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Cerebral Cortex Advance Access published online on September 30, 2004
Cerebral Cortex, doi:10.1093/cercor/bhh189
© 2004 by Oxford University Press
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Article

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

Anita D. Barber 1* and Cameron S. Carter 2

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

* To whom correspondence should be addressed. E-mail: adbarber{at}pitt.edu.


  Abstract

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.

Keywords: frontal; parietal; task switching; conflict effect; preparation.
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