Document Detail

Right frontal event related EEG coherence (ERCoh) differentiates good from bad performers of the Wisconsin Card Sorting Test (WCST).
MedLine Citation:
PMID:  17540289     Owner:  NLM     Status:  MEDLINE    
AIM: To investigate changes in Event-Related Coherence (ERCoh) associated to good and bad resolution of the Wisconsin Card Sorting Test (WCST). METHODS: Event-Related Potentials (ERPs) were recorded from a sample of 30 university students while they performed a computerized version of the WCST. ERCoh was calculated for frontal and parietal electrodes for two specific moments: immediately before the response and after the feedback cues. RESULTS: Bad performers presented significantly reduced ERCoh at the right frontal region (in alpha, beta-1 and beta-2 bands), while no consistent group differences emerged for parietal ERCoh. Furthermore, the strength of functional coupling (ERCoh) between midfrontal and right-frontal electrodes was a good predictor of WCST behavioural parameters, such as the percentage of perseverative errors or the number of categories achieved. CONCLUSIONS: The results suggest that the right prefrontal cortex is specifically involved in executive functions, such as planning and foresight, tapped by the WCST. Although the specificity of the WCST to explore frontal lesions has been recently questioned, the present findings support that prefrontal areas are specifically involved in the successful resolution of the test by healthy subjects.
M T Carrillo-de-la-Peña; L García-Larrea
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Publication Detail:
Type:  Journal Article     Date:  2007-03-21
Journal Detail:
Title:  Neurophysiologie clinique = Clinical neurophysiology     Volume:  37     ISSN:  0987-7053     ISO Abbreviation:  Neurophysiol Clin     Publication Date:    2007 Apr-May
Date Detail:
Created Date:  2007-06-01     Completed Date:  2007-07-31     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804532     Medline TA:  Neurophysiol Clin     Country:  France    
Other Details:
Languages:  eng     Pagination:  63-75     Citation Subset:  IM    
Department of Clinical Psychology and Psychobiology, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain. <>
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MeSH Terms
Alpha Rhythm
Beta Rhythm
Evoked Potentials / physiology
Frontal Lobe / physiology*
Functional Laterality / physiology
Neuropsychological Tests*
Parietal Lobe / physiology
Prefrontal Cortex / physiology
Psychomotor Performance / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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