pain while attaching her seatbelt. The X-ray examination revealed subcoracoid dislocation of the left shoulder. The patient tried the GONAIS method after simple guidance and demonstration. Although she felt pain once when weakening traction, she achieved autoreduction successfully in only 2 min and 50 s. Clinical examination after autoreduction revealed normal neurovascular findings and appearance of the shoulder. The X-ray revealed glenohumeral joint reduction and no fracture. Here, our patient using the GONAIS method achieved shoulder autoreduction in a short time. The GONAIS method does not require lying down or sitting on the ground, does not necessarily require the opposite arm, and is minimally invasive. This method would likely be helpful for those who cannot quickly reach a hospital for treatment of anterior shoulder dislocation. PMID:26168697

  19. Magnetic Resonance Imaging of Rotator Cuff Tears in Shoulder Impingement Syndrome

    International Nuclear Information System (INIS)

    Shoulder joint is a common site of musculoskeletal pain caused, among other things, by rotator cuff tears due to narrowing of subacromial space, acute trauma or chronic shoulder overload. Magnetic resonance imaging (MRI) is an excellent modality for imaging of soft tissues of the shoulder joint considering a possibility of multiplanar image acquisition and non-invasive nature of the study. The aim of this study was to evaluate the prevalence of partial and complete rotator cuff tears in magnetic resonance images of patients with shoulder impingement syndrome and to review the literature on the causes and classification of rotator cuff tears. We retrospectively analyzed the results of 137 shoulder MRI examinations performed in 57 women and 72 men in Magnetic Resonance facility of the Department of Radiology and Diagnostic Imaging at the St. Jadwiga the Queen Regional Hospital No. 2 in Rzeszow between June 2010 and February 2013. Examinations were performed using Philips Achieva 1.5T device, including spin echo and gradient echo sequences with T1-, T2- and PD-weighted as well as fat saturation sequences in transverse, frontal and sagittal oblique planes. Patients were referred from hospital wards as well as from outpatient clinics of the subcarpathian province. The most frequently reported injuries included partial supraspinatus tendon tear and complete tearing most commonly involved the supraspinatus muscle tendon. The smallest group comprised patients with complete tear of subscapularis muscle tendon. Among 137 patients in the study population, 129 patients suffered from shoulder pain, including 57 patients who reported a history of trauma. There was 44% women and 56% men in a group of patients with shoulder pain. Posttraumatic shoulder pain was predominantly reported by men, while women comprised a larger group of patients with shoulder pain not preceded by injury. Rotator cuff injury is a very common pathology in patients with shoulder impingement syndrome

  20. MRI of Little Leaguer's shoulder

    International Nuclear Information System (INIS)

    The MRI appearance of 'Little Leaguer's shoulder' has not been previously reported in the radiology literature. Purported etiologies include proximal humeral epiphyseolysis, osteochondrosis of the proximal humeral epiphysis, stress fracture of the proximal humeral epiphyseal plate, and rotational stress fracture of the proximal humeral epiphyseal plate. We describe magnetic resonance imaging findings in four patients and review the literature. (orig.)

  1. Shoulder pain in general practice

    OpenAIRE

    Vassallo, Kenneth

    2008-01-01

    Case scenario A 65 year old gentleman presented with a 1 week history of pain in the left shoulder. Pain started after spending 2 days painting his house. He was taking paracetamol regularly yet it only gave him minor relief. On examination he had a painful arch and was tender under the acromium.

  2. MR arthrography of the shoulder

    International Nuclear Information System (INIS)

    Full text: MR arthrography is a minimal invasive method, where first contrast media (CM) is applied intraarticular under fluoroscopic guidance and then MR examination is performed. the well-distended joint and the CM entering through the damaged structures enhance greatly the diagnostic capabilities of the method. Learning objectives: to present the technical aspects of performing MR arthrography of the shoulder; to outline the advantages and indications of the method; to demonstrate the normal variants and some of the most common pathological findings seen on MR arthrography of the shoulder. The shoulder joint pathologies are very heterogeneous in nature. Rotatory cuff and labral tears present major portion of the pathology seen in athletes and elderly people with degenerative changes. MR arthrography significantly improves the depiction of complete and partial tears of the rotatory cuff and damages to the capsular ligamentous complex and the glenoid labrum. The method also helps differentiating some normal variants from traumatic injuries. MR arthrography is affirming as golden standard for the investigation of patients with shoulder instability and surpasses conventional MRI examination in the diagnosis of partial rotatory cuff tears and labral tears

  3. Electromyogram-controlled assistive exercise for the motor recovery of shoulder in chronic hemiplegia: A pilot study.

    Science.gov (United States)

    Park, Byung Kyu; Kim, Ji-Won; Kwon, Yuri; Heo, Jae-Hoon; Yoon, Joo-Seok; Eom, Gwang-Moon

    2015-01-01

    Correct-active-repetitive exercise is important for the motor recovery in hemiplegics. The present study hypothesizes that the electromyogram (EMG)-controlled assistance of motion would be an effective implementation of the concept for the rehabilitation of the hemiplegic shoulder, even in chronic patients. This study aims to investigate the feasibility of the suggested method. The motor intention is derived from the EMG of the shoulder muscles and the shoulder movement (flexion and abduction) is assisted by an electro-mechanical system only when the motor intention (EMG amplitude) exceeded the threshold. Twelve patients in the chronic stage of stroke participated in this pilot study. The EMG-controlled assistive exercise lasts for two weeks, 20 min per day and 5 days a week. The active range of motion in both abduction and flexion increases significantly after the intervention (p shoulder-related items (p shoulder-unrelated items of the upper extremity (p = 0.13) nor in the lower extremity items (p = 0.19). This pilot study demonstrates that EMG-controlled assistive exercise can improve shoulder motor functions related to selected muscles and the suggested method is promising for the motor recovery of the shoulder in chronic hemiplegia. PMID:26406084

  4. A type IV P-type ATPase affects insulin-mediated glucose uptake in adipose tissue and skeletal muscle in mice.

    Science.gov (United States)

    Dhar, Madhu S; Yuan, Joshua S; Elliott, Sarah B; Sommardahl, Carla

    2006-12-01

    Mice carrying two pink-eyed dilution (p) locus heterozygous deletions represent a novel polygenic mouse model of type 2 diabetes associated with obesity. Atp10c, a putative aminophospholipid transporter on mouse chromosome 7, is a candidate for the phenotype. The phenotype is diet-induced. As a next logical step in the validation and characterization of the model, experiments to analyze metabolic abnormalities associated with these mice were carried out. Results demonstrate that mutants (inheriting the p deletion maternally) heterozygous for Atp10c are hyperinsulinemic, insulin-resistant and have an altered insulin-stimulated response in peripheral tissues. Adipose tissue and the skeletal muscle are the targets, and GLUT4-mediated glucose uptake is the specific metabolic pathway associated with Atp10c deletion. Insulin resistance primarily affects the adipose tissue and the skeletal muscle, and the effect in the liver is secondary. Gene expression profiling using microarray and real-time PCR show significant changes in the expression of four genes--Vamp2, Dok1, Glut4 and Mapk14--involved in insulin signaling. The expression of Atp10c is also significantly altered in the adipose tissue and the soleus muscle. The most striking observation is the loss of Atp10c expression in the mutants, specifically in the soleus muscle, after eating the high-fat diet for 12 weeks. In conclusion, experiments suggest that the target genes and/or their cognate factors in conjunction with Atp10c presumably affect the normal translocation and sequestration of GLUT4 in both the target tissues. PMID:16517145

  5. [Classification of periprosthetic shoulder fractures].

    Science.gov (United States)

    Kirchhoff, C; Kirchhoff, S; Biberthaler, P

    2016-04-01

    The key targets in the treatment of periprosthetic humeral fractures (PHF) are the preservation of bone, successful bony consolidation and provision of a stable anchoring of the prosthesis with the major goal of restoring the shoulder-arm function. A substantial problem of periprosthetic shoulder fractures is the fact that treatment is determined not only by the fracture itself but also by the implanted prosthesis and its function. Consequently, the exact preoperative shoulder function and, in the case of an implanted anatomical prosthesis, the status and function of the rotator cuff need to be assessed in order to clarify the possibility of a secondarily occurring malfunction. Of equal importance in this context is the type of implanted prosthesis. The existing classification systems of Wright and Cofield, Campbell et al., Groh et al. and Worland et al. have several drawbacks from a shoulder surgeon's point of view, such as a missing reference to the great variability of the available prostheses and the lack of an evaluation of rotator cuff function. The presented 6‑stage classification for the evaluation of periprosthetic fractures of the shoulder can be considered just as simple or complex to understand as the classification of the working group for osteosynthesis problems (AO, Arbeitsgemeinschaft für Osteosynthesefragen), depending on the viewpoint. From our point of view the classification presented here encompasses the essential points of the existing classification systems and also covers the otherwise missing points, which should be considered in the assessment of such periprosthetic fractures. The classification presented here should provide helpful assistance in the daily routine to find the most convenient form of therapy. PMID:26992712

  6. Management of the frozen shoulder

    Directory of Open Access Journals (Sweden)

    van de Laar SM

    2014-10-01

    Full Text Available Suzanne Margaretha van de Laar, Peer van der Zwaal Department of Orthopaedic Surgery and Trauma, Medical Center Haaglanden, The Hague, the Netherlands Abstract: Frozen shoulder is a very common condition with a prevalence of 2%–5% in the general population. Decrease in joint volume as a result of fibrosis and hyperplasia of the joint capsule leads to painful and restricted glenohumeral motion. Frozen shoulder is a self-limiting disease with a chronic character, and is mostly treated in a primary care setting. In this review, we set out to address the current evidence-based literature on management of this disabling disease using a PubMed search. Many non-surgical and surgical therapeutic options are described, including supervised neglect, intra-articular corticosteroid injections, physical therapy, manipulation under anesthesia, capsular distension, and arthroscopic capsular release. In the literature, the long-term outcome shows a significant decrease in pain and improvement of shoulder function for all treatment modalities without clear evidence of superiority of one over the other. This possibly indicates that a self-limiting character is the most important factor in the course of the disease. Management of frozen shoulder is primarily conservative. Supervised neglect is combined with analgesia and stretching exercises as the pain subsides. In the early painful phase, intra-articular corticosteroid injections are recommended for pain relief. When the patient has persistent pain and glenohumeral stiffness after adequate conservative treatment, invasive options can be considered, like arthroscopic capsular release, manipulation under anesthesia, or capsular distension. Keywords: frozen shoulder, adhesive capsulitis, treatment, pathophysiology

  7. DASH (disabilities of the arm, shoulder, and hand) evaluation of QOL for carpal tunnel syndrome

    International Nuclear Information System (INIS)

    The questionnaire on the disabilities of the arm, shoulder, and hand is a region-specific, self-administered outcome instrument that is developed as a measure of self-rate upper extremity disability and symptoms. Last year, the Japanese version of disabilities of the arm, shoulder and hand (DASH) was cross-culturally adapted. The main purpose of this study is to analyze the relationship between DASH and clinical assessment (findings of MRI and electrodiagnostic parameters). The subjects comprised 41 patients (6 males and 35 females) with carpal tunnel syndrome (CTS), except for cases with other upper extremity disorders. These subjects prospectively completed DASH 1 (disability module), DASH 2 (symptom module), and DASH (disability and symptom module) before the release of the open carpal tunnel. The patients were divided into 3 groups based on the symptom duration (A: shorter than 3 months, B: 4-11 months, C: longer than 12 months). All patients were preoperatively assessed with regard to sensory conduction velocity (SCV) and compound muscle action potential (CMAP). In addition, all patients underwent MRI in order to evaluate the flexor tenosynovial swelling represented by palmar bowing of the flexor retinaculum (PBFR). The relationships were estimated using the Spearman rank score, unpaired t tests, and Bonferroni tests. DASH 2 scores indicated greater responsiveness than DASH 1, which reflected the character of CTS. DASH 1 scores were higher in patients who were affected in their dominant hand than in those whose nondominant hand was affected. The DASH scores decreased significantly in groups A and B, with the exception of C. However, DASH did not show any correlation either with the parameters, age, or MRI assessment. DASH can be used for the research of preoperative outcomes related to CTS. It also has the advantage of being useful in assessing and comparing the outcome for various other hand disorders. (author)

