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| Research article summary (published 30 Dec 2001): |
Modulation of gamma-band spectral power by cognitive task complexity.
Full Abstract
This study evaluated the utility of electroencephalographic (EEG) measures as indices of regional cerebral activation during performance of visuo-semantic analysis tasks in neurologically intact adult volunteers. EEG was recorded from 28 scalp locations as participants performed three visual discrimination tasks designed to tap into increasingly more complex operations regularly involved in the recognition of living animate objects. In addition, data from a control task involving the same stimuli, but requiring no cognitive decision or response, was included. EEG records were quantified using power spectrum measures in five frequency bands (delta, theta, alpha, beta, and gamma). Results showed a significant linear increase in absolute power in the gamma band with increasing task complexity over left hemisphere frontal and occipital regions, and over right temporoparietal regions.
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Author information
Author/s: Simos, Panagiotis G (PG); Papanikolaou, Elias (E); Sakkalis, Evangelos (E); Micheloyannis, Sifis (S);
Affiliation: Department of Neurosurgery, The University of Texas, Health Science Center, Houston 77030, USA. psimos(-atsign-)uth.tmc.edu
Journal and publication information
Publication Type: Journal Article
Journal: Brain topography (Brain Topogr), published in United States. (Language: eng)
Reference: 2002-; vol 14 (issue 3) : pp 191-6
Dates: Created 2002/05/10; Completed 2002/10/18; Revised 2004/11/17;
PMID: 12002349, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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