Brain regions activated by endogenous preparatory set shifting as revealed by fMRI
An ongoing controversy concerns whether executive control mechanisms can actively reconfigure the cognitive system in preparation for switching to a new task set. To address this question, we recorded brain activity from 14 healthy participants, using event-related functional magnetic resonance imag...
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| Veröffentlicht in: | Cognitive, affective, & behavioral neuroscience affective, & behavioral neuroscience, 2006-09, Vol.6 (3), p.175-189 |
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| container_title | Cognitive, affective, & behavioral neuroscience |
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| creator | SLAGTER, H. A WEISSMAN, D. H GIESBRECHT, B KENEMANS, J. L MANGUN, G. R KOK, A WOLDORFF, M. G |
| description | An ongoing controversy concerns whether executive control mechanisms can actively reconfigure the cognitive system in preparation for switching to a new task set. To address this question, we recorded brain activity from 14 healthy participants, using event-related functional magnetic resonance imaging, while they performed a cued attention task. Critically, in any particular trial, the cued task set was either the same as that in the previous trial or switched. As was hypothesized, cue-related, switch-specific preparatory activity was observed in a network of dorsal frontal and parietal brain areas that are typically associated with cognitive control processes. Moreover, the magnitude of switch-specific preparatory activity varied with the number of possible task sets that could be presented in a given trial block. These findings provide compelling support for the existence of top-down, preparatory control processes that enable set switching. Furthermore, they demonstrate that global task structure is a critical determinant of whether switch-specific preparatory activity is observed. |
| doi_str_mv | 10.3758/CABN.6.3.175 |
| format | Article |
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Moreover, the magnitude of switch-specific preparatory activity varied with the number of possible task sets that could be presented in a given trial block. These findings provide compelling support for the existence of top-down, preparatory control processes that enable set switching. Furthermore, they demonstrate that global task structure is a critical determinant of whether switch-specific preparatory activity is observed.</description><identifier>ISSN: 1530-7026</identifier><identifier>EISSN: 1531-135X</identifier><identifier>DOI: 10.3758/CABN.6.3.175</identifier><identifier>PMID: 17243354</identifier><language>eng</language><publisher>Austin, TX: Psychonomic Society</publisher><subject>Adult ; Analysis of Variance ; Anatomical correlates of behavior ; Attention - physiology ; Behavioral psychophysiology ; Biological and medical sciences ; Brain - blood supply ; Brain - physiology ; Brain Mapping ; Cognition - physiology ; Cues ; Female ; Functional Laterality - physiology ; Fundamental and applied biological sciences. Psychology ; Humans ; Image Processing, Computer-Assisted - methods ; Magnetic Resonance Imaging ; Male ; Oxygen - blood ; Photic Stimulation ; Psychology. Psychoanalysis. Psychiatry ; Psychology. 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| subjects | Adult Analysis of Variance Anatomical correlates of behavior Attention - physiology Behavioral psychophysiology Biological and medical sciences Brain - blood supply Brain - physiology Brain Mapping Cognition - physiology Cues Female Functional Laterality - physiology Fundamental and applied biological sciences. Psychology Humans Image Processing, Computer-Assisted - methods Magnetic Resonance Imaging Male Oxygen - blood Photic Stimulation Psychology. Psychoanalysis. Psychiatry Psychology. Psychophysiology Set (Psychology) |
| title | Brain regions activated by endogenous preparatory set shifting as revealed by fMRI |
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