  8. Relationship between the shortening of the posterior muscle chain and the forward shift of the head and shoulder in female athletes from the youth category Relação entre o encurtamento de cadeia muscular posterior e a anteriorização da cabeça e ombros em atletas infanto-juvenis do gênero feminino

    Directory of Open Access Journals (Sweden)

    Lucas Maciel Rabello

    2010-10-01

    Full Text Available The aim of the present study was to analyze the relationship between the shortening of the posterior muscle chain, mainly the hamstrings and the forward shift of the head and shoulder, as a possible adaptation in high level/performance athletes. The sample involved 59 female athletes from the youth category of different sports modalities. Group 1: 35 athletes with significant hamstrings’ shortening evaluated by the “bear’s position”; Control group: 24 athletes without hamstrings’ shortening, evaluated by the same position. Data collection was performed using digital analysis of pictures taken with the athlete standing (lateral vision in the “bear’s position”. Luminous markers were placed in the temporomandibular joint, lateral region of the acromio, femur great trochanter, external femoral condyle and lateral malleolus. Variables were measured by the computerized angular cinematic analysis, using the software for posture evaluation SAPO, 0.68 version, always performed by the same rater. Statistical analysis was performed with the Shapiro Wilk test, Unpaired t test and Pearson’s correlation coefficient. The level of significance was set at p?0.05. Group 1 showed 2.5 degrees (SD=1,12 of forward inclination in the lateral view and 43.15 degrees (SD=9,41 of knee flexion in the “bear’s position”. In group 2, there was 2.77 (DP=1.02 degrees in the lateral analysis and -2.19 (DP=4.05 degrees in the “bear’s position”. The statistical analysis between the two groups showed p=0.50 for the comparison of the anterior trunk imbalance in the lateral view and p=0,00 for the comparison of the “bear’s position”. The correlation analysis between the anterior trunk imbalance and the posterior muscle chain shortening, emphasizing the hamstrings, showed r=0.04 in the group with posterior chain shortening and r=0.1 in the control group. It can be concluded that the hamstrings’ muscle shortening did not show any relation with the

  9. High Physiological Omega-3 Fatty Acid Supplementation Affects Muscle Fatty Acid Composition and Glucose and Insulin Homeostasis in Obese Adolescents

    OpenAIRE

    Frida Dangardt; Yun Chen; Eva Gronowitz; Jovanna Dahlgren; Peter Friberg; Birgitta Strandvik

    2012-01-01

    Obese adolescents have high concentrations of saturated fatty acids and low omega-3 long-chain polyunsaturated fatty acids (LCUFAs) in plasma phospholipids. We aimed to investigate effects of omega-3 LCPUFA supplementation to obese adolescents on skeletal muscle lipids and glucose and insulin homeostasis. Twenty-five obese adolescents (14–17 years old, 14 females) completed a randomized double-blind crossover study supplying capsules containing either 1.2 g omega-3 LCPUFAs or placebo, for 3 m...

  10. The Genomic Context and Corecruitment of SP1 Affect ERRα Coactivation by PGC-1α in Muscle Cells.

    Science.gov (United States)

    Salatino, Silvia; Kupr, Barbara; Baresic, Mario; van Nimwegen, Erik; Handschin, Christoph

    2016-07-01

    The peroxisome proliferator-activated receptor-γ coactivator 1α (PGC-1α) coordinates the transcriptional network response to promote an improved endurance capacity in skeletal muscle, eg, by coactivating the estrogen-related receptor-α (ERRα) in the regulation of oxidative substrate metabolism. Despite a close functional relationship, the interaction between these 2 proteins has not been studied on a genomic level. We now mapped the genome-wide binding of ERRα to DNA in a skeletal muscle cell line with elevated PGC-1α and linked the DNA recruitment to global PGC-1α target gene regulation. We found that, surprisingly, ERRα coactivation by PGC-1α is only observed in the minority of all PGC-1α recruitment sites. Nevertheless, a majority of PGC-1α target gene expression is dependent on ERRα. Intriguingly, the interaction between these 2 proteins is controlled by the genomic context of response elements, in particular the relative GC and CpG content, monomeric and dimeric repeat-binding site configuration for ERRα, and adjacent recruitment of the transcription factor specificity protein 1. These findings thus not only reveal a novel insight into the regulatory network underlying muscle cell plasticity but also strongly link the genomic context of DNA-response elements to control transcription factor-coregulator interactions. PMID:27182621

  11. How well do the muscular synergies extracted via non-negative matrix factorisation explain the variation of torque at shoulder joint?

    Science.gov (United States)

    Moghadam, M Nassajian; Aminian, K; Asghari, M; Parnianpour, M

    2013-01-01

    The way central nervous system manages the excess degrees of freedom to solve kinetic redundancy of musculoskeletal system remains an open question. In this study, we utilise the concept of synergy formation as a simplifying control strategy to find the muscle recruitment based on summation of identified muscle synergies to balance the biomechanical demands (biaxial external torque) during an isometric shoulder task. A numerical optimisation-based shoulder model was used to obtain muscle activation levels when a biaxial external isometric torque is imposed at the shoulder glenohumeral joint. In the numerical simulations, 12 different shoulder torque vectors in the transverse plane are considered. For each selected direction for the torque vector, the resulting muscle activation data are calculated. The predicted muscle activation data are used for grouping muscles in some fixed element synergies by the non-negative matrix factorisation method. Next, torque produced by these synergies are computed and projected in the 2D torque space to investigate the magnitude and direction of torques that each muscle synergy generated. The results confirmed our expectation that few dominant synergies are sufficient to reconstruct the torque vectors and each muscle contributed to more than one synergy. Decomposition of the concatenated data, combining the activation and external torque, provided functional muscle synergies that produced torques in the four principal directions. Four muscle synergies were able to account for more than 95% of variation of the original data. PMID:21970618

  12. Glenohumeral joint muscles strength of the young tennis players

    Directory of Open Access Journals (Sweden)

    LEONĪDS ČUPRIKS

    2012-03-01

    Full Text Available This paper consists from two parts. First is small theoretic review about shoulder and upper arm kinematics, biodynamics in forehand and serve strokes. Second is dedicated to study young tennis players’ glenohumeral joint muscles strength peak torque, analyzing an asymmetry level of dominant and nondominant side. Five 11 years old girls, weight 42.6 kg (± 5.1, height 157,8 cm (± 5,8 have participated in study. Tests performed with use of Technogym’s isokinetic device REV-9000. Mode of the testing – isometric muscle contraction. Verbal and visual feedbacks were utilized to increase the motivation of the subjects. Based on the results of this testing we created individual shoulder joint muscular strength models, that reflects peak torque of right and left shoulder flexion and extension, shoulder abduction and adduction, shoulder internal and external rotation.

  13. A muscle stem cell for every muscle: variability of satellite cell biology among different muscle groups

    Directory of Open Access Journals (Sweden)

    Matthew Emerson Randolph

    2015-10-01

    Full Text Available The human body contains approximately 640 individual skeletal muscles. Despite the fact that all of these muscles are composed of striated muscle tissue, the biology of these muscles and their associated muscle stem cell populations are quite diverse. Skeletal muscles are affected differentially by various muscular dystrophies, such that certain genetic mutations specifically alter muscle function in only a subset of muscles. Additionally, defective muscle stem cells have been implicated in the pathology of some muscular dystrophies. The biology of muscle stem cells varies depending on their embryologic origins and the muscles with which they are associated. Here we review the biology of skeletal muscle stem cell populations of eight different muscle groups. Understanding the biological variation of skeletal muscles and their resident stem cells could provide valuable insight into mechanisms underlying the susceptibility of certain muscles to myopathic disease.

  14. Shoulder impingement syndrome: MR findings in 53 shoulders

    OpenAIRE

    Seeger, LL; Gold, RH; Bassett, LW; Ellman, H

    1988-01-01

    The shoulder impingement syndrome refers to a condition in which the supraspinatus tendon and subacromial bursa are chronically entrapped between the humeral head inferiorly and either the anterior acromion itself, spurs of the anterior acromion or acromioclavicular joint, or the coracoacromial ligament superiorly. As a result, the space for the bursa and tendon is reduced, and repeated trauma to these structures leads to burstitis and rotator cuff injury. Although pain and limitation of moti...

  15. Highly efficient EIAV-mediated in utero gene transfer and expression in the major muscle groups affected by Duchenne muscular dystrophy.

    Science.gov (United States)

    Gregory, L G; Waddington, S N; Holder, M V; Mitrophanous, K A; Buckley, S M K; Mosley, K L; Bigger, B W; Ellard, F M; Walmsley, L E; Lawrence, L; Al-Allaf, F; Kingsman, S; Coutelle, C; Themis, M

    2004-07-01

    Gene therapy for Duchenne muscular dystrophy has so far not been successful because of the difficulty in achieving efficient and permanent gene transfer to the large number of affected muscles and the development of immune reactions against vector and transgenic protein. In addition, the prenatal onset of disease complicates postnatal gene therapy. We have therefore proposed a fetal approach to overcome these barriers. We have applied beta-galactosidase expressing equine infectious anaemia virus (EIAV) lentiviruses pseudotyped with VSV-G by single or combined injection via different routes to the MF1 mouse fetus on day 15 of gestation and describe substantial gene delivery to the musculature. Highly efficient gene transfer to skeletal muscles, including the diaphragm and intercostal muscles, as well as to cardiac myocytes was observed and gene expression persisted for at least 15 months after administration of this integrating vector. These findings support the concept of in utero gene delivery for therapeutic and long-term prevention/correction of muscular dystrophies and pave the way for a future application in the clinic. PMID:15141156

  16. Simultaneous bilateral anterior shoulder dislocation: report of two cases and review of the literature

    Institute of Scientific and Technical Information of China (English)

    Sujit Kumar Tripathy; Ramesh Kumar Sen; Sameer Aggarwal; Sarvdeep Singh Dhatt; Naveen Tahasildar

    2011-01-01

    Bilateral shoulder dislocations are rare and almost always occur in the posterior direction. Simultaneous bilateral anterior shoulder dislocation is even rarer and only a few cases are stated in the literature. The most interesting part of a bilateral shoulder dislocation is about its injury mechanism as a synchronous and simultaneous force is needed to result in it. In cases of epilepsy or electrocution, the mechanism is different and the forceful contractions of the selective group of muscles result in the dislocation. This article reports two cases of bilateral simultaneous anterior shoulder joint dislocation that occurred after a road side accident and after an episode of convulsion in an epileptic patient. The dislocations were diagnosed early and reduced immediately with a proper postreduction rehabilitation. During their follow-up, both patients had satisfactory functional outcome. This article emphasizes on the importance of shoulder examination in road side accident victims and epileptic patients. All orthopedic surgeons and emergency physicians should be aware of such unusual possibilities to have an early diagnosis and treatment.An early reduction and appropriate rehabilitation can provide satisfactory functional outcome. This article also briefly discusses the injury mechanisms, diagnoses and treatments of bilateral shoulder dislocation as reported in the literature.

  17. A multi-modal treatment approach for the shoulder: A 4 patient case series

    Directory of Open Access Journals (Sweden)

    Pollard Henry

    2005-09-01

    Full Text Available Abstract Background This paper describes the clinical management of four cases of shoulder impingement syndrome using a conservative multimodal treatment approach. Clinical Features Four patients presented to a chiropractic clinic with chronic shoulder pain, tenderness in the shoulder region and a limited range of motion with pain and catching. After physical and orthopaedic examination a clinical diagnosis of shoulder impingement syndrome was reached. The four patients were admitted to a multi-modal treatment protocol including soft tissue therapy (ischaemic pressure and cross-friction massage, 7 minutes of phonophoresis (driving of medication into tissue with ultrasound with 1% cortisone cream, diversified spinal and peripheral joint manipulation and rotator cuff and shoulder girdle muscle exercises. The outcome measures for the study were subjective/objective visual analogue pain scales (VAS, range of motion (goniometer and return to normal daily, work and sporting activities. All four subjects at the end of the treatment protocol were symptom free with all outcome measures being normal. At 1 month follow up all patients continued to be symptom free with full range of motion and complete return to normal daily activities. Conclusion This case series demonstrates the potential benefit of a multimodal chiropractic protocol in resolving symptoms associated with a suspected clinical diagnosis of shoulder impingement syndrome.

