EEG alpha band dissociation with increasing task demands

被引:142
作者
Fink, A [1 ]
Grabner, RH [1 ]
Neuper, C [1 ]
Neubauer, AC [1 ]
机构
[1] Graz Univ, Inst Psychol, A-8010 Graz, Austria
来源
COGNITIVE BRAIN RESEARCH | 2005年 / 24卷 / 02期
基金
奥地利科学基金会;
关键词
EEG; ERD; alpha band; task demands;
D O I
10.1016/j.cogbrainres.2005.02.002
中图分类号
TP18 [人工智能理论];
学科分类号
081104 ; 0812 ; 0835 ; 1405 ;
摘要
In assuming functional differences between different EEG alpha frequency bands, recent studies emphasize the importance of using narrow (8-10 Hz or 10- 12 Hz) instead of broad alpha frequency ranges (8-12 Hz). Due to individual differences in alpha activity, it has also been suggested to adjust alpha frequency bands individually for each participant. The present paper highlights the dissociating role of different task demands on the extent of event-related desynchronization (ERD) in different alpha frequency bands. In analyzing the data of four large-scale EEG studies (with sample sizes of 51, 58, 55, and 66, respectively) employing a wide range of cognitive tasks, we found evidence that the correlations between lower and upper alpha band ERD systematically decline as task demands increase. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:252 / 259
页数:8
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