Reference : Exploring the unity and diversity of the neural substrates of executive functioning
Scientific journals : Article
Social & behavioral sciences, psychology : Neurosciences & behavior
Human health sciences : Radiology, nuclear medicine & imaging
http://hdl.handle.net/2268/13403
Exploring the unity and diversity of the neural substrates of executive functioning
English
Collette, Fabienne mailto [Université de Liège - ULg > Département des sciences cognitives > Neuropsychologie >]
Van der Linden, Martial mailto [Université de Liège - ULg > Département des sciences cognitives > Psychopathologie cognitive >]
Laureys, Steven mailto [Université de Liège - ULg > > Centre de recherches du cyclotron]
Delfiore, G. [> > > >]
Degueldre, Christian mailto [Université de Liège - ULg > > Centre de recherches du cyclotron >]
Luxen, André mailto [Université de Liège - ULg > Département de chimie (sciences) > Chimie organique de synthèse - Centre de recherches du cyclotron >]
Salmon, Eric mailto [Université de Liège - ULg > Département des sciences cliniques > Neuroimagerie des troubles de la mémoire et révalid. cogn. >]
Aug-2005
Human Brain Mapping
Wiley Liss, Inc.
25
4
409-423
Yes (verified by ORBi)
International
1065-9471
Hoboken
[en] executive functions ; positron emission tomography (PET) ; parietal ; prefrontal
[fr] fonctions executives ; imagerie cérébrale fonctionnelle ; lobes frontaux
[en] Previous studies exploring the neural substrates of executive functioning used task-specific analyses, which might not be the most appropriate approach due to the difficulty of precisely isolating executive functions. Consequently, the aim of this study was to use positron emission tomography (PET) to reexamine by conjunction and interaction paradigms the cerebral areas associated with three executive processes (updating, shifting, and inhibition). Three conjunction analyses allowed us to isolate the cerebral areas common to tasks selected to tap into the same executive process. A global conjunction analysis demonstrated that foci of activation common to all tasks were observed in the right intraparietal sulcus, the left superior parietal gyrus, and at a lower statistical threshold, the left lateral prefrontal cortex. These regions thus seem to play a general role in executive functioning. The right intraparietal sulcus seems to play a role in selective attention to relevant stimuli and in suppression of irrelevant information. The left superior parietal region is involved in amodal switching/integration processes. One hypothesis regarding the functional role of the lateral prefrontal cortex is that monitoring and temporal organization of cognitive processes are necessary to carry out ongoing tasks. Finally, interaction analyses showed that specific prefrontal cerebral areas were associated with each executive process. The results of this neuro-imaging study are in agreement with cognitive studies demonstrating that executive functioning is characterized by both unity and diversity of processes.
Centre de Recherches du Cyclotron - CRC ; Centre de Neur
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Researchers
http://hdl.handle.net/2268/13403
10.1002/hbm.20118

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