Article (Scientific journals)
Neural substrates of cognitive switching and inhibition in a face processing task.
Piguet, Camille; Sterpenich, Virginie; Desseilles, Martin et al.
2013In NeuroImage, 82, p. 489-99
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Keywords :
Adult; Brain/physiology; Brain Mapping; Cognition/physiology; Emotions/physiology; Face; Facial Expression; Female; Humans; Image Processing, Computer-Assisted; Inhibition (Psychology); Magnetic Resonance Imaging; Male; Photic Stimulation; Young Adult; Emotional faces; Inhibition; Task-switching; fMRI
Abstract :
[en] We frequently need to change our current occupation, an operation requiring additional effortful cognitive demands. Switching from one task to another may involve two distinct processes: inhibition of the previously relevant task-set, and initiation of a new one. Here we tested whether these two processes are underpinned by separate neural substrates, and whether they differ depending on the nature of the task and the emotional content of stimuli. We used functional magnetic resonance imaging in healthy human volunteers who categorize emotional faces according to three different judgment rules (color, gender, or emotional expression). Our paradigm allowed us to separate neural activity associated with inhibition and switching based on the sequence of the tasks required on successive trials. We found that the bilateral medial superior parietal lobule and left intraparietal sulcus showed consistent activation during switching regardless of the task. On the other hand, no common region was activated (or suppressed) as a consequence of inhibition across all tasks. Rather, task-specific effects were observed in brain regions that were more activated when switching to a particular task but less activated after inhibition of the same task. In addition, compared to other conditions, the emotional task elicited a similar switching cost but lower inhibition cost, accompanied by selective decrease in the anterior cingulate cortex when returning to this task shortly after inhibiting it. These results demonstrate that switching relies on domain-general processes mediated by postero-medial parietal areas, engaged across all tasks, but also provide novel evidence that task inhibition produces domain-specific decreases as a function of particular task demands, with only the latter inhibition component being modulated by emotional information.
Disciplines :
Psychiatry
Author, co-author :
Piguet, Camille
Sterpenich, Virginie
Desseilles, Martin ;  Université de Liège - ULiège
Cojan, Yann
Bertschy, Gilles
Vuilleumier, Patrik
Language :
English
Title :
Neural substrates of cognitive switching and inhibition in a face processing task.
Publication date :
2013
Journal title :
NeuroImage
ISSN :
1053-8119
eISSN :
1095-9572
Publisher :
Elsevier, Amsterdam, Netherlands
Volume :
82
Pages :
489-99
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright (c) 2013 Elsevier Inc. All rights reserved.
Available on ORBi :
since 14 January 2016

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