Reference : Modulation of brain activity during a Stroop inhibitory task by the kind of cognitive co...
Scientific journals : Article
Social & behavioral sciences, psychology : Neurosciences & behavior
http://hdl.handle.net/2268/126587
Modulation of brain activity during a Stroop inhibitory task by the kind of cognitive control required
English
Grandjean, Julien [Université de Liège - ULg > Département de Psychologie : cognition et comportement > Neuropsychologie >]
D'Ostilio, Kevin mailto [Université de Liège - ULg > > Centre de recherches du cyclotron >]
Phillips, Christophe mailto [Université de Liège - ULg > > Centre de recherches du cyclotron >]
Balteau, Evelyne mailto [Université de Liège - ULg > > Centre de recherches du cyclotron >]
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 >]
Maquet, Pierre mailto [Université de Liège - ULg > > 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. >]
Collette, Fabienne mailto [Université de Liège - ULg > Département de Psychologie : cognition et comportement > Neuropsychologie >]
2012
PLoS ONE
Public Library of Science
7
7
e41513
Yes (verified by ORBi)
International
1932-6203
San Franscisco
CA
[en] inhibition ; fonctions exécutives ; fMRI
[en] This study used a proportion congruency manipulation in the Stroop task in order to investigate, at the behavioral and brain substrate levels, the predictions derived from the Dual Mechanisms of Control (DMC) account of two distinct modes of cognitive control depending on the task context. Three experimental conditions were created that varied the proportion congruency: mostly incongruent (MI), mostly congruent (MC), and mostly neutral (MN) contexts. A reactive control strategy, which corresponds to transient interference resolution processes after conflict detection, was expected for the rare conflicting stimuli in the MC context, and a proactive strategy, characterized by a sustained task-relevant focus prior to the occurrence of conflict, was expected in the MI context. Results at the behavioral level supported the proactive/reactive distinction, with the replication of the classic proportion congruent effect (i.e., less interference and facilitation effects in the MI context). fMRI data only partially supported our predictions. Whereas reactive control for incongruent trials in the MC context engaged the expected fronto-parietal network including dorsolateral prefrontal cortex (DLPFC) and anterior cingulate cortex, proactive control in the MI context was not associated with any sustained lateral prefrontal cortex activations, contrary to our hypothesis. Surprisingly, incongruent trials in the MI context elicited transient activation in common with incongruent trials in the MC context, especially in DLPFC, superior parietal lobe, and insula. This lack of sustained activity in MI is discussed in reference to the possible involvement of item-specific rather than list-wide mechanisms of control in the implementation of a high task-relevant focus.
Centre de Recherches du Cyclotron - CRC ; Centre de Neurosciences Cognitives et Comportementales
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; PAI
Researchers
http://hdl.handle.net/2268/126587

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