Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/7315

Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Neural mechanisms of transient and sustained cognitive control during task switching
Authors: Braver, Todd S
Reynolds, Jeremy R
Donaldson, David
Contact Email: d.i.donaldson@stir.ac.uk
Issue Date: 14-Aug-2003
Publisher: Cell Press
Citation: Braver TS, Reynolds JR & Donaldson D (2003) Neural mechanisms of transient and sustained cognitive control during task switching, Neuron, 39 (4), pp. 713-726.
Abstract: A hybrid blocked and event-related functional magnetic resonance imaging (fMRI) study decomposed brain activity during task switching into sustained and transient components. Contrasting task-switching blocks against single-task blocks revealed sustained activation in right anterior prefrontal cortex (PFC). Contrasting task-switch trials against task-repeat and single-task trials revealed activation in left lateral PFC and left superior parietal cortex. In both sets of regions, activation dynamics were strongly modulated by trial-by- trial fluctuations in response speed. In addition, right anterior PFC activity selectively covaried with the magnitude of mixing cost (i.e., task-repeat versus single-task trial performance), and left superior parietal activity selectively covaried with the magnitude of the switching cost (i.e., task-switch versus task-repeat trial performance). These results indicate a functional double dissociation in brain regions supporting different components of cognitive control during task switching and suggest that both sustained and transient control processes mediate the behavioral performance costs of task switching.
Type: Journal Article
URI: http://hdl.handle.net/1893/7315
DOI Link: http://dx.doi.org/10.1016/S0896-6273(03)00466-5
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: Washington University In Saint Louis
Washington University In Saint Louis
Psychology

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