Induced alpha band power changes in the human EEG and attention

被引：694

作者：

Klimesch, W ^{[1
]}

Doppelmayr, M ^{[1
]}

Russegger, H ^{[1
]}

Pachinger, T ^{[1
]}

Schwaiger, J ^{[1
]}

机构：

[1] Salzburg Univ, Dept Physiol Psychol, A-5020 Salzburg, Austria

来源：

NEUROSCIENCE LETTERS | 1998年 / 244卷 / 02期

基金：

奥地利科学基金会;

关键词：

alpha; electroencephalography; induced oscillations; desynchronization; attention; expectancy;

D O I：

10.1016/S0304-3940(98)00122-0

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

Induced alpha power (in a lower, intermediate and upper band) which is deprived from evoked electroencephalograph (EEG) activity was analyzed in an oddball task in which a warning signal (WS) preceded a target or non-target. The lower band, reflecting phasic alertness, desynchronizes only in response to the WS and target. The intermediate band, reflecting expectancy, desynchronizes about 1 s before a target or non-target appears. Upper alpha desynchronizes only after a target is presented and, thus, reflects the performance of the task which was to count the targets. Thus, only slower alpha frequencies reflect attentional demands such as alertness and expectancy. (C) 1998 Elsevier Science Ireland Ltd.

引用

页码：73 / 76

页数：4

共 15 条

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