EVENT-RELATED DESYNCHRONIZATION - THE EFFECTS OF ENERGETIC AND COMPUTATIONAL DEMANDS

被引：118

作者：

BOITEN, F ^{[1
]}

SERGEANT, J ^{[1
]}

GEUZE, R ^{[1
]}

机构：

[1] UNIV GRONINGEN,9700 AB GRONINGEN,NETHERLANDS

来源：

ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY | 1992年 / 82卷 / 04期

关键词：

EVENT-RELATED DESYNCHRONIZATION; AROUSAL; ACTIVATION;

D O I：

10.1016/0013-4694(92)90110-4

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

The effects of a subject's activation state on cognitive processing were studied, while subjects performed verbal and non-verbal tasks under a speed and accuracy instruction. It was found that stressing speed influenced the level of prestimulus alpha power and consequently the amount of relative event-related desynchronization (ERD). Increasing task complexity led to an increase in the amount and duration of relative ERD. Both prestimulus level of alpha power and relative ERD were asymmetrically distributed over the left and right hemispheres. No verbal/non-verbal task-dependent asymmetries in phasic ERD were found. The data suggest that the level of prestimulus alpha power is mainly influenced by the subject's activation state, whereas relative ERD mainly reflects phasic changes in cognitive processing.

引用

页码：302 / 309

页数：8

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