Abstract
ABSTRACTA stroke patient with right hemiplegia and mirror movement underwent transcranial magnetic stimulation (TMS) and somatosensory-evoked potential (SEP) testing. The motor-evoked potentials (MEPs) of both abductor pollicis brevis muscles after stimulating the unaffected right hemisphere showed similar latencies, and were potentially produced by corticospinal tracts from the same motor cortex. N20 responses of SEPs were recorded at C4′ after contralateral stimulation of the unaffected left median nerve, but not stimulation of the affected right median nerve. The mirror movements and motor recovery might have utilized an ipsilateral motor pathway between the unaffected hemisphere and the affected hand.
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