| Disentangling the prefrontal network for rule selection by means of a non-verbal variant of the Wisconsin Card Sorting Test. | |
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MedLine Citation:
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PMID: 18729079 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study disentangles the prefrontal network underlying executive functions involved in the Wisconsin Card Sorting Test (WCST). During the WCST, subjects have to perform two key processes: first, they have to derive the correct sorting rule for each trial by trial-and-error, and, second, they have to detect when this sorting rule is changed by the investigator. Both cognitive processes constitute key components of the executive system, which is subserved by the prefrontal cortex. For the current fMRI experiment, we developed a non-verbal variant of the WCST. Subjects were instructed either to respond according to a given sorting rule or to detect the correct sorting rule, like in the original version of the WCST. Data were obtained from 14 healthy male volunteers and analysed using SPM and a random effects model. All conditions activated a fronto-parietal network, which was generally more active when subjects had to search for the correct sorting rule than when the rule was announced beforehand. Significant differences between these two conditions were seen in the dorsolateral prefrontal cortex (PFC) and the parietal lobe. In addition, the data provided new evidence for the assumption of differentiated roles of the left and right prefrontal cortex. Although the right PFC showed a general involvement in response selection and the execution of goal directed responses, based on given rules, the left PFC was only activated when inductive reasoning and feedback integration was required. |
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Authors:
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Karsten Specht; Chuh-Hyoun Lie; Nadim Jon Shah; Gereon R Fink |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Human brain mapping Volume: 30 ISSN: 1097-0193 ISO Abbreviation: Hum Brain Mapp Publication Date: 2009 May |
Date Detail:
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Created Date: 2009-04-20 Completed Date: 2009-07-02 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9419065 Medline TA: Hum Brain Mapp Country: United States |
Other Details:
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Languages: eng Pagination: 1734-43 Citation Subset: IM |
Copyright Information:
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(c) 2008 Wiley-Liss, Inc. |
Affiliation:
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Department of Biological and Medical Psychology, University of Bergen, Jonas Lies vei 91, Bergen, Norway. karsten.specht@psybp.uib.no |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Brain Mapping* Functional Laterality / physiology Humans Image Processing, Computer-Assisted / methods Magnetic Resonance Imaging / methods Male Neural Pathways / blood supply, physiology* Neuropsychological Tests* Oxygen / blood Prefrontal Cortex / blood supply, physiology* Problem Solving / physiology* Young Adult |
| Chemical | |
Reg. No./Substance:
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7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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