Differential activation of the prefrontal cortex in successful and unsuccessful memory retrieval.

Détails

ID Serval
serval:BIB_A3C6FAFB31C1
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Differential activation of the prefrontal cortex in successful and unsuccessful memory retrieval.
Périodique
Brain
Auteur⸱e⸱s
Rugg M.D., Fletcher P.C., Frith C.D., Frackowiak R.S., Dolan R.J.
ISSN
0006-8950 (Print)
ISSN-L
0006-8950
Statut éditorial
Publié
Date de publication
1996
Volume
119 ( Pt 6)
Pages
2073-2083
Langue
anglais
Notes
Publication types: Clinical Trial ; Journal Article ; Research Support, Non-U.S. Gov'tPublication Status: ppublish
Résumé
Six subjects underwent PET scans while they performed three versions of a recognition memory test for words and three versions of a control task. In each memory condition, the subjects discriminated between words presented in a prescan study list and words new to the experiment. During the 30 s scanning interval, the ratio of old and new words was 0:20, 4:16 or 16:4, depending on the experimental condition. Outside this interval, the ratio was 50:50 in all three conditions. The requirement in the control task was to discriminate between two character strings, the ratios of which were also manipulated during the 30 s scanning interval. Employing the control task as a covariate, analysis with statistical parametric mapping revealed that regional cerebral blood flow (rCBF) covaried with increasing density of old items in three regions of prefrontal cortex: right dorsolateral [Brodmann area (BA) 9/46], right medial (BA 32/8) and bilateral frontopolar cortex (BA 10). It is concluded that the prefrontal cortex, especially in the right hemisphere, is more active when a retrieval attempt succeeds than when it fails. This finding is consistent with the idea that the prefrontal cortex supports processes that operate selectively on the products of memory retrieval.
Mots-clé
Adult, Cerebrovascular Circulation, Humans, Male, Memory/physiology, Prefrontal Cortex/physiology, Prefrontal Cortex/radionuclide imaging
Pubmed
Web of science
Open Access
Oui
Création de la notice
16/09/2011 17:04
Dernière modification de la notice
20/08/2019 15:09
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