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ID 25743
file
title alternative
Topographic mapping of EEG with the variation of sleepiness
creator
Morikawa, Toshio
Hori, Tadao
NDC
Medical sciences
abstract
The relationship between the EEG topography and sleepiness was investigated in 5 normal students (aged 21- 26 yrs). They were assessed their sleepiness for 12 hours (19:00 to 07:00) at 20 min intervals via Kwansei-Gakuin sleepiness scale (KSS), visual analog scale (VAS) and the multiple sleep latency test (MSLT). The power spectra derived from 16 EEG leads were topographically displayed for every 1 Hz from 8 to 13 Hz, based on the initial 30 s EEG recordings of each MSLT period. With increasing sleepiness, the slow alpha band activities (8-9 Hz) developed around the occipital area, while the fast alpha band activities (12-13 Hz) tended to obscure at the parietal area. The topographic pattern for the activities of intermediate alpha band (10-11 Hz) were unchanged over the experimental period. These data suggest that the increase or decrease of the amplitude of the slow alpha activity and the fast alpha activity reflect the variation of sleepiness. The present study supplied the new perspectives for the study of sleepiness in terms of topographic mapping of the waking EEG.
journal title
Memoirs of the Faculty of Integrated Arts and Sciences. III, Studies in information and behavior sciences
volume
Volume 13
start page
61
end page
71
date of issued
1990-02-28
publisher
広島大学総合科学部
issn
0385-1478
ncid
SelfDOI
language
jpn
nii type
Departmental Bulletin Paper
HU type
Departmental Bulletin Papers
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 1989 by Faculty of Integrated Arts and Sciences, Hiroshima University. All rights reserved.
department
Graduate School of Integrated Arts and Sciences
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