Abstract:
: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.
journal_name
Neuroreportjournal_title
Neuroreportauthors
Barceló F,Rubia FJdoi
10.1097/00001756-199803090-00034subject
Has Abstractpub_date
1998-03-09 00:00:00pages
747-51issue
4eissn
0959-4965issn
1473-558Xjournal_volume
9pub_type
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