Biceps Brachii Muscle Innervation Zone Location in Healthy Subjects Using High-Density Surface Electromyography

Entre las secuelas de lesiones del Sistema Nervioso Central se encuentra la espasticidad, la cual es de dificil manejo terapeutico. Los tratamientos actuales de la espasticidad consideran la administracion de la toxina botulinica. Sin embargo, los resultados de su aplicacion han sido muy variables en terminos de eficacia, atribuible a las distintas distancias entre el lugar de inyeccion y la zona de inervacion (ZI). La EMG de alta densidad se ha utilizado para recolectar informacion acerca de la fisiologia muscular y para localizar la ZI. El objetivo de este estudio fue describir la ubicacion de la ZI del musculo biceps braquial en sujetos jovenes sanos, durante una contraccion isometrica. Evaluamos el musculo biceps braquial en 20 sujetos sanos usando una matriz de 64 electrodos. El promedio de localizacion de la ZI fue de 34% en el sentido distal de la linea trazada entre la fosa cubital y el acromion anterior.

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