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Science 16 January 2004:
Vol. 303. no. 5656, pp. 380 - 383
DOI: 10.1126/science.1087788
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Reports

Differential Representation of Perception and Action in the Frontal Cortex

Andrew B. Schwartz,1* Daniel W. Moran,2 G. Anthony Reina1

A motor illusion was created to separate human subjects' perception of arm movement from their actual movement during figure drawing