Detection of early cognitive processing by event-related phase synchronization analysis

被引：22
作者：
Allefeld, C
Frisch, S
Schlesewsky, M
机构：
[1] Univ Potsdam, Res Unit Conflicting Rules, D-14415 Potsdam, Germany
[2] Univ Potsdam, Nonlinear Dynam Grp, D-14415 Potsdam, Germany
[3] Max Planck Inst Human Cognit & Brain Sci, Leipzig, Germany
[4] Univ Marburg, Jr Res Grp Neurolinguist, Marburg, Germany
来源：
NEUROREPORT | 2005年 / 16卷 / 01期
关键词：
alpha; coherence; color change; N400; P300; phase synchronization; semantic incongruity; theta;
D O I：
10.1097/00001756-200501190-00004
中图分类号：
Q189 [神经科学];
学科分类号：
071006 ;
摘要：
In order to investigate the temporal characteristics of cognitive processing, we apply multivariate phase synchronization analysis to event-related potentials. The experimental design combines a semantic incongruity in a sentence context with a physical mismatch (color change). In the ERP average, these result in an N400 component and a P300-like positivity, respectively. Synchronization analysis shows an effect of global desynchronization in the theta band around 288 ms after stimulus presentation for the semantic incongruity, while the physical mismatch elicits an increase of global synchronization in the alpha band around 204 ms. Both of these effects clearly precede those in the ERP aver-age. Moreover, the delay between synchronization effect and ERP component correlates with the complexity Of the cognitive processes. (C) 2005 Lippincott Williams Wilkins.
引用
收藏
页码：13 / 16
页数：4
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