Reference : Is brain activity during a Stroop inhibitory task modulated by the kind of cognitive con...
Scientific congresses and symposiums : Unpublished conference
Social & behavioral sciences, psychology : Neurosciences & behavior
Is brain activity during a Stroop inhibitory task modulated by the kind of cognitive control required?
Collette, Fabienne[Université de Liège - ULg > Département de Psychologie : cognition et comportement > Neuropsychologie >]
D'Ostilio, Kevin[Université de Liège - ULg > > Centre de recherches du cyclotron >]
D'Argembeau, Arnaud[Université de Liège - ULg > Département de Psychologie : cognition et comportement > Psychopathologie cognitive >]
Salmon, Eric[Université de Liège - ULg > Département des sciences cliniques > Neuroimagerie des troubles de la mémoire et révalid. cogn. >]
Maquet, Pierre[Université de Liège - ULg > > Centre de recherches du cyclotron >]
Grandjean, Julien[Université de Liège - ULg > Département de Psychologie : cognition et comportement > Neuropsychologie >]
Annual Meeting of the Belgian Association for Psychological Science
27 May 2011
[en] inhibition ; fmri
[en] Performance on the Stroop task is associated to a large antero-posterior cerebral network involving notably the anterior cingulate and dorsolateral prefrontal cortex. In this study, we used a mixed-BOLD-fMRI design (N=25) to determine the neural substrates of inhibitory functioning in a Stroop task according to contextual information. Consequently, two task-contexts were created: (1) congruent context with a majority of facilitator items, (2) non-congruent context with mainly interfering items. Based on the dual cognitive control model, we postulated that the non-congruent blocks will involve proactive control, which is anticipatory, sustained, and involved when a large number of interfering items are successively presented. On the contrary, congruent blocks were assumed to involve reactive control, which occurs when few interfering items are presented, and just after the presentation of these items only. On this basis, we hypothesized that the kind of cognitive control modulates cerebral activity associated to inhibitory functioning.
For behavioral data, we obtained faster response times for interfering items in the non-congruent vs. congruent condition, indicating proactive control specific to the congruent condition only. Functional neuro-imaging data showed an increased transient activity for interfering vs neutral items in a fronto-parietal network more important in the congruent than in the neutral condition. A similar contrast in the non-congruent condition showed no significant brain activity at the statistical threshold used. These data indicate the existence of a modulation of the cerebral areas associated to inhibitory functioning according to the kind of cognitive control necessary to perform the task.
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 6