  18. Normal shoulder muscular activation and co-ordination during a shoulder elevation task based on activities of daily living: an electromyographic study.

    Science.gov (United States)

    Hawkes, David H; Alizadehkhaiyat, Omid; Fisher, Anthony C; Kemp, Graham J; Roebuck, Margaret M; Frostick, Simon P

    2012-01-01

    Studies of normal shoulder function have often failed to consider the inter-relationship between different muscle groups in activities relevant to daily life. Upper limb functional status was assessed in 12 healthy male volunteers using the Functional Impairment Test-Hand, Neck, Shoulder and Arm test (FIT-HaNSA). Electromyography was then used to study the activity and coordination of 13 muscles (10 by surface electrodes, 3 by fine-wire intramuscular electrodes) around the shoulder during a dynamic movement task based on the shelf-lifting task in FIT-HaNSA. Muscles were grouped for analysis into deltoid (anterior, middle, and posterior divisions), adductors (latissimus dorsi and teres major), rotator cuff (supraspinatus, infraspinatus, and subscapularis), and elbow flexor (brachioradialis, biceps brachii) groups. There were no significant inter-session effects. Using cross-correlation analysis to investigate the whole time-course of activation, there were highly significant positive correlations (p elbow flexor groups (p = 0.031). We conclude that the deltoid, adductor, and rotator cuff muscles all contribute to the muscular component of glenohumeral joint stability. Muscular stability can be adapted as required to meet task-specific demands. PMID:21674607

  19. Raptor ablation in skeletal muscle decreases Cav1.1 expression and affects the function of the excitation–contraction coupling supramolecular complex

    Science.gov (United States)

    Lopez, Rubén J.; Mosca, Barbara; Treves, Susan; Maj, Marcin; Bergamelli, Leda; Calderon, Juan C.; Bentzinger, C. Florian; Romanino, Klaas; Hall, Michael N.; Rüegg, Markus A.; Delbono, Osvaldo; Caputo, Carlo; Zorzato, Francesco

    2016-01-01

    The protein mammalian target of rapamycin (mTOR) is a serine/threonine kinase regulating a number of biochemical pathways controlling cell growth. mTOR exists in two complexes termed mTORC1 and mTORC2. Regulatory associated protein of mTOR (raptor) is associated with mTORC1 and is essential for its function. Ablation of raptor in skeletal muscle results in several phenotypic changes including decreased life expectancy, increased glycogen deposits and alterations of the twitch kinetics of slow fibres. In the present paper, we show that in muscle-specific raptor knockout (RamKO), the bulk of glycogen phosphorylase (GP) is mainly associated in its cAMP-non-stimulated form with sarcoplasmic reticulum (SR) membranes. In addition, 3[H]–ryanodine and 3[H]–PN200-110 equilibrium binding show a ryanodine to dihydropyridine receptors (DHPRs) ratio of 0.79 and 1.35 for wild-type (WT) and raptor KO skeletal muscle membranes respectively. Peak amplitude and time to peak of the global calcium transients evoked by supramaximal field stimulation were not different between WT and raptor KO. However, the increase in the voltage sensor-uncoupled RyRs leads to an increase of both frequency and mass of elementary calcium release events (ECRE) induced by hyper-osmotic shock in flexor digitorum brevis (FDB) fibres from raptor KO. The present study shows that the protein composition and function of the molecular machinery involved in skeletal muscle excitation–contraction (E–C) coupling is affected by mTORC1 signalling. PMID:25431931

  20. Conditional deletion of the relaxin receptor gene in cells of smooth muscle lineage affects lower reproductive tract in pregnant mice.

    Science.gov (United States)

    Kaftanovskaya, Elena M; Huang, Zaohua; Lopez, Carolina; Conrad, Kirk; Agoulnik, Alexander I

    2015-04-01

    Relaxin hormone secreted into the circulation during pregnancy was discovered through its effects on pubic symphysis relaxation and parturition. Genetic inactivation of the relaxin gene or its cognate relaxin family peptide receptor 1 (RXFP1) in mice caused failure of parturition and mammary nipple enlargement, as well as increased collagen fiber density in the cervix and vagina. However, the relaxin effect on discrete cells and tissues has yet to be determined. Using transgenic mice with a knockin LacZ reporter in the Rxfp1 allele, we showed strong expression of this gene in vaginal and cervical stromal cells, as well as pubic ligament cells. We produced a floxed Rxfp1 allele that was used in combination with the Tagln-cre transgene to generate mice with a smooth muscle-specific gene knockout. In pregnant females, the ROSA26 reporter activated by Tagln-cre was detected in smooth muscle cells of the cervix, vagina, uterine artery, and in cells of the pubic symphysis. In late pregnant females with conditional gene ablation, the length of pubic symphysis was significantly reduced compared with wild-type or heterozygous Rxfp1(+/-) females. Denser collagen content was revealed by Masson trichrome staining in reproductive tract organs, uterine artery, and pubic symphysis. The cervical and vaginal epithelium was less developed than in heterozygous or wild-type females, although nipple size was normal and the dams were able to nurse their pups. In summary, our data indicate that relaxin/RXFP1 signaling in smooth muscle cells is important for normal collagen turnover and relaxation of the pubic symphysis during pregnancy. PMID:25715795

  1. Comparative diagnostic imaging of the canine shoulder joint: ultrasonography and radiography

    International Nuclear Information System (INIS)

    Ultrasonography of shoulder joint disease has been applied in humans for some time. In this study, the use of radiography and ultrasonography as diagnostic imaging modalities to determine shoulder joint lesions is presented. The ultrasonographic anatomy and pathology of the shoulder joint are described. Comparative radiographic and ultrasonographic findings in 67 dogs with front limb lameness and/or radiographically visible shoulder joint lesions are presented. Shoulder joint lesions include insertion tendinopathies of the supra- and infraspinatus muscles, distension of the subtendinous bursa of the infraspinatus muscle, bicipital tendinopathies, such as tendovaginitis, calcifications, partial and complete rupture, and avulsion fractures at the supraglenoid tubercle, osteochondritis dissecans, degenerative joint disease, bony proliferations in the intertuberal groove, and neoplasia of bones and soft-tissues. Ultrasonographic diagnosis of tendon abnormalities and other soft tissue lesions is a necessary supplemental examination to radiographs, which should always be the basis for orthopedic diagnostic imaging. When using both imaging techniques, the exact location of radio-opaque mineralizations can be determined and a more accurate diagnosis made. The ultrasonographic appearance of an infraspinatus muscle insertion tendinopathy in conjunction with distension of the subtendinous bursa is reported for the first time. Low-density calcifications are not visible radiographically. 6 of 17 supraspinatus insertion tendinopathies (35.3 %) and 4 of 5 bicipital tendon calcifications (80 %) were detected only with ultrasonography. Radiographic findings of bony proliferations in the intertuberal groove without signs of degenerative joint disease of the shoulder joint are indicative of severe or chronic biciptal tendon disease. In many cases, the stage and severity of cartilaginous and subchondral bone lesions with osteochondritis dissecans can be determined ultrasonographically

  2. Multiple brain parenchymal neurocysticercosis with extraocular muscle cysticercosis affecting levator palpebral superioris and superior rectus complex: an unusual association

    OpenAIRE

    Verma, Rajesh; Jaiswal, Anupam

    2013-01-01

    An 8-year-old girl presented to the neurology department with a complaint of insidious onset of left-sided ptosis and restricted elevation of the left eye. A CT scan orbit and brain revealed a ring-enhancing lesion in the levator palpebral superioris (LPS) and superior rectus (SR) muscle complex of the left eye and left parietal and right temporal region. She was started on steroid, followed by albendazole with improvement. The LPS/SR complex is the least common site of involvement among extr...

  3. Impingement syndrome of the shoulder

    International Nuclear Information System (INIS)

    The impingement syndrome is a clinical entity characterized by shoulder pain due to primary or secondary mechanical irritation of the rotator cuff. The primary factors for the development of impingement are a curved or hook-shaped anterior acromion as well as subacromial osteophytes, which may lead to tearing of the supraspinatus tendon. Secondary impingement is mainly caused by calcific tendinopathy, glenohumeral instability, os acromiale and degenerative changes of the acromioclavicular joint. Conventional radiographs are initially obtained, mainly for evaluation of the bony structures of the shoulder. If available, sonography can be used for detection of lesions and tears of the rotator cuff. Finally, MR-imaging provides detailed information about the relationship of the acromion and the acromioclavicular joint to the rotator cuff itself. In many cases however, no morphologic cause for impingement syndrome can be found. While patients are initially treated conservatively, chronic disease usually requires surgical intervention. (orig.)

  4. Imaging of muscle injuries

    Energy Technology Data Exchange (ETDEWEB)

    El-Khoury, G.Y. [Iowa Univ., Iowa City, IA (United States). Dept. of Radiology; Brandser, E.A. [Iowa Univ., Iowa City, IA (United States). Dept. of Radiology; Kathol, M.H. [Iowa Univ., Iowa City, IA (United States). Dept. of Radiology; Tearse, D.S. [Iowa Univ., Iowa City, IA (United States). Dept. of Orthopaedic Surgery; Callaghan, J.J. [Iowa Univ., Iowa City, IA (United States). Dept. of Orthopaedic Surgery

    1996-01-01

    Although skeletal muscle is the single largest tissue in the body, there is little written about it in the radiologic literature. Indirect muscle injuries, also called strains or tears, are common in athletics, and knowing the morphology and physiology of the muscle-tendon unit is the key to the understanding of these injuries. Eccentric muscle activation produces more tension within the muscle tan when it is activated concentrically, making it more susceptible to tearing. Injuries involving the muscle belly tend to occur near the myotendinous junction. In adolescents, the weakest link in the muscle-tendon-bone complex is the apophysis. Traditionally, plain radiography has been the main diagnostic modality for evaluation of these injuries; however, with the advent of MRI it has become much easier to diagnose injuries primarily affecting the soft tissues. This article reviews the anatomy and physiology of the muscle-tendon unit as they relate to indirect muscle injuries. Examples of common muscle injuries are illustrated. (orig.)

  5. Imaging of muscle injuries

    International Nuclear Information System (INIS)

    Although skeletal muscle is the single largest tissue in the body, there is little written about it in the radiologic literature. Indirect muscle injuries, also called strains or tears, are common in athletics, and knowing the morphology and physiology of the muscle-tendon unit is the key to the understanding of these injuries. Eccentric muscle activation produces more tension within the muscle tan when it is activated concentrically, making it more susceptible to tearing. Injuries involving the muscle belly tend to occur near the myotendinous junction. In adolescents, the weakest link in the muscle-tendon-bone complex is the apophysis. Traditionally, plain radiography has been the main diagnostic modality for evaluation of these injuries; however, with the advent of MRI it has become much easier to diagnose injuries primarily affecting the soft tissues. This article reviews the anatomy and physiology of the muscle-tendon unit as they relate to indirect muscle injuries. Examples of common muscle injuries are illustrated. (orig.)

  6. Shoulder dislocation in patients older than 60 years of age

    Directory of Open Access Journals (Sweden)

    Rapariz Jose

    2010-01-01

    Full Text Available Purpose: Recurrent anterior shoulder dislocation in elderly patients is a little studied condition. The goal of this paper is to clarify the role of associated injuries with respect to loss of function and recurrence of dislocation. Materials and Methods: We have conducted a retrospective, descriptive study on 29 patients older than 60 years at the moment they suffered their first dislocation episode. All patients were assessed clinically (Constant test and by imaging testing (X-ray, MRI. Results: Nine (31.03% out of 29 patients had a recurrent dislocation. Four of them required reconstructive surgery to maintain joint stability. Injury to the anterior support (anterior labrum, anterior glenoid rim showed a statistically significant relation to the recurrence of dislocations. The occurrence or non-occurrence of a rotator cuff tear does have an impact on the shoulder function. The degree of rotator cuff involvement on the coronal plane does not significantly affect the shoulder′s functional outcome. The tear extension on the sagittal plane does cause impairment on the Constant test. Conclusions: Labrum and/or anterior glenoid involvement should be suspected in elderly patients presenting with recurrent shoulder dislocation. Recurrence is due to an injury in the anterior support or both (anterior and posterior, even though shoulder function gets impaired when a rotation cuff tear occurs with anterior extension on the sagittal plane. Evidence level: IV Case series.

