Brain connectivity at different time-scales measured with EEG

被引:123
|
作者
Koenig, T
Studer, D
Hubl, D
Melie, L
Strik, WK
机构
[1] Univ Hosp Clin Psychiat, Dept Psychiat Neurophysiol, CH-3000 Bern, Switzerland
[2] Cuban Neurosci Ctr, Havana, Cuba
关键词
synchronous neural oscillations; microstates; transient binding; combined electroencephalogram-functional magnetic resonance imaging;
D O I
10.1098/rstb.2005.1649
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
We present an overview of different methods for decomposing a multichannel spontaneous electroencephalogram (EEG) into sets of temporal patterns and topographic distributions. All of the methods presented here consider the scalp electric field as the basic analysis entity in space. In time, the resolution of the methods is between milliseconds (time-domain analysis), subseconds (time- and frequency-domain analysis) and seconds (frequency-domain analysis). For any of these methods, we show that large parts of the data can be explained by a small number of topographic distributions. Physically, this implies that the brain regions that generated one of those topographies must have been active with a common phase. If several brain regions are producing EEG signals at the same time and frequency, they have a strong tendency to do this in a synchronized mode. This view is illustrated by several examples (including combined EEG and functional magnetic resonance imaging (fMRI)) and a selective review of the literature. The findings are discussed in terms of short-lasting binding between different brain regions through synchronized oscillations, which could constitute a mechanism to form transient, functional neurocognitive networks.
引用
收藏
页码:1015 / 1023
页数:9
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