par Tomberg, Claude
;Caramia, M D
Référence Electroencephalography and clinical neurophysiology, 81, 4, page (319-322)
Publication Publié, 1991-08

Référence Electroencephalography and clinical neurophysiology, 81, 4, page (319-322)
Publication Publié, 1991-08
Article révisé par les pairs
Résumé : | When recording the onset of the electromyographic (EMG) voluntary response in reaction time (RT) studies, the electrodes should be placed on the muscle which is first and foremost involved in executing the response. It is thus necessary to identify which is the prime mover muscle among active synergic muscles. This has been investigated for index finger lift or flexion RTs by delivering a magnetic stimulus to motor cortical areas prior to the subject's voluntary response. The EMG responses to the magnetic stimulus were selectively facilitated either in the extensor indicis proprius muscle (in index lift RTs) or in the first dorsal interosseous muscle (in index flexion RTs). These effects are robust and provide a method for identifying the prime mover muscle in voluntary movements. |