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

  • 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. The synchronization analysis shows an effect of global desynchronization in the theta band around 288ms after stimulus presentation for the semantic incongruity, while the physical mismatch elicits an increase of global synchronization in the alpha band around 204ms. Both of these effects clearly precede those in the ERP average. Moreover, the delay between synchronization effect and ERP component correlates with the complexity of the cognitive processes.

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Author:Carsten Allefeld, Stefan Frisch, Matthias Schlesewsky
Series (Serial Number):Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (paper 074)
Document Type:Postprint
Date of Publication (online):2008/09/10
Year of Completion:2005
Publishing Institution:Universität Potsdam
Release Date:2008/09/10
Tag:N400; P300; alpha; coherence; color change; phase synchronization; semantic incongruity; theta
Source:Neuroreport. - 16 (2005), 1, pp. 13 - 16. ISSN (print) 0959-4965, ISSN (online) 1473-558X
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Extern / Extern
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoKeine Nutzungslizenz vergeben - es gilt das deutsche Urheberrecht
Notes extern:
This is a preprint of the article first published in:
Neuroreport. - 16 (2005), 1, pp. 13 - 16
ISSN (print) 0959-4965
ISSN (online) 1473-558X
It is not the final version published by
Lippincott, Williams & Wilkins.