P9 in median nerve SEPs is a junctional potential generated by the change of the volume conductor size between trunk and neck

Authors
Mochizuki, A Sonoo, M Shimizu, T Iwata, M
Citation
A. Mochizuki et al., P9 in median nerve SEPs is a junctional potential generated by the change of the volume conductor size between trunk and neck, EVOKED POT, 108(6), 1998, pp. 584-587
Citations number
15
Categorie Soggetti
Neurosciences & Behavoir
Journal title
EVOKED POTENTIALS-ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY
ISSN journal
01685597 → ACNP
Volume
108
Issue
6
Year of publication
1998
Pages
584 - 587
Database
ISI
SICI code
0168-5597(199811)108:6<584:PIMNSI>2.0.ZU;2-9
Abstract
Objectives: We aimed to investigate the origin of P9 in median SEPs by appl ying the junctional potential theory. Methods: We studied the distribution over the body surface with contralater al shoulder reference in 4 normal subjects. Results: A stationary potential held P9/tN9 (=truncal N9) was recorded: P9 over head and neck (the smaller part), tN9 over trunk (the larger part), th e boundary being located between trunk and neck. This polarity agreed with that expected from simulation studies. Conclusions: P9 is a junctional potential generated by the change of the vo lume conductor size between trunk and neck. (C) 1998 Elsevier Science Irela nd Ltd. All rights reserved.