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
Neuroreportjournal_title
Neuroreportauthors
Shimazu H,Kaji R,Tsujimoto T,Kohara N,Ikeda A,Kimura J,Shibasaki Hdoi
10.1097/00001756-200008210-00042subject
Has Abstractpub_date
2000-08-21 00:00:00pages
2821-6issue
12eissn
0959-4965issn
1473-558Xjournal_volume
11pub_type
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