Format

Send to

Choose Destination
See comment in PubMed Commons below
PLoS One. 2010 Sep 2;5(9). pii: e12514. doi: 10.1371/journal.pone.0012514.

Temporo-spatial dynamics of event-related EEG beta activity during the initial contingent negative variation.

Author information

1
Chair of Differential and Personality Psychology, Department of Psychology, Technical University Dresden, Dresden, Germany. thomas.fischer@tu-dresden.de

Abstract

In the electroencephalogram (EEG), early anticipatory processes are accompanied by a slow negative potential, the initial contingent negative variation (iCNV), occurring between 500 and 1500 ms after cue onset over prefrontal cortical regions in tasks with cue-target intervals of about 3 s or longer. However, the temporal sequence of the distributed cortical activity contributing to iCNV generation remains unclear. During iCNV generation, selectively enhanced low-beta activity has been reported. Here we studied the temporal order of activation foci in cortical regions assumed to underlie iCNV generation using source reconstruction of low-beta (13-18 Hz) activity. During the iCNV, elicited by a cued simple reaction-time task, low-beta power peaked first (750 ms after cue onset) in anterior frontal and limbic regions and last (140 ms later) in posterior areas. This activity occurred 3300 ms before target onset and provides evidence for the temporally ordered involvement of both cognitive-control and motor-preparation processes already at early stages during the preparation for speeded action.

PMID:
20824080
PMCID:
PMC2932695
DOI:
10.1371/journal.pone.0012514
[Indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Public Library of Science Icon for PubMed Central
    Loading ...
    Support Center