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Topography of somatosensory evoked potentials. Sadatoshi TSUJI 1 1Department of Neurology, School of Medicine, University of Occupational and Environmental Health pp.31-44
Published Date 1988/2/10
DOI https://doi.org/10.11477/mf.1431906164
  • Abstract
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Topographies and distributions of SEPs to median and posterior tibial nerve stimulation were studied in normal controls and patients with sensory and motor disturbance. SEPs recorded from the right centro-parieto-temporal electrodes to left median nerve stimulation were composed of 3 early negative (N16, N20, N30) and 3 early positive components (P13, P23, P25), whereas those recorded from both frontal electrodes dis-closed 2 early negativities (N16, N26) and 2 early positivities (P13, P20). N20 and P20 reversed across the rolandic fissure with no significant difference in their peak latencies. N20 and P20 had a dipolar distribution with a N20 at con-tralateral central and posterior areas to the stimulation site and P20 at both frontal areas in topography. On the other hand, P23 was ap-peared at first in the contralateral central area and then P25 at contralateral posterior areas and N26 at both frontal areas respectively in dynamic topography.


Copyright © 1988, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1243 印刷版ISSN 0001-8724 医学書院

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