  7. Diagnosis of shoulder impingement syndrome

    International Nuclear Information System (INIS)

    This article reviews the pathogenesis and clinical and imaging findings in shoulder impingement syndrome. Different stages of impingement syndrome are described. Stage I relates to edema and hemorrhage of the supraspinatus tendon. Stage II is characterized by bursal inflammation and fibrosis, as well as tendinopathy. In stage III there is a tear of the rotator cuff. Clinical signs many overlap. Moreover, calcifying tendinitis, fractures and pain originating from the cervical spine may mimic shoulder impingement syndrome. Imaging is important for the exact diagnosis. Standard radiographs are the basis of imaging in shoulder impingement syndrome. They may demonstrate subchondral sclerosis of the major tuberosity, subacromial spurs, and form anomalies of the acromion. They are also important in the differential diagnosis of shoulder impingement syndrome and demonstrate calcifying tendinitis, fractures and neoplasm. Ultrasonography has found acceptance as a screening tool and even as a final diagnostic method by many authors. However, there is a high interobserver variability in the demonstration of rotator cuff tears. Its usefulness has therefore been questioned. MR imaging is probably the method of choice in the evaluation of the rotator cuff and surrounding structures. Several investigations have demonstrated that differentiation of early findings, such as tendinopathy versus partial tears, may be difficult with MR imaging. However, reproducibility for fullthickness tears appears to be higher than for sonography. Moreover, specificity appears to be superior to sonography. MR arthrography is not universally accepted. However, it allows for more exact differentiation of discrete findings and may be indicated in preoperative planning. Standard arthrography and CT have a limited role in the current assessment of the rotator cuff. (orig.)

  8. Dietary Methionine Affect Meat Qulity and Myostatin Gene Exon 1 Region Methylation in Skeletal Muscle Tissues of Broilers

    Institute of Scientific and Technical Information of China (English)

    LIU Guo-qing; ZONG Kai; ZHANG Li-li; CAO Shu-qing

    2010-01-01

    Dietary amino acids imbalance will result in stunted broiler performance and deteriorated meat quality,which are involved in various biochemical cycles in vivo.In this study,the effects of dietary methionine on meat quality and methylation of myostatin exon 1 were investigated.Drip loss of the broilers fed with diet of high methionine levels(0.2%)increased from(6.3±0.1)%(control group)to(10.1±1.0)%,and the muscle shearing force increased from(22.8±1.9)N(control group)to(26.3±2.3)N.Moreover,many CpG sites were found at the myostatin exon 1 region(nucleotides 2360-2540 bp).To further understand the regulation of broiler myostatin expression,the methylation status of broiler myostatin exon 1 and its mRNA expression were analyzed.At the myostatin exon 1 region where CG enriches(nucleotides 2360-2540 bp),the percentages of methylation were 46 and 84% in low Met and high Met content groups after 55-d feeding,respectively.In skeletal muscle tissues,the exon 1 hypermethylation status of myostatin gene was found to be negatively correlated with the gene expression.These results suggested that methylation of this gene is a dynamic process,which plays a dominant role in regulating gene expression for development of individuals.

  9. Skeletal muscle myofibrillar and sarcoplasmic protein synthesis rates are affected differently by altitude-induced hypoxia in native lowlanders

    DEFF Research Database (Denmark)

    Holm, Lars; Haslund, Mads Lyhne; Robach, Paul;

    2010-01-01

    and expired breath samples were collected hourly during the 4 hour trial and vastus lateralis muscle biopsies obtained at 1 and 4 hours after tracer priming in the overnight fasted state. Myofibrillar protein synthesis rate was doubled; 0.041±0.018 at sea-level to 0.080±0.018%·hr(-1) (p0.05). Trends...... to increments in whole body protein kinetics were seen: Degradation rate elevated from 2.51±0.21 at sea level to 2.73±0.13 µmol·kg(-1)·min(-1) (p¿=¿0.05) at high altitude and synthesis rate similar; 2.24±0.20 at sea level and 2.43±0.13 µmol·kg(-1)·min(-1) (p>0.05) at altitude. We conclude that whole body amino...... acid flux is increased due to an elevated protein turnover rate. Resting skeletal muscle myocontractile protein synthesis rate was concomitantly elevated by high-altitude induced hypoxia, whereas the sarcoplasmic protein synthesis rate was unaffected by hypoxia. These changed responses may lead...

  10. Skeletal muscle myofibrillar and sarcoplasmic protein synthesis rates are affected differently by altitude-induced hypoxia in native lowlanders

    DEFF Research Database (Denmark)

    Holm, Lars; Haslund, Mads Lyhne; Robach, Paul;

    2010-01-01

    and expired breath samples were collected hourly during the 4 hour trial and vastus lateralis muscle biopsies obtained at 1 and 4 hours after tracer priming in the overnight fasted state. Myofibrillar protein synthesis rate was doubled; 0.041±0.018 at sea-level to 0.080±0.018%⋅hr(-1) (p... acclimatized to high altitude. The sarcoplasmic protein synthesis rate was in contrast unaffected by altitude exposure; 0.052±0.019 at sea-level to 0.059±0.010%⋅hr(-1) (p>0.05). Trends to increments in whole body protein kinetics were seen: Degradation rate elevated from 2.51±0.21 at sea level to 2.......73±0.13 µmol⋅kg(-1)⋅min(-1) (p = 0.05) at high altitude and synthesis rate similar; 2.24±0.20 at sea level and 2.43±0.13 µmol⋅kg(-1)⋅min(-1) (p>0.05) at altitude. We conclude that whole body amino acid flux is increased due to an elevated protein turnover rate. Resting skeletal muscle myocontractile protein...

  11. Shoulder Electromyography Measurements During Activities of Daily Living and Routine Rehabilitation Exercises.

    Science.gov (United States)

    Gurney, A Burke; Mermier, Christine; LaPlante, Michael; Majumdar, Aditi; O'Neill, Kathleen; Shewman, Todd; Gurney, James G

    2016-05-01

    Study Design Controlled laboratory study. Background The activity of the rotator cuff muscles has not previously been measured with indwelling electromyography (EMG) comparing ambulation and other movements. Knowledge of the relative contribution of these muscles during various tasks may help to guide rehabilitation progression. Objective To measure activity of the rotator cuff muscles and other shoulder muscles during normal ambulation, shirt and sling donning and doffing, and rehabilitation tasks commonly performed after rotator cuff surgery. Methods In 28 volunteers (15 men, 13 women; mean age, 32.2 years), indwelling EMG activity was measured in the supraspinatus, infraspinatus, teres minor, and subscapularis muscles during various tasks; and surface EMG activity was measured in the middle deltoid, biceps, and upper trapezius muscles. Results Using median EMG activity, in general, donning and doffing a shirt or sling recruited the rotator cuff muscles more than the other 7 tasks tested. Self-ranging motion using pulleys, especially in the scapular plane, was also consistently associated with greater recruitment of the shoulder muscles. Pendulum exercises, passive range of motion by a physical therapist, and self-ranging motion with a dowel recruited the shoulder muscles to a lesser extent. Conclusion Our results demonstrate that rehabilitation tasks such as pendulum exercises, passive range of motion by a physical therapist, and self-ranging motion with a dowel show low EMG activity, whereas pulleys in the sagittal plane and scapular plane show greater activity. Scapular plane activity was consistently higher than sagittal plane activity. Of all the tasks assessed, ambulation without a sling and donning and doffing a sling and a shirt consistently showed the highest activity. J Orthop Sports Phys Ther 2016;46(5):375-383. Epub 6 Apr 2016. doi:10.2519/jospt.2016.6090. PMID:27049599

  12. Lessons learnt from the painful shoulder; a case series of malignant shoulder girdle tumours misdiagnosed as frozen shoulder

    OpenAIRE

    Quan, Gerald MY; Carr, Derek; Schlicht, Steven; Powell, Gerard; Choong, Peter FM

    2005-01-01

    Adhesive capsulitis or frozen shoulder is a common condition characterized by shoulder pain and stiffness. In patients in whom conservative measures have failed, more invasive interventions such as arthrographic or arthroscopic distension can be very effective in relieving symptoms and improving range of movement. However, absolute contraindications to these procedures include the presence of neoplasia around the shoulder girdle. We present five cases referred to our institution where the dia...

  13. The protein precursors of peptides that affect the mechanics of connective tissue and/or muscle in the echinoderm Apostichopus japonicus.

    Directory of Open Access Journals (Sweden)

    Maurice R Elphick

    Full Text Available Peptides that cause muscle relaxation or contraction or that modulate electrically-induced muscle contraction have been discovered in the sea cucumber Apostichopus japonicus (Phylum Echinodermata; Class Holothuroidea. By analysing transcriptome sequence data, here the protein precursors of six of these myoactive peptides (the SALMFamides Sticho-MFamide-1 and -2, NGIWYamide, stichopin, GN-19 and GLRFA have been identified, providing novel insights on neuropeptide and endocrine-type signalling systems in echinoderms. The A. japonicus SALMFamide precursor comprises eight putative neuropeptides including both L-type and F-type SALMFamides, which contrasts with previous findings from the sea urchin Strongylocentrotus purpuratus where L-type and F-type SALMFamides are encoded by different genes. The NGIWYamide precursor contains five copies of NGIWYamide but, unlike other NG peptide-type neuropeptide precursors in deuterostomian invertebrates, the NGIWYamide precursor does not have a C-terminal neurophysin domain, indicating loss of this character in holothurians. NGIWYamide was originally discovered as a muscle contractant, but it also causes stiffening of mutable connective tissue in the body wall of A. japonicus, whilst holokinins (PLGYMFR and derivative peptides cause softening of the body wall. However, the mechanisms by which these peptides affect the stiffness of body wall connective tissue are unknown. Interestingly, analysis of the A. japonicus transcriptome reveals that the only protein containing the holokinin sequence PLGYMFR is an alpha-5 type collagen. This suggests that proteolysis of collagen may generate peptides (holokinins that affect body wall stiffness in sea cucumbers, providing a novel perspective on mechanisms of mutable connective tissue in echinoderms.

  14. Somatotype variables related to muscle torque and power in judoists.

    Science.gov (United States)

    Lewandowska, Joanna; Buśko, Krzysztof; Pastuszak, Anna; Boguszewska, Katarzyna

    2011-12-01

    The purpose of this study was to examine the relationship between somatotype, muscle torque and power output in judoists. Thirteen judoists (age 18.4±3.1 years, body height 178.6±8.2 cm, body mass 82.3±15.9 kg) volunteered to participate in this study. Somatotype was determined using the Heath-Carter method. Maximal muscle torques of elbow, shoulder, knee, hip and trunk flexors as well as extensors were measured under static conditions. Power outputs were measured in 5 maximal cycle ergometer exercise bouts, 10 s each, at increasing external loads equal to 2.5, 5.0, 7.5, 10.0 and 12.5% of body weight. The Pearson's correlation coefficients were calculated between all parameters. The mean somatotype of judoists was: 3.5-5.9-1.8 (values for endomorphy, mesomorphy and ectomorphy, respectively). The values (mean±SD) of sum of muscle torque of ten muscle groups (TOTAL) was 3702.2±862.9 N x m. The power output ranged from 393.2±79.4 to 1077.2±275.4 W. The values of sum of muscle torque of right and left upper extremities (SUE), sum of muscle torque of right and left lower extremities (SLE), sum of muscle torque of the trunk (ST) and TOTAL were significantly correlated with the mesomorphic component (0.68, 0.80, 0.71 and 0.78, respectively). The ectomorphic component correlated significantly with values of SUE, SLE, ST and TOTAL (-0.69, -0.81, -0.71 and -0.79, respectively). Power output was also strongly correlated with both mesomorphy (positively) and ectomorphy (negatively). The results indicated that the values of mesomorphic and ectomorphic somatotype components influence muscle torque and power output, thus body build could be an important factor affecting results in judo. PMID:23487284

  15. Mechanical workload and neck and shoulder pain at the start of working life

    OpenAIRE

    2015-01-01

    Background: Musculoskeletal pain is prevalent both in adolescents and in the general working population. The neck and shoulder region is most commonly affected. Mechanical workload such as work in awkward postures, sustained work with hands above shoulder level, heavy lifting and repetitive work have previously been acknowledged as risk factors in adult working populations. The results have mainly been based on self-reported exposure data and the duration and intensity of the exposure is ofte...

