Relevance of EEG alpha and theta oscillations during task switching

被引：143

作者：

Sauseng, P ^{[1
]}

Klimesch, W ^{[1
]}

Freunberger, R ^{[1
]}

Pecherstorfer, T ^{[1
]}

Hanslmayr, S ^{[1
]}

Doppelmayr, M ^{[1
]}

机构：

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

来源：

EXPERIMENTAL BRAIN RESEARCH | 2006年 / 170卷 / 03期

基金：

奥地利科学基金会;

关键词：

attention; central executive functions; coherence; long-term memory; top-down processes; working memory;

D O I：

10.1007/s00221-005-0211-y

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

In a task switching design, we investigated the question whether long-range theta coupling primarily reflects top-down control processes. Switch and stay trials did not differ with respect to memory load or global working memory (WM) demands. The results revealed significantly stronger theta coupling (in a range of 4-7 Hz) between prefrontal and posterior regions during switch as compared to stay trials. Power differences, reflecting more local effects, were largest in the upper alpha band (10-13 Hz) and over posterior brain areas, possibly reflecting long-term memory activation. The conclusion of the present study is that long-range coherent oscillatory activity in the theta band reflects top-down activation rather than global WM functions.

引用

页码：295 / 301

页数：7

共 37 条

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