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Cerebral Cortex Advance Access originally published online on September 30, 2004
Cerebral Cortex 2005 15(7):899-912; doi:10.1093/cercor/bhh189
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Cerebral Cortex V 15 N 7 © Oxford University Press 2004; all rights reserved

Cognitive Control Involved in Overcoming Prepotent Response Tendencies and Switching Between Tasks

Anita D. Barber1,2 and Cameron S. Carter3

1 University of Pittsburgh, Psychology, Pittsburgh, PA 15213, USA, 2 Center for the Neural Basis of Cognition, Pittsburgh, PA 15213, USA and 3 University of California at Davis, Psychiatry and Psychology, Davis, CA 95817, USA

Address correspondence to A.D. Barber, University of Pittsburgh, Psychology, Pittsburgh, PA, USA. Email: adbarber{at}pitt.edu.

A dissociable set of regions was active for the executive processing associated with overcoming a prepotent response tendency and task switching. Regions associated with overcoming prepotency were primarily frontal and may be part of a system involved in top-down biasing for conflict reduction. Posterior regions were recruited for switching between tasks and likely play a role in reconfiguring stimulus–response mappings. Precuneus activity was common to both manipulations and may reflect increased visual attention due to more difficult task demands.

Key Words: frontal • parietal • task switching • conflict effect • preparation


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