Non-frontal P3b-like activity evoked by the Wisconsin Card Sorting Test

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Publication Details

Author list: Barceló F
Publisher: Lippincott, Williams & Wilkins
Publication year: 1998
Volume number: 9
Issue number: 4
Start page: 747
End page: 751
Number of pages: 5
ISSN: 0959-4965
Languages: English-Great Britain (EN-GB)


EVENT related potentials (ERP) were recorded from 29 electrode positions in 10 normal subjects while they performed a simplified version of the Wisconsin Card Sorting Test (WCST). The design focused on ERP differences between early and late trials within each WCST series. Topographic and dipole analyses confirmed the reliability of two ERP signs: one conspicuous mid-parietal P3b wave and one asymmetrical frontal-temporal component. A three-dipole model accounted for these ERP signs with >90% accuracy even in individual subjects, and suggests a sub-second activation of temporal-parietal and medial temporal association areas during card sorting. The WCST-related P3b wave is proposed to reflect working memory operations such as template matching and template formation during card sorting.


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Last updated on 2019-13-08 at 00:16