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Abstract

In several areas of the macaque brain, neurons fire during delayed-response tasks at a rate determined by the value of the reward expected at the end of the trial. The activity of these neurons might be related to the value of the expected reward or to the degree of motivation induced by expectation of the reward. We describe results indicating that the nature of reward-dependent activity varies across areas. Neuronal activity in orbitofrontal cortex represents the value of the expected reward, whereas neuronal activity in premotor cortex reflects the degree of motivation.

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We thank K. McCracken for technical assistance and S.-H. Lee for help in training. Supported by NIH grants MH45156, EY11831, EY08098, and P41RR03631.

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Published In

Science
Volume 304 | Issue 5668
9 April 2004

Submission history

Received: 3 November 2003
Accepted: 6 February 2004
Published in print: 9 April 2004

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Notes

Supporting Online Material
www.sciencemag.org/cgi/content/full/304/5668/307/DC1
Materials and Methods
SOM Text
Figs. S1 to S3
Tables S1 and S2

Authors

Affiliations

Matthew R. Roesch*
Center for the Neural Basis of Cognition, Mellon Institute, Room 115, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA, and Department of Neuroscience, University of Pittsburgh, Pittsburgh, PA 15260, USA.
Carl R. Olson
Center for the Neural Basis of Cognition, Mellon Institute, Room 115, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA, and Department of Neuroscience, University of Pittsburgh, Pittsburgh, PA 15260, USA.

Notes

*
To whom correspondence should be addressed. E-mail: [email protected]

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