  16. Perspectives on glenohumeral joint contractures and shoulder dysfunction in children with perinatal brachial plexus palsy.

    Science.gov (United States)

    Gharbaoui, Idris S; Gogola, Gloria R; Aaron, Dorit H; Kozin, Scott H

    2015-01-01

    Shoulder joint deformities continue to be a challenging aspect of treating upper plexus lesions in children with perinatal brachial plexus palsy (PBPP). It is increasingly recognized that PBPP affects the glenohumeral joint specifically, and that abnormal scapulothoracic movements are a compensatory development. The pathophysiology and assessment of glenohumeral joint contractures, the progression of scapular dyskinesia and skeletal dysplasia, and current shoulder imaging techniques are reviewed. PMID:25835253

  17. Strength of the Shoulder Rotators in Second-League Volleyball Players

    Directory of Open Access Journals (Sweden)

    Popieluch Aneta

    2015-12-01

    Full Text Available Introduction. The main aim of the study was to assess the strength of the shoulder rotator muscles of a group of second-league volleyball players. These muscles are assumed to have a crucial impact on attack effectiveness in volleyball. Strength was assessed based on peak torque values obtained for the rotator muscles measured using the maximal voluntary contraction (MVC method. Torque was measured in both limbs and the differences between the two limbs were examined. The torque values obtained for the volleyball players were also compared against those measured in a group of students who had never trained any sports.

  18. 肱骨近端严重骨折半肩关节置换术后护理与康复治疗%Nursing and rehabilitation after shoulder hemi-arthroplasty for severe proximal humeral fracture

    Institute of Scientific and Technical Information of China (English)

    孔祥燕

    2015-01-01

    ):After operation,according to the fracture type and fracture fixation condition of the patients,upon disappearance of anaesthesia, allow the elbow joint and distal limbs to perform active motion,mainly allow the shoulder joint to perform passive motion;Except for the training time,it is necessary to wear special sling for shoulder joint.This stage can be divided into 5 procedures:(1 )After disappearance of anaesthesia,start the active exercise on fingers,wrist joint and elbow joint,the passive motion of shoulder joint,and on the postoperative 7d,increase pendulum exercise;(2 )In the 2nd week post operation,the affected shoulder joint and adjacent joint perform rear traction without load as well as internal and external rotation motion;(3)In the 3rd week post operation,use healthy hand to protect the affected side to perform low load rear traction of both shoulder joints as well as chest extension exercise;(4)Iin the 4th week post operation, perform gravity-assisted pendulum exercise and anteflexion exercise, shoulder abduction,external rotation and uplifting function exercise;(5 ) In the 6th week post operation,after the healing of rotator cuff and big/small tubercles has been verified through X-ray examination,start active function exercise and increase functional training on supraspinous muscle and musculus deltoideus as well as wall-climbing exercise.At this stage,it is necessary to pay special attention to the training on the range of joint motion and muscle strength.Training on range of joint motion:(1 )Pendulum exercise:Allow the patient to bend down,so that trunk is parallel with ground,relax and hang the affected side upper limb,allow the upper limb and the trunk to present an angle of 90°, use heath side hand to support the affected side forearm to make clockwise or counterclockwise circle moment;with 10 circles as 1 group,respectively exercise for 1 group in the morning and at afternoon respectively.(2)Passive anteflexion and uplifting exercise on shoulder joint

  19. Nursing and rehabilitation after shoulder hemi-arthroplasty for severe proximal humeral fracture%肱骨近端严重骨折半肩关节置换术后护理与康复治疗

    Institute of Scientific and Technical Information of China (English)

    孔祥燕

    2015-01-01

    adjacent joint perform rear traction without load as well as internal and external rotation motion;(3)In the 3rd week post operation,use healthy hand to protect the affected side to perform low load rear traction of both shoulder joints as well as chest extension exercise;(4)Iin the 4th week post operation, perform gravity-assisted pendulum exercise and anteflexion exercise, shoulder abduction,external rotation and uplifting function exercise;(5 ) In the 6th week post operation,after the healing of rotator cuff and big/small tubercles has been verified through X-ray examination,start active function exercise and increase functional training on supraspinous muscle and musculus deltoideus as well as wall-climbing exercise.At this stage,it is necessary to pay special attention to the training on the range of joint motion and muscle strength.Training on range of joint motion:(1 )Pendulum exercise:Allow the patient to bend down,so that trunk is parallel with ground,relax and hang the affected side upper limb,allow the upper limb and the trunk to present an angle of 90°, use heath side hand to support the affected side forearm to make clockwise or counterclockwise circle moment;with 10 circles as 1 group,respectively exercise for 1 group in the morning and at afternoon respectively.(2)Passive anteflexion and uplifting exercise on shoulder joint:Remove pillow,allow the patient to lie on his/her back,allow the affected side arm to flex elbow by 90°and put arm on body side(rest position);The therapist use one hand to hold up the affected side upper arm and use another hand to hold the affected side forearm,make passive anteflexion and uplifting of shoulder joint in scapula plane (30 °-45 ° in front of coronal plane);If pain occurs or resistance is met when flexion motion has proceeded to a certain angle,stop movement for 5s,the gradually return to rest position;with repetition for 4 times as 1 group,respectively exercise for 1 group in the morning and at afternoon respectively

  20. Clinical Features Associated with Frozen Shoulder Syndrome in Parkinson’s Disease

    Directory of Open Access Journals (Sweden)

    Ya-Ting Chang

    2015-01-01

    Full Text Available Background. Frozen shoulder syndrome is a common musculoskeletal disease of idiopathic Parkinson’s disease (PD that causes long-term pain and physical disability. A better understanding of the associated factors can help identify PD patients who will require prevention to improve their quality of life. Methodology. This prospective study evaluated 60 shoulders of 30 PD patients. Correlation analysis was used to evaluate the relationships between clinical factors and shoulder sonography findings. Results. Frozen shoulder syndrome was found in 14 of 30 PD patients affecting 19 shoulders, including bilateral involvement in five and unilateral involvement in nine. There was a significant positive correlation between the parameters of sonography findings and frozen shoulder syndrome (i.e., thickness of bicipital effusion and tendon thickness of the subscapularis and supraspinatus and mean ipsilateral Unified Parkinson’s Disease Rating Scale (UPDRS III and its subscores (tremor, rigidity, and bradykinesia scores. Conclusions. Higher ipsilateral UPDRS and subscores are associated with increased effusion around the biceps tendon, with increased tendon thickness of subscapularis and supraspinatus. Preventing frozen shoulder syndrome in the high-risk PD group is an important safety issue and highly relevant for their quality of life.

  1. FROZEN SHOULDER TREATMENT: TRIAMCENALONE OR METHYLPREDNISOLONE INJECTION

    OpenAIRE

    Sanjib; Prabin Ch

    2015-01-01

    OBJECTIVE: To compare the effectiveness of Triamcinolone acetonide [40mg] and Methylprednisolone acetate [40mg] in 210 patients attending the Outpatient Department of Orthopedics of FAAMCH Barpeta with primary and secondary frozen shoulder. METHODS: A total number o f 210 patients with frozen shoulder who attended the Outpatient clinic of Orthopedics at FAAMCH from Jan 2013 to Jan 2015 were enrolled in our study. The diagnosis of frozen shoulder was made using...

  2. Rare Inferior Shoulder Dislocation (Luxatio Erecta)

    OpenAIRE

    Hakan Cift; Salih Soylemez; Murat Demiroglu; Korhan Ozkan; Vahit Emre Ozden; Ozkut, Afsar T.

    2015-01-01

    Although shoulder dislocations have been seen very frequently, inferior dislocation of shoulder constitutes only 0.5% of all shoulder dislocations. We share our 4 patients with luxatio erecta and present their last clinical control. 2 male and 2 female Caucasian patients were diagnosed as luxatio erecta. Patients’ ages were 78, 62, 65, and 76. All patients’ reduction was done by traction-abduction and contour traction maneuver in the operating room. The patients had no symptoms and no limitat...

  3. Gimballed Shoulders for Friction Stir Welding

    Science.gov (United States)

    Carter, Robert; Lawless, Kirby

    2008-01-01

    In a proposed improvement of tooling for friction stir welding, gimballed shoulders would supplant shoulders that, heretofore, have been fixedly aligned with pins. The proposal is especially relevant to self-reacting friction stir welding. Some definitions of terms, recapitulated from related prior NASA Tech Briefs articles, are prerequisite to a meaningful description of the proposed improvement. In friction stir welding, one uses a tool that includes (1) a rotating shoulder on top (or front) of the workpiece and (2) a pin that rotates with the shoulder and protrudes from the shoulder into the depth of the workpiece. In conventional friction stir welding, the main axial force exerted by the tool on the workpiece is reacted through a ridged backing anvil under (behind) the workpiece. When conventional friction stir welding is augmented with an auto-adjustable pin-tool (APT) capability, the depth of penetration of the pin into the workpiece is varied in real time by a position- or forcecontrol system that extends or retracts the pin as needed to obtain the desired effect. In self-reacting (also known as self-reacted) friction stir welding as practiced heretofore, there are two shoulders: one on top (or front) and one on the bottom (or back) of the workpiece. In this case, a threaded shaft protrudes from the tip of the pin to beyond the back surface of the workpiece. The back shoulder is held axially in place against tension by a nut on the threaded shaft. Both shoulders rotate with the pin and remain aligned coaxially with the pin. The main axial force exerted on the workpiece by the tool and front shoulder is reacted through the back shoulder and the threaded shaft into the friction-stir-welding machine head, so that a backing anvil is no longer needed. A key transmits torque between the bottom shoulder and the threaded shaft, so that the bottom shoulder rotates with the shaft. This concludes the prerequisite definitions of terms.

  4. Shoulder Injury Incidence Rates in NASA Astronauts

    Science.gov (United States)

    Laughlin, Mitzi S.; Murray, Jocelyn D.; Foy, Millennia; Wear, Mary L.; Van Baalen, Mary

    2014-01-01

    Evaluation of the astronaut shoulder injury rates began with an operational concern at the Neutral Buoyancy Laboratory (NBL) during Extravehicular Activity (EVA) training. An astronaut suffered a shoulder injury during an NBL training run and commented that it was possibly due to a hardware issue. During the subsequent investigation, questions arose regarding the rate of shoulder injuries in recent years and over the entire history of the astronaut corps.

  5. Posterior shoulder tightness and rotator cuff strength assessments in painful shoulders of amateur tennis players

    OpenAIRE

    Marcondes, Freddy B.; Julio F. Jesus; Flavio F. Bryk; Vasconcelos, Rodrigo A.; Thiago Y. Fukuda

    2013-01-01

    BACKGROUND: Previous studies have shown a relationship between shoulder posterior capsule tightness and shoulder pain in overhead athletes. However, this relationship has not been studied in tennis players. OBJECTIVES: Assessment of the shoulder range of motion (ROM), strength and posterior capsule tightness of skilled amateur tennis players who had complaints of dominant shoulder pain in comparison with tennis players without pain. METHOD: Forty-nine skilled amateur tennis players we...

  6. Reducing Shoulder by Vertical Traction: A One-Man Method for Shoulder Reduction

    OpenAIRE

    Hayat Ahmad Khan; Younis Kamal; Mohammad Ashraf Khan; Munir Farooq; Naseemul Gani; Nazia Hassan; Adil Bashir Shah; Mohammad Shahid Bhat

    2016-01-01

    Fifty percent of joint dislocations reported to the emergency department are of shoulder joint. Various techniques are used to reduce the shoulder and Spaso technique is the least known to the orthopaedic residents which is a simple one-man vertical traction method of shoulder reduction. We evaluated the effectiveness of vertical traction method for anterior shoulder dislocation by orthopaedic residents. Sixty consecutive patients of anterior glenohumeral dislocation attending the emergency d...

