Article

Six selected cases with hemiplegia were studied with conventional four channel montage. Only those patients were selected in whom channel 1 (Erb's point referred to FZ) revealed all the early potentials (Erb's point, N13, PO and N20) on both normal and abnormal sides, while channel 3/4 (C3 or C4 referred to Fz) did not show any potential, starting with N20, on the abnormal side. In such patients N20 (corresponding to a positive wave over FZ) occurs at the same time in the central and frontal regions (20.6 sec in average) on the normal hemisphere. However on the abnormal side, with only one exception, N20 recorded in channel 1, was delayed by
1.2-4.6 MSEC. Review of the cat scans in this series suggests a relationship between the size of the lesion and the magnitude of this delay. It is concluded that :
1. A lesion that blocks the occurence of N20 in the central region may not involve the N20 (really P20) originated from a region electrically equidistant to C4 (C3), FZ and ear electrodes. 2. Determination of intrahemispheric conduction delay may be of importance for the functional prognosis in such patients.

Langue : ANGLAIS

Identifiant basis : 1985002389