Fig. 7

Somatosensory evoked potential studies comparing the patient and healthy control. Predominant signals of the cortex were detected ipsilateral to the stimulus in the patient (a, b), in contrast to predominant signals of the cortex contralateral to the stimulus in the healthy control (c, d). a, c the right-side stimulus. b, d the left-side stimulus. Lead I: ipsilateral Erb point, Lead II: contralateral cortex, Lead III: ipsilateral cortex