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EFECTO EXCITO – MOTOR
Se produce contracción muscular producida por una excitación eléctrica externa:
Músculo normal: para potenciarlo más.
Músculo atrófico sin problemas de inervación: se produce una electroestimulación neuromuscular, un electrodo se coloca en el nervio y el otro en el músculo.
Músculo denervado: posee problemas de inervación y provoca que el músculo no se contraiga, se produce una electroestimulación muscular, ya que se pueden colocar los electrodos directamente sobre el músculo para provocar la estimulación directa.
La electroestimulación es la provocación de una contracción de un músculo concreto o de un grupo muscular con la aplicación de una corriente eléctrica.
Mecanismos de acción de la electroestimulación:
Periodo refractario: es la duración del proceso bioeléctrico que se produce en una célula muscular tras una despolarización:
Periodo refractario de fibras lentas: 20ms.
Periodo refractario de fibras rápidas: 4 – 5ms.
Tenemos que buscar una contracción mantenida.
No existe respuesta contráctil si estamos en el periodo refractario.
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Enviado por: El remitente no desea revelar su nombre Idioma: castellanoPaís: España