日中の空間・時間判断に及ぼすウルトラディアン変動の影響
Use this link to cite this item : http://doi.org/10.15027/25741
ID | 25741 |
file | |
title alternative | Effects of ultradian variation on the spatial and temporal cognitive judgment
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creator |
Hori, Tadao
Morikawa, Toshio
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subject | Ultradian rhythm
cognitive task
BRAC
EEG
coherence
laterality index
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NDC |
Medical sciences
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abstract | 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. |
journal title |
Memoirs of the Faculty of Integrated Arts and Sciences. III, Studies in information and behavior sciences
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volume | Volume 12
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start page | 1
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end page | 13
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date of issued | 1989-02-28
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publisher | 広島大学総合科学部
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issn | 0385-1478
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ncid | |
SelfDOI | |
language |
jpn
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nii type |
Departmental Bulletin Paper
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HU type |
Departmental Bulletin Papers
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DCMI type | text
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format | application/pdf
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text version | publisher
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rights | Copyright (c) 1988 by Faculty of Integrated Arts and Sciences, Hiroshima University. All rights reserved.
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department |
Graduate School of Integrated Arts and Sciences
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他の一覧 |