High-frequency SEP components generated in the somatosensory cortex of the monkey.

Abstract:

:To investigate the origin of high-frequency somatosensory evoked potential (SEP) components, we recorded median nerve SEPs from the scalp and the depth in six monkeys. Laminar field potentials were analyzed in area 3b (N10; corresponding to human N20) and area 1 (P12; corresponding to human P25). After digital filtering (300-900 Hz), 4-6 components were identified, and the 1st to 4th peaks in area 3b (7-11 ms in latency) and the 3rd to 5th in area 1 (9-13 ms) showed clear polarity reversals between the surface and the depth of the cortex. These results provide direct evidence for intracortical origin of early high-frequency components in area 3b and of late ones in area 1.

journal_name

Neuroreport

journal_title

Neuroreport

authors

Shimazu H,Kaji R,Tsujimoto T,Kohara N,Ikeda A,Kimura J,Shibasaki H

doi

10.1097/00001756-200008210-00042

subject

Has Abstract

pub_date

2000-08-21 00:00:00

pages

2821-6

issue

12

eissn

0959-4965

issn

1473-558X

journal_volume

11

pub_type

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