  7. Shoulder distention arthrography as a treatment modality

    International Nuclear Information System (INIS)

    18 patients with painful stiff shoulder joint were underwent shoulder distension arthrography as a treatment modality, followed by physical therapy. Range of motion of shoulder joint was evaluated at 1 week and 4 weeks after arthrography. The results were as follows; 1. Arthrographic findings were decreased volume of joint cavity, obliteration of axillary recess, small subscapularis bursa, serrated capsular margin and non-filling of biceps tendon sheath. In 3 cases, rotator cuff tear was found. 2. Range of motion of shoulder joint was improved after distension arthrography. 3. In 3 patients have rotator cuff tear, range of motion was not improved

  8. FROZEN SHOULDER TREATMENT: TRIAMCENALONE OR METHYLPREDNISOLONE INJECTION

    Directory of Open Access Journals (Sweden)

    Sanjib

    2015-10-01

    Full Text Available OBJECTIVE: To compare the effectiveness of Triamcinolone acetonide [40mg] and Methylprednisolone acetate [40mg] in 210 patients attending the Outpatient Department of Orthopedics of FAAMCH Barpeta with primary and secondary frozen shoulder. METHODS: A total number o f 210 patients with frozen shoulder who attended the Outpatient clinic of Orthopedics at FAAMCH from Jan 2013 to Jan 2015 were enrolled in our study. The diagnosis of frozen shoulder was made using the guidelines for shoulder complain issued by the Dutch C ollege of General Practitioners. Intra - articular injections of Triamcinolone acetonide [40mg] was used in 110 patients [ M ale - 50, female - 60] and 40mg Methylprednisolone was given to 100 patients [M ale - 35, female 65]. Injection was repeated every 3 weeks [ N o t more than 3 injections] by the posterior route. RESULTS: Triamcinolone acetonide was found to be more effective in diabetic patients with frozen shoulder in comparison to Methyprednisolone acetate. Triamcinolone acetonide was found to be more effective i n those patients presenting with severe grades of frozen shoulder and also these patients required lesser number of injections compared to Methylprednisolone acetate. However both Triamcinolone acatonide and Methyprednisolone were equally effective in prim ary frozen shoulder. CONCLUSION: We conclude that Triamcinolone acetonide and Methylprednisolone acetate are effective in the treatment of painful stiff shoulder; however injection Triamcinolone acetonide is a superior alternative in the treatment of diabe tics with frozen shoulder & resistant cases, with less number of injections.

  9. Magnetic resonance imaging of the shoulder

    International Nuclear Information System (INIS)

    The technique of the own method of shoulder examination was presented. Anatomy and the most common diseases of the shoulder are discussed. The diseases of the shoulder diagnosed on the basis of the MR are: rotator cuff disease, impingement syndrome and instability. MR findings occurred in these entities were demonstrated. The most common MR finding of the rotator cuff disease was higher signal intensity within the supraspinatus tendon, while in shoulder instability was labral abnormality. Impingement syndrome is the previous syndrome of the full MR imaging of the rotator cuff disease. (author)

  10. Anatomical basics, variations, and degenerative changes of the shoulder joint and shoulder girdle

    International Nuclear Information System (INIS)

    -lesions may occur and at the glenoid rim, where the labrum is often not fixed to the bony margin, avulsions of the labrum may occur. This well-established anatomical condition must not be mistaken for a manifest Bankart-lesion. The glenohumeral ligaments, which are located in the ventral articular capsule, have a stabilizing function for the ventral part of the glenoid labrum. The glenohumeral ligaments lift the articular lip where it crosses the glenoid notch. This 'labrum-lift effect' supports the stabilizing features of the articular lip and the glenohumeral ligaments. The rotator cuff is composed of the tendons of the teres minor, infraspinatus, supraspinatus, and subscapularis muscles. This cuff has a poorly vascularized area, due to mechanical conditions, about 1.5 cm from the major tubercle, which causes degenerative changes and eventually may lead to ruptures. Results of the impingement-syndrome and the osteoarthrotic changes of the shoulder and acromioclavicular joint are also presented and discussed. Finally, the coracoclavicular joint, which probably represents no congenital entity but appears due to a changed, lowered position of the shoulder girdle, is discussed. The paper also presents instructive figures of anatomical preparations that can be used to make more precise radiological and differential diagnoses. All preparations were done by the author and are part of a series of more than 300 preparations of the shoulder joint and girdle

  11. Risk of shoulder tendinitis in relation to shoulder loads in monotonous repetitive work

    DEFF Research Database (Denmark)

    Frost, P.; Bonde, J. P.; Mikkelsen, S.;

    2002-01-01

    BACKGROUND: Few studies relate the occurrence of shoulder disorders to quantified ergonomic exposures. This study evaluates the hypothesis that shoulder loads in repetitive work might contribute to the occurrence of shoulder tendinitis. METHODS: This is a cross-sectional study of 1961 workers in ...

  12. Treatment of myofascial trigger points in common shoulder disorders by physical therapy: A randomized controlled trial [ISRCTN75722066

    Directory of Open Access Journals (Sweden)

    Franssen Jo LM

    2007-11-01

    Full Text Available Abstract Background Shoulder disorders are a common health problem in western societies. Several treatment protocols have been developed for the clinical management of persons with shoulder pain. However available evidence does not support any protocol as being superior over others. Systematic reviews provide some evidence that certain physical therapy interventions (i.e. supervised exercises and mobilisation are effective in particular shoulder disorders (i.e. rotator cuff disorders, mixed shoulder disorders and adhesive capsulitis, but there is an ongoing need for high quality trials of physical therapy interventions. Usually, physical therapy consists of active exercises intended to strengthen the shoulder muscles as stabilizers of the glenohumeral joint or perform mobilisations to improve restricted mobility of the glenohumeral or adjacent joints (shoulder girdle. It is generally accepted that a-traumatic shoulder problems are the result of impingement of the subacromial structures, such as the bursa or rotator cuff tendons. Myofascial trigger points (MTrPs in shoulder muscles may also lead to a complex of symptoms that are often seen in patients diagnosed with subacromial impingement or rotator cuff tendinopathy. Little is known about the treatment of MTrPs in patients with shoulder disorders. The primary aim of this study is to investigate whether physical therapy modalities to inactivate MTrPs can reduce symptoms and improve shoulder function in daily activities in a population of chronic a-traumatic shoulder patients when compared to a wait-and-see strategy. In addition we investigate the recurrence rate during a one-year-follow-up period. Methods/Design This paper presents the design for a randomized controlled trial to be conducted between September 2007 – September 2008, evaluating the effectiveness of a physical therapy treatment for non-traumatic shoulder complaints. One hundred subjects are included in this study. All subjects

  13. Effect of scapular function training on chronic pain in the neck/shoulder region

    DEFF Research Database (Denmark)

    Andersen, Christoffer H; Andersen, Lars L; Zebis, Mette K;

    2014-01-01

    avoiding direct training of the painful area. Our study investigates the effect of the latter approach. The purpose of this study was in a randomised controlled trial to investigate if intensive scapular function training (SFT)-in terms of training of the lower trapezius and the serratus anterior muscle......PURPOSE: Neck and shoulder complaints are common among employees in occupations characterized by intensive computer use. Treatment has varied from passive rest to active treatments and active treatments have often been divided into either training of the painful area or the surrounding musculature...... while minimizing direct training of the upper trapezius-is effective in reducing pain in adults with chronic non-specific pain in the neck/shoulder region. METHODS: 47 office workers with chronic non-specific pain in the neck/shoulder region were randomized to 10 weeks 3 × 20 min SFT with training...

  14. The effect of shoulder supporting banding and shoulder pulling banding using elastic bands on shoulder pain and scapular position of a scapular dyskinesis patient with shoulder depression and scapular downward rotation

    OpenAIRE

    Yoo, Won-gyu

    2016-01-01

    [Purpose] This study developed methods of shoulder supporting banding and shoulder pulling banding using elastic bands for scapular dyskinesis patients with shoulder depression and scapular downward rotation and investigated the effect on shoulder pain and scapular position. [Subject] The subject was a scapular dyskinesis patient with shoulder depression and scapular downward rotation and shoulder pain. [Methods] This study compared the scapular position and upper trapezius pressure pain betw...

  15. Distal Traditional Acupuncture Points of the Large Intestinal Meridian and the Stomach Meridian Differently Affect Heart Rate Variability and Oxygenation of the Trapezius Muscle

    Directory of Open Access Journals (Sweden)

    Yukiko Shiro

    2014-01-01

    Full Text Available Physicians in traditional Chinese medicine have found that acupoints and meridians have effects on specific parts of the body. The aim of this study was to see how acupressure at distal acupuncture points of a specific meridian affects heart rate variability (HRV and oxygenation of the trapezius muscle. Forty-one female participants were randomly allocated to three groups. Subjects in the Stomach Meridian acupuncture point (ST group received acupressure at ST 34, ST 36, and ST 41, subjects in the Large Intestinal Meridian acupuncture point (LI group received acupressure at LI 4, LI 10, and LI 11, and subjects in the control group did not receive any stimuli. HRV and oxygenation of the trapezius muscles were measured. The high frequency components of HRV in the control and LI groups tended to be higher than those in the ST group. Total hemoglobin in the control and LI groups eventually reached significantly higher levels than in the ST group. While oxyhemoglobin (ΔO2Hb in the control and LI groups did not change, ΔO2Hb in the ST significantly decreased temporarily.

  16. Segmental overgrowth syndrome due to an activating PIK3CA mutation identified in affected muscle tissue by exome sequencing

    DEFF Research Database (Denmark)

    Rasmussen, Maria; Sunde, Lone; Weigert, Karen Petra; Bogaard, Pauline Wilhemina; Lildballe, Dorte Launholt

    Mosaic PIK3CA-mutations have been described in an increasing number of overgrowth syndromes. We describe a patient with a previously unreported segmental overgrowth syndrome with the mutation, PIKCA3 c.3140A>G (p.His1047Arg) in affected tissue diagnosed by exome sequencing. This PIK3CA-associated...

  17. Silver nanoparticles administered to chicken affect VEGFA and FGF2 gene expression in breast muscle and heart

    DEFF Research Database (Denmark)

    Hotowy, Anna Malgorzata; Sawosz, Ewa; Pineda, Lane Manalili;

    2012-01-01

    Nanoparticles of colloidal silver (AgNano) can influence gene expression. Concerning trials of AgNano application in poultry as antimicrobial and metabolic agents, it is useful to reveal whether they affect the expression of genes crucial for bird development. AgNano were administered to broiler...

  18. Human Muscle Fiber

    Science.gov (United States)

    2003-01-01

    The stimulus of gravity affects RNA production, which helps maintain the strength of human muscles on Earth (top), as seen in this section of muscle fiber taken from an astronaut before spaceflight. Astronauts in orbit and patients on Earth fighting muscle-wasting diseases need countermeasures to prevent muscle atrophy, indicated here with white lipid droplets (bottom) in the muscle sample taken from the same astronaut after spaceflight. Kerneth Baldwin of the University of California, Irvine, is conducting research on how reducing the stimulus of gravity affects production of the RNA that the body uses as a blueprint for making muscle proteins. Muscle proteins are what give muscles their strength, so when the RNA blueprints aren't available for producing new proteins to replace old ones -- a situation that occurs in microgravity -- the muscles atrophy. When the skeletal muscle system is exposed to microgravity during spaceflight, the muscles undergo a reduced mass that translates to a reduction in strength. When this happens, muscle endurance decreases and the muscles are more prone to injury, so individuals could have problems in performing extravehicular activity [space walks] or emergency egress because their bodies are functionally compromised.

