Article (Scientific journals)
Regional brain activity during tasks devoted to the central executive of working memory
Collette, Fabienne; Salmon, Eric; Van der Linden, Martial et al.
1999In Cognitive Brain Research, 7 (3), p. 411-417
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Keywords :
Working memory; Central executive; PET
Abstract :
[en] Most previous PET studies investigating the central executive (CE) component of working memory found activation in the prefrontal cortex. However, the tasks used did not always permit to distinguish precisely the functions of the CE from the storage function of the slave systems. The aim of the present study was to isolate brain areas that subserve manipulation of information by the CE when the influence of storage function was removed. A PET activation study was performed with four cognitive tasks, crossing conditions of temporary storage and manipulation of information. The manipulation of information induced an activation in the right (BA 10/46) and left (BA 9/6) middle frontal gyrus and in the left parietal area (BA7). The interaction between the storage and manipulation conditions did not reveal any significant changes in activation. These results are in agreement with the hypothesis that CE functions are distributed between anterior and posterior brain areas, but could also reflect a simultaneous involvement of controlled (frontal) and automatic (parietal) attentional systems. In the other hand, the absence of interaction between the storage and manipulation conditions demonstrates that the CE is not necessarily related to the presence of a memory load.
Research center :
GIGA CRC (Cyclotron Research Center) In vivo Imaging-Aging & Memory - ULiège
Disciplines :
Neurosciences & behavior
Author, co-author :
Collette, Fabienne  ;  Université de Liège - ULiège > Département des sciences cognitives > Neuropsychologie
Salmon, Eric  ;  Université de Liège - ULiège > Département des sciences cliniques > Neuroimagerie des troubles de la mémoire et révalid. cogn.
Van der Linden, Martial ;  Université de Liège - ULiège > Département des sciences cognitives > Psychopathologie cognitive
Chicherio, Christian
Belleville, Sylvie
Degueldre, Christian ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Delfiore, Guy
Franck, Georges ;  Université de Liège - ULiège > Relations académiques et scientifiques (Médecine)
Language :
English
Title :
Regional brain activity during tasks devoted to the central executive of working memory
Publication date :
January 1999
Journal title :
Cognitive Brain Research
ISSN :
0926-6410
Publisher :
Elsevier
Volume :
7
Issue :
3
Pages :
411-417
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 17 September 2009

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