Sample records for CIRCUITOS DE DISPARO (trigger circuits)

Sample records 1 - 5 shown.


Ejes neuroendocrinos del estrés, síndrome metabólico y alteraciones psiquiátricas del síndrome de Cushing/ Neuroendocrine axis of stress, metabolic syndrome and psychiatric disorders in cushing’s sindrome

Uribe Londoño, Federico; Gómez Rranco, Juliana; Mesa franco, Luisa Fernanda; lezcano tobón, Leidy alexandra

Resumen en español SE ANALIZA el papel de las anormalidades del eje hipotálamo-hipófisis-adrenales (HHA) en el estrés sostenido y la depresión. Además se pone en evidencia que algunos problemas hasta hace poco considerados puramente endocrino-metabólicos como el síndrome de Cushing (SC) (clínico o subclínico) y la obesidad, principalmente cuando hace parte del síndrome metabólico (SM), pueden tener una base etiológica común, como evento primario, comorbilidad o disparador en in (mas) dividuos con susceptibilidad genética a los estados de estrés crónico maladaptativo. Se describen algunas acciones lesivas del hipercortisolismo severo y/o sostenido en algunas áreas cerebrales y la posibilidad de producir alteraciones permanentes en algunos circuitos neuronales. Por último se explora, de acuerdo con algunas evidencias clínicas, el papel terapéutico potencial de fármacos antiglucocorticoides en el manejo de la depresión refractaria y el papel que pueden jugar la intervención psiquiátrica temprana y el tratamiento farmacológico antidepresivo, en algunos pacientes con síndrome metabólico y/ o aumento del riesgo cardiovascular. Resumen en inglés The role of abnormalities of the hypophysis-hypothalamus-adrenal gland axis (HHA) in the ongoing stress and depression is analyzed. Besides, it is evidenced that some problems, until recently considered merely endocrine-metabolic such as Cushing's syndrome (either clinical or subclinical) and obesity (mainly when it is part of the metabolic syndrome) may have a common etiological basis, be it a primary event, a comorbidity or a trigger in individuals with genetic suscepti (mas) bility to states of maladaptative chronic stress. Some harmful effects of severe and/or ongoing hypercortisolism on some brain areas and the possibility of permanent alterations in some neuronal circuits are described. Finally, and according to some clinical evidences, the potential therapeutic role of antiglucocorticoids in the management of refractory depression is explored, as well as the role that early psychiatric intervention and antidepressant pharmacological treatment may play in some patients with the metabolic syndrome or increased cardiovascular risk.

Scientific Electronic Library Online (Spanish)


Conclusion: Media on Fire

Ferrándiz Martín, Francisco

Digital.CSIC (Spain)


Avances en la clínica de las adicciones: el rol del aprendizaje y la dopamina/ Update in the clinic of addictions: learning and dopamine

Pérez F, Juan Manuel; Orellana V, Gricel

Resumen en inglés There are two parallel explanatory models for addictions. One is the homeostatic model, that explains tolerance and the abstinence syndrome. Tolerance and abstinence are reversible phenomena that mask sensitization. These appear more commonly with the continued use of drugs, and are based in the up-regulation of cyclic AMP. The other is the plasticity model, that explains sensitization and compulsive use of drugs or addiction. Addiction is probably irreversible, underlies (mas) tolerance, appears more frequently with intermittent use of drugs, and is based in learning and memory mechanisms. Both are boldly linked to environmental and behavioral elements. In the plasticity model, dopamine (DA) has an outstanding role. Its phasic discharge is a temporal reward prediction error marker. It is the prediction error that generates learning. All the addictive drugs provoke a very strong increase of phasic DA discharge in some cerebral nuclei by direct or indirect paths. This increase is interpreted by cerebral circuits as prediction errors that generate learning behaviors. Pavlovian and operating type learning is involved. It is clinically observed as the prominence of environmental cues that are related to drug consumption, and the appearance of behaviors directed to the search and use of drugs, that are mainly involuntary and triggered by these cues. Pleasure (primary reinforcement) plays a role in this model, only in the initial stages of addiction. Understanding this double parallel model allows to design therapeutic interventions directed towards a conscious control of involuntary, environmental and affective cues that trigger drug search and use

Scientific Electronic Library Online (Spanish)


A Portable Readout System for Microstrip Silicon Sensors (ALIBAVA)

Marco Hernández, Ricardo; Alibava Collaboration

Digital.CSIC (Spain)