A sense of movement elicited in paralyzed distal arm by focal magnetic coil stimulation of human motor cortex.

Two magnetic coils (MCs) of special design (Cadwell Laboratories) were used to elicit movements predominantly of one or a few digits by percutaneous stimulation of human motor cortex. When cortically elicited movements were ischemically blocked, the MC still elicited a discrete sense of digit movement; a sense of movement map was constructed by stimulating at different scalp sites. Our findings support the existence of corollary discharge.