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Titolo:
Interhemispheric asymmetry of EEG alpha activity at rest and during the Wisconsin Card Sorting Test: relations with performance
Autore:
Cicek, M; Nalcaci, E;
Indirizzi:
Ankara Univ, Fac Med, Dept Physiol, Cognit Neurophysiol Unit, TR-06100 Ankara, Turkey Ankara Univ Ankara Turkey TR-06100 physiol Unit, TR-06100 Ankara, Turkey
Titolo Testata:
BIOLOGICAL PSYCHOLOGY
fascicolo: 1, volume: 58, anno: 2001,
pagine: 75 - 88
SICI:
0301-0511(200109)58:1<75:IAOEAA>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
LATERALIZED COGNITIVE-PROCESSES; CEREBRAL BLOOD-FLOW; WORKING-MEMORY; HEMISPHERIC-ASYMMETRY; BRAIN; ELECTROENCEPHALOGRAM; ACTIVATION; HUMANS; DYNAMICS; CORTEX;
Keywords:
prefrontal cortex; cerebral laterality; EEG; alpha band; Wisconsin Card Sorting Test (WCST);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Citazioni:
52
Recensione:
Indirizzi per estratti:
Indirizzo: Cicek, M Ankara Univ, Fac Med, Dept Physiol, Cognit Neurophysiol Unit, TR-06100 Ankara, Turkey Ankara Univ Ankara Turkey TR-06100 nit, TR-06100 Ankara, Turkey
Citazione:
M. Cicek e E. Nalcaci, "Interhemispheric asymmetry of EEG alpha activity at rest and during the Wisconsin Card Sorting Test: relations with performance", BIOL PSYCH, 58(1), 2001, pp. 75-88

Abstract

There are conflicting results regarding the functional asymmetry of the prefrontal cortex. Spectral power analysis of electro encephalo graphic (EEG)activity can provide important clues about the cortical mechanisms. In this study, interhemispheric EEG alpha power asymmetry of healthy individuals was investigated during the execution of the Wisconsin Card Sorting Test (WCST) and during rest. We analyzed alpha-1 (8.6-10.2 Hz) and alpha-2 (10.9-12.5 Hz) bands separately and found some evidence to indicate that lower andupper alpha bands reflect different cortical processes. On the other hand,greater alpha power during resting correlated with higher performance on the WCST. The lower left frontal alpha power during WCST correlated significantly with the higher WCST performance. However, greater bilateral parietalalpha power during WCST correlated with higher performance. Significant correlations between EEG activity and WCST performance were, in general, restricted to lower alpha power, both at rest and during the task. These findings are discussed with regard to attention processes reflected by lower alpha activity. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 11/07/20 alle ore 11:03:34