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ID 25741
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別タイトル
Effects of ultradian variation on the spatial and temporal cognitive judgment
著者
堀 忠雄
森川 俊雄
キーワード
Ultradian rhythm
cognitive task
BRAC
EEG
coherence
laterality index
NDC
医学
抄録(英)
The structures of the ultradian variations among the cognitive task performance and the EEG activities were studied on eight male students. Referential central (C3, C4) and parietal (P3, P4) EEGs were recorded every 15 min of the eye closed rest period, when the subjects were asked to estimate a 120 sec period and to keep eyes closed for this period. Artifact free EEG data were analyzed for one minute by the FFT. EEG parameters used in this study are the amplitude (root power)

EEG laterality index and interhemispheric coherence. The EEG data were divided into five frequency bands (δ, θ, α, β1, β2).

After the time estimation task, subjects were asked to draw a vertical or horizontal 20 cm line and to point the midpoint of these lines.

The least square spectral method was applied on the time series of five task performance and EEG variables. About 100 min ultradian variations were identified in all of the variables, with the exception of the midpoint judgment which showed more shorter period, about 60 min cycles. Principal component analysis were examined on the task performance EEG variables. The results of PCA revealed that the EEG indicies of the interhemispheric activity were more closely related to the task performance than the single EEG amplitude. The EEG latelality indicies were highly correlated to the vertical line drawing, while the interhemispheric coherence were highly correlated to the horizontal line drawing. Anisotropy of space were observed in the daytime behavioral ultradian variations.
掲載誌名
広島大学総合科学部紀要. III, 情報行動科学研究
12巻
開始ページ
1
終了ページ
13
出版年月日
1989-02-28
出版者
広島大学総合科学部
ISSN
0385-1478
NCID
SelfDOI
言語
日本語
NII資源タイプ
紀要論文
広大資料タイプ
学内刊行物(紀要等)
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 1988 by Faculty of Integrated Arts and Sciences, Hiroshima University. All rights reserved.
部局名
総合科学研究科
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