  19. Meat physical quality and muscle fibre properties of rabbit meat as affected by the sire breed, season, parity order and gender in an organic production system

    Directory of Open Access Journals (Sweden)

    A. Dalle Zotte

    2016-06-01

    Full Text Available The aim of the study was to evaluate some meat physical quality and muscle fibre properties of rabbit meat when considering 2 sire breeds (SB: Vienna Blue [VB]; Burgundy Fawn [BF]; both coloured and slow-growing breeds, several parity orders (P: 1, 2, ≥3, gender (G, and 2 slaughter seasons (SS: spring, summer in an organic production system. The effect of storage time (ST at frozen state (2 mo at –20°C of Longissimus lumborum (LL meat was also evaluated. Animals were slaughtered when they reached 2.8 kg of live weight. Then, pH and L*a*b* colour values of Biceps femoris (BF and LL muscles, water loss and Warner-Bratzler shear force of LL and hind leg (HL meat, and the fibre typing and enzymatic activity of LL muscle were analysed. LL meat from females showed higher b* values than males (0.04 vs. –1.25; P<0.05. Significant (P<0.05 SB×P, SB×G and P×G interactions were observed for the b* value of LL: VB and BF crossbreds presented a higher b* value when born as P≥3 and P2 respectively, VB females showed higher b* value than VB males, and P2 and P≥3 produced males with a significantly lower b* value. HL thawing losses were significantly (P<0.05 higher in rabbits slaughtered in summer than in those slaughtered in spring, whereas the opposite result was obtained for LL meat (P<0.01. Cooking loss of LL meat was significantly lower in P2 group than P≥3 group (P<0.05. The lactate dehydrogenase activity in LL muscle was higher in VB than in BF crossbreds (930 vs. 830 IU; P<0.05, albeit not supported by differences in fibre type distribution. The ST significantly (P<0.01 reduced pH, a* and b* colour values, and increased lightness of LL meat. It was concluded that the crossbreeds derived from VB and BF genotypes and farmed organically did not show remarkable sexual dimorphism, considering their elder slaughter age than rabbits reared under intensive conditions. Physical quality of meat was mainly affected by slaughter season, indicating

  20. Low-Cost Alternative External Rotation Shoulder Brace and Review of Treatment in Acute Shoulder Dislocations

    Directory of Open Access Journals (Sweden)

    Lacy, Kyle

    2015-01-01

    Full Text Available Traumatic dislocations of the shoulder commonly present to emergency departments (EDs. Immediate closed reduction of both anterior and posterior glenohumeral dislocations is recommended and is frequently performed in the ED. Recurrence of dislocation is common, as anteroinferior labral tears (Bankart lesions are present in many anterior shoulder dislocations.14,15,18,23 Immobilization of the shoulder following closed reduction is therefore recommended; previous studies support the use of immobilization with the shoulder in a position of external rotation, for both anterior and posterior shoulder dislocations.7-11,19 In this study, we present a technique for assembling a low-cost external rotation shoulder brace using materials found in most hospitals: cotton roll, stockinette, and shoulder immobilizers. This brace is particularly suited for the uninsured patient, who lacks the financial resources to pay for a pre-fabricated brace out of pocket. We also performed a cost analysis for our low-cost external rotation shoulder brace, and a cost comparison with pre-fabricated brand name braces. At our institution, the total materials cost for our brace was $19.15. The cost of a pre-fabricated shoulder brace at our institution is $150 with markup, which is reimbursed on average at $50.40 according to our hospital billing data. The low-cost external rotation shoulder brace is therefore a more affordable option for the uninsured patient presenting with acute shoulder dislocation. [West J Emerg Med. 2015;16(1:114–120.

  1. Two Consecutive Days of Crossfit Training Affects Pro and Anti-inflammatory Cytokines and Osteoprotegerin without Impairments in Muscle Power.

    Science.gov (United States)

    Tibana, Ramires A; de Almeida, Leonardo M; Frade de Sousa, Nuno M; Nascimento, Dahan da Cunha; Neto, Ivo V de Sousa; de Almeida, Jeeser A; de Souza, Vinicius C; Lopes, Maria de Fátima T P L; Nobrega, Otávio de Tolêdo; Vieira, Denis C L; Navalta, James W; Prestes, Jonato

    2016-01-01

    The aim of this study was to investigate the effects of two consecutive Crossfit® training sessions (24 h apart) designed to enhance work-capacity that involved both cardiovascular and muscular exercises on cytokines, muscle power, blood lactate and glucose. Nine male members of the CrossFit® community (age 26.7 ± 6.6 years; body mass 78.8 ± 13.2 kg; body fat 13.5 ± 6.2%; training experience 2.5 ± 1.2 years) completed two experimental protocols (24 h apart): (1) strength and power exercises, (2) gymnastic movements, and (3) metabolic conditioning as follows: 10 min of as many rounds as possible (AMRAP) of 30 double-unders and 15 power snatches (34 kg). The same sequence as repeated on session 2 with the following metabolic conditioning: 12 min AMRAP of: row 250 m and 25 target burpees. Serum interleukin-6 (IL-6), IL-10, and osteoprotegerin were measured before, immediately post and 24 h after workout of the day (WOD) 1, immediately post, 24 and 48 h after WOD 2. Peak and mean power were obtained for each repetition (back squat with 50% of 1 repetition maximum) using a linear position transducer measured before, immediately post and 24 h after WOD 1, immediately post and 24 h after WOD 2. Blood lactate and glucose were measured pre and immediately post WOD 1 and 2. Although both sessions of exercise elicited an significant increase in blood lactate (1.20 ± 0.41 to 11.84 ± 1.34 vs. 0.94 ± 0.34 to 9.05 ± 2.56 mmol/l) and glucose concentration (81.59 ± 10.27 to 114.99 ± 12.52 vs. 69.47 ± 6.97 to 89.95 ± 19.26 mg/dL), WOD 1 induced a significantly greater increase than WOD 2 (p ≤ 0.05). The training sessions elicited significant changes (p ≤ 0.05) in IL-6, IL-10 and osteoprotegerin concentration over time. IL-6 displayed an increase immediately after training WOD 1 [197 ± 109%] (p = 0.009) and 2 [99 ± 58%] (p = 0.045). IL-10 displayed an increase immediately after only WOD 1 [44 ± 52%] (p = 0.046), and decreased 24 and 48 h following WOD 2 (~40%; p

  2. Two Consecutive Days of Crossfit Training Affects Pro and Anti-inflammatory Cytokines and Osteoprotegerin without Impairments in Muscle Power

    Science.gov (United States)

    Tibana, Ramires A.; de Almeida, Leonardo M.; Frade de Sousa, Nuno M.; Nascimento, Dahan da Cunha; Neto, Ivo V. de Sousa; de Almeida, Jeeser A.; de Souza, Vinicius C.; Lopes, Maria de Fátima T. P. L.; Nobrega, Otávio de Tolêdo; Vieira, Denis C. L.; Navalta, James W.; Prestes, Jonato

    2016-01-01

    The aim of this study was to investigate the effects of two consecutive Crossfit® training sessions (24 h apart) designed to enhance work-capacity that involved both cardiovascular and muscular exercises on cytokines, muscle power, blood lactate and glucose. Nine male members of the CrossFit® community (age 26.7 ± 6.6 years; body mass 78.8 ± 13.2 kg; body fat 13.5 ± 6.2%; training experience 2.5 ± 1.2 years) completed two experimental protocols (24 h apart): (1) strength and power exercises, (2) gymnastic movements, and (3) metabolic conditioning as follows: 10 min of as many rounds as possible (AMRAP) of 30 double-unders and 15 power snatches (34 kg). The same sequence as repeated on session 2 with the following metabolic conditioning: 12 min AMRAP of: row 250 m and 25 target burpees. Serum interleukin-6 (IL-6), IL-10, and osteoprotegerin were measured before, immediately post and 24 h after workout of the day (WOD) 1, immediately post, 24 and 48 h after WOD 2. Peak and mean power were obtained for each repetition (back squat with 50% of 1 repetition maximum) using a linear position transducer measured before, immediately post and 24 h after WOD 1, immediately post and 24 h after WOD 2. Blood lactate and glucose were measured pre and immediately post WOD 1 and 2. Although both sessions of exercise elicited an significant increase in blood lactate (1.20 ± 0.41 to 11.84 ± 1.34 vs. 0.94 ± 0.34 to 9.05 ± 2.56 mmol/l) and glucose concentration (81.59 ± 10.27 to 114.99 ± 12.52 vs. 69.47 ± 6.97 to 89.95 ± 19.26 mg/dL), WOD 1 induced a significantly greater increase than WOD 2 (p ≤ 0.05). The training sessions elicited significant changes (p ≤ 0.05) in IL-6, IL-10 and osteoprotegerin concentration over time. IL-6 displayed an increase immediately after training WOD 1 [197 ± 109%] (p = 0.009) and 2 [99 ± 58%] (p = 0.045). IL-10 displayed an increase immediately after only WOD 1 [44 ± 52%] (p = 0.046), and decreased 24 and 48 h following WOD 2 (~40%; p

  3. Shoulder deformities from obstetrical brachial plexus paralysis

    International Nuclear Information System (INIS)

    Abnormalities are described in the shoulders of 11 patients up to 17 years of age who have chronic brachial plexus paralyses from birth injuries. These abnormalities include a poorly formed and hypoplastic humeral head, a short abnormally formed clavicle, and a hypoplastic elevated scapula with a shallow glenoid fossa, inferiorly directed coracoid process, and abnormally tapered acromion. Four also had subluxated shoulders. (orig.)

  4. Avoiding Shoulder Injury from Resistance Training.

    Science.gov (United States)

    Durall, Chris J.; Manske, Robert C.; Davies, George J.

    2001-01-01

    Identifies shoulder exercises commonly performed in fitness centers that may contribute to or exacerbate glenohumeral joint (shoulder) injury, describing alternative exercises that may be substituted and a offering rationale for the variations. The article focuses on anterior and posterior glenohumeral instability, subacromial impingement (primary…

  5. Shoulder Ultrasonography: Performance and Common Findings

    Directory of Open Access Journals (Sweden)

    Diana Gaitini

    2012-01-01

    Full Text Available Ultrasound (US of the shoulder is the most commonly requested examination in musculoskeletal US diagnosis. Sports injuries and degenerative and inflammatory processes are the main sources of shoulder pain and functional limitations. Because of its availability, low cost, dynamic examination process, absence of radiation exposure, and ease of patient compliance, US is the preferred mode for shoulder imaging over other, more sophisticated, and expensive methods. Operator dependence is the main disadvantage of US examinations. Use of high range equipment with high resolution transducers, adhering to a strict examination protocol, good knowledge of normal anatomy and pathological processes and an awareness of common pitfalls are essential for the optimal performance and interpretation of shoulder US. This article addresses examination techniques, the normal sonographic appearance of tendons, bursae and joints, and the main pathological conditions found in shoulder ultrasonography.

  6. Double contrast CT diagnosis of shoulder instability

    International Nuclear Information System (INIS)

    Purpose: To study clinical importance of double contrast CT arthrography in the diagnosis of shoulder instability. Materials and methods: Eight patients were diagnosed as having shoulder instability with double contrast CT. The technique involved injection of 4 ml, 76% urografin and 10 ml of room air through an anterior shoulder puncture. The CT images were obtained with the patients supine and prone position. Results: The results of the CT arthrography were confirmed during the surgical operation afterward. The characteristics of abnormal double contrast CT arthrograms. They included anterior labral tear: the rounded anterior glenoid labrum, detached anterior labrum and anterior labral fragment; anterior capsular stripping off the anterior scapular glenoid neck; and enlargement of anterior and posterior capsular stripping off the anterior scapular glenoid neck; and enlargement of anterior and posterior capsular cavity. Conclusion: The current CT arthrography provides important X-ray information for both diagnosis of shoulder instability and anatomical repair of shoulder instability

  7. Arthrography of the dog's shoulder

    International Nuclear Information System (INIS)

    Different volumes with varying concentrations of meglumine-sodium diatrizoate were injected to study positive contrast shoulder arthrograms in six experimental dogs weighing 23-37 kg. The best delineation of the articular cartilage was obtained following injection of 1.5 ml of a 25% solution (185 mg iodine/joint). To visualize the bicipital tendon sheet and the different pouches of the shoulder joint, 6 ml of a 25% solution (750 mg iodine/joint) should be used. If no definite lesions are previewed, 6 ml of a 19% solution (550 mg iodine/joint) offers an acceptable compromise since with this volume and concentration no pooling of contrast medium overlapping the caudal area of the humeral head was seen. Radiographs should be obtained within 5 minutes after injection of the contrast medium. After that period the delineation of the joint structures is vaguening by absorption of the contrast medium. Repeated contrast examination with meglumine-sodium diatrizoate should be avoided. After four procedures at weekly intervals, the necropsy performed on two dogs showed inflammatory changes of the synovial membrane

  8. Diagnostic imaging of shoulder impingement

    International Nuclear Information System (INIS)

    Magnetic resonance imaging is a method that has been advancing in the last few years to the modality of choice for diagnostic evaluation of the bone joints, as the method is capable of imaging not only the ossous but also the soft tissue components of the joint. MRI likewise has become an accepted method for diagnostic evaluation of syndromes of the shoulder, with high diagnostic accuracy in detecting rotator cuff lesions, or as an efficient MRI arthrography for evaluation of the instability or lesions of the labrocapsular complex. In the evaluation of early stages of shoulder impingement, the conventional MRI technique as a static technique yields indirect signs which in many cases do not provide the diagnostic certainty required in order to do justice to the functional nature of the syndrome. In these cases, functional MRI for imaging of the arm in abducted position and in rotational movement may offer a chance to early detect impingement and thus identify patients who will profit from treatment at an early stage

  9. Interventional microadhesiolysis: A new nonsurgical release technique for adhesive capsulitis of the shoulder

    Directory of Open Access Journals (Sweden)

    Lim Tae-Kyun

    2008-01-01

    Full Text Available Abstract Background A nonsurgical intervention, interventional microadhesiolysis, was developed to release adhesions in joints and soft tissues. This paper introduces the procedure and evaluates the efficacy of the intervention for adhesive capsulitis of the shoulder. Methods Ten patients (five men and five women with primary adhesive capsulitis of the shoulder were treated at a chronic pain management center in Korea. Three specially made needles are used in interventional microadhesiolysis: the Round, Flexed Round, and Ahn's needles. A Round Needle is inserted on the skin over middle of supraspinatus and advanced under the acromion and acromioclavicular joint (subacromial release. A Flexed Round Needle is inserted two-fingers caudal to the inferior border of the scapular spine and advanced over the capsule sliding on the surface of infraspinatus muscle-tendon fascia. The capsule is released while an assistant simultaneously passively abducts the shoulder to full abduction (posteroinferior capsule release. An Ahn's Needle is inserted on the skin over the lesser tubercle and advanced under the coracoid process sliding on the surface of the subscapularis muscle (subcoracoid release. Results After the patients underwent interventional microadhesiolysis, the self-rated pain score or severity declined significantly (p p Conclusion Our findings suggest that interventional microadhesiolysis is effective for managing adhesive capsulitis of the shoulder.

  10. Posterior shoulder tightness and rotator cuff strength assessments in painful shoulders of amateur tennis players

    Directory of Open Access Journals (Sweden)

    Freddy B. Marcondes

    2013-04-01

    Full Text Available BACKGROUND: Previous studies have shown a relationship between shoulder posterior capsule tightness and shoulder pain in overhead athletes. However, this relationship has not been studied in tennis players. OBJECTIVES: Assessment of the shoulder range of motion (ROM, strength and posterior capsule tightness of skilled amateur tennis players who had complaints of dominant shoulder pain in comparison with tennis players without pain. METHOD: Forty-nine skilled amateur tennis players were distributed in 2 groups: Control Group (n=22 and Painful Group (n=27. The first group was composed of asymptomatic subjects, and the second was composed of subjects with shoulder pain on the dominant side. These groups were evaluated to determine the dominant and non-dominant shoulder ROM (internal and external rotation, isometric shoulder strength (internal and external rotation and posterior shoulder tightness by blind evaluators. RESULTS: The ANOVA results indicated significant differences between the groups in the dominant shoulder ROM, posterior capsule tightness, external rotation strength and strength ratio (p<0.05. The intragroup analysis (dominant versus non-dominant in the Painful Group displayed a significant difference for ROM, posterior capsule tightness and external rotation strength (p<0.05. CONCLUSIONS: The tennis players with pain in the dominant shoulder presented greater posterior capsule tightness, internal rotation deficit (ROM, external rotation gain (ROM and deficits in external rotation strength than the tennis players without pain.

  11. 14 CFR 121.311 - Seats, safety belts, and shoulder harnesses.

    Science.gov (United States)

    2010-01-01

    ... defined in Federal Motor Vehicle Safety Standard No. 213 (49 CFR 571.213)), vest- and harness-type child.... Editorial Note: For Federal Register citations affecting § 121.311, see the List of CFR Sections Affected... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Seats, safety belts, and shoulder...

  12. SHOULDER MUSCLE IMBALANCE AND SUBACROMIAL IMPINGEMENT SYNDROME IN OVERHEAD ATHLETES

    OpenAIRE

    Page, Phil

    2011-01-01

    Subacromial impingement is a frequent and painful condition among athletes, particularly those involved in overhead sports such as baseball and swimming. There are generally two types of subacromial impingement: structural and functional. While structural impingement is caused by a physical loss of area in the subacromial space due to bony growth or inflammation, functional impingement is a relative loss of subacromial space secondary to altered scapulohumeral mechanics resulting from glenohu...

  13. The results of arthroscopic anterior stabilisation of the shoulder using the bioknotless anchor system

    Directory of Open Access Journals (Sweden)

    Cooke Stephen J

    2009-01-01

    Full Text Available Abstract Background Shoulder instability is a common condition, particularly affecting a young, active population. Open capsulolabral repair is effective in the majority of cases, however arthroscopic techniques, particularly using suture anchors, are being used with increasing success. Methods 15 patients with shoulder instability were operated on by a single surgeon (VK using BioKnotless anchors (DePuy Mitek, Raynham, MA. The average length of follow-up was 21 months (17 to 31 with none lost to follow-up. Constant scores in both arms, patient satisfaction, activity levels and recurrence of instability was recorded. Results 80% of patients were satisfied with their surgery. 1 patient suffered a further dislocation and another had recurrent symptomatic instability. The average constant score returned to 84% of that measured in the opposite (unaffected shoulder. There were no specific post-operative complications encountered. Conclusion In terms of recurrence of symptoms, our results show success rates comparable to other methods of shoulder stabilisation. This technique is safe and surgeons familiar with shoulder arthroscopy will not encounter a steep learning curve. Shoulder function at approximately 2 years post repair was good or excellent in the majority of patients and it was observed that patient satisfaction was correlated more with return to usual activities than recurrence of symptoms.

  14. Patients with shoulder impingement remain satisfied 6 years after arthroscopic subacromial decompression

    Science.gov (United States)

    2011-01-01

    Background Although arthroscopic subacromial decompression (ASD) is a common procedure for treatment of shoulder impingement, few long term results have been published. In this prospective study, we determined whether the high degree of patient satisfaction at 6 months postoperatively reported by us earlier remained at the 6-year follow-up. Patients and methods We originally reported high patient satisfaction 6 months after ASD for shoulder impingement in 50 prospectively studied patients using the Disability of the Arm Shoulder and Hand questionnaire (DASH) and the Visual Analog Scale (VAS). Patients with associated shoulder disorders were excluded. The surgeons were experienced shoulder arthroscopists. 6 years after surgery, the DASH questionnaire and the VAS were sent to these 50 patients. 2 patients had other medical problems of the upper extremity that affected the DASH and VAS scores, 1 patient was lost to follow-up, and another refused to participate. Thus, 46 patients with a mean age of 55 (33–78) years were included in this 6-year evaluation. Results The considerable improvement in both the DASH score and the VAS that was observed 6 months after surgery persisted or had even improved 6 years after surgery. Interpretation Properly selected patients with shoulder impingement treated with ASD remain satisfied 6 years after surgery. PMID:21999621

  15. Magnetic resonance imaging of the shoulder

    International Nuclear Information System (INIS)

    Full text: Magnetic resonance imaging (MRI) is an excellent non-invasive imaging tool that can complement the physical examination in the evaluation of traumatic and non-traumatic injuries of the shoulder. The superb soft tissue contrast and multiplanar capabilities of MRI make it a preferred modality to provide a global assessment of the soft tissue and osseous structures of the shoulder. Learning objectives: to review briefly the anatomy of the shoulder and the specificity of sequences and planes for MRI; to demonstrate the characteristic MR findings of some of the most common shoulder disorders; to indicate how MR arthrography (MRA) of the shoulder can add extra value to the diagnostic process; to outline a systematic approach to the interpretation of the shoulder MR examination. Choosing the most suitable sequences and planes as well as the thorough knowledge of the anatomic structures assist the correct diagnosis of the pathologic disorders of the shoulder which is of great importance for the precise treatment management, surgical versus conservative, as well as for the appropriate surgical approach, open versus arthroscopic

  16. Shoulder movements during the initial phase of learning manual wheelchair propulsion in able-bodied subjects.

    OpenAIRE

    Roux, Laurence; Hanneton, Sylvain; Roby-Brami, Agnès

    2006-01-01

    BACKGROUND: The kinetics and kinematics of the glenohumeral joints, and shoulder muscles activities during the initial phase of learning wheelchair propulsion by individuals with paraplegia have been partially described. But no studies carry out the kinematics of the upper-limb during the learning of non-constrained open field locomotion with a wheelchair. METHODS: Ten subjects with no manual wheelchair experience propelled themselves repetitively straight ahead along an 11m linear path. Uppe...

  17. Does C5 or C6 Radiculopathy Affect the Signal Intensity of the Brachial Plexus on Magnetic Resonance Neurography?

    Science.gov (United States)

    Seo, Tae Gyu; Kim, In-Soo; Son, Eun Seok

    2016-01-01

    Patients with C5 or C6 radiculopathy complain of shoulder area pain or shoulder girdle weakness. Typical idiopathic neuralgic amyotrophy (INA) is also characterized by severe shoulder pain, followed by paresis of shoulder girdle muscles. Recent studies have demonstrated that magnetic resonance neurography (MRN) of the brachial plexus and magnetic resonance imaging (MRI) of the shoulder in patients with INA show high signal intensity (HSI) or thickening of the brachial plexus and changes in intramuscular denervation of the shoulder girdle. We evaluated the value of brachial plexus MRN and shoulder MRI in four patients with typical C5 or C6 radiculopathy. HSI of the brachial plexus was noted in all patients and intramuscular changes were observed in two patients who had symptoms over 4 weeks. Our results suggest that HSI or thickening of the brachial plexus and changes in intramuscular denervation of the shoulder girdle on MRN and MRI may not be specific for INA. PMID:27152289

  18. Navigating the Alphabet Soup of Labroligamentous Pathology of the Shoulder.

    Science.gov (United States)

    Fitzpatrick, Darren; Grubin, Jeremy

    2016-02-01

    Because of the widespread use of eponyms and acronyms to describe labroligamentous findings in the shoulder, interpreting shoulder magnetic resonance imaging reports can be challenging. A summary of the appearance of these lesions on shoulder magnetic resonance images can help the orthopedic surgeon to understand these entities as imaging findings and to determine the appropriate treatment for patients with shoulder injuries. PMID:26866313

  19. Imaging of bursae around the shoulder joint

    Energy Technology Data Exchange (ETDEWEB)

    Bureau, N.J. [Department of Radiology, Hotel-Dieu de Montreal Hospital, Montreal, Quebec (Canada); Dussault, R.G. [Department of Radiology, Health Sciences Center, University of Virginia, Charlottesville, Virginia (United States); Keats, T.E. [Department of Radiology, Health Sciences Center, University of Virginia, Charlottesville, Virginia (United States)

    1996-08-01

    The authors present a review of the anatomy of the major bursae around the shoulder joint and discuss the use of the different imaging modalities which demonstrate their radiologic features. The calcified subacromial-subdeltoid bursa has a characteristic appearance on plain radiographs. When inflamed it can be visualized by ultrasound and magnetic resonance imaging. Calcific bursitis may involve the subcoracoid bursa. This bursa may mimic adhesive capsulitis of the shoulder or complete rotator cuff tear when injected inadvertently during shoulder arthrography. Less well known are three coracoclavicular ligament bursae. These are also subject to calcific bursitis and have a typical radiologic appearance. (orig.). With 6 figs.

  20. MRI findings in little leaguer's shoulder

    International Nuclear Information System (INIS)

    Little leaguer's shoulder, a stress injury of the proximal humeral physis, should be considered in the differential diagnosis for an adolescent baseball player with shoulder pain, especially if the player is pitching regularly in a competitive environment. While roentgenographs may or may not be helpful, depending on the duration and severity of the injury, we report the MRI appearance of a case of little leaguer's shoulder. We found MRI helpful in diagnosing injury to the growth plate that was radiographically occult; furthermore, we were able to document the patient's progress with a follow-up MRI examination, which showed improvement with treatment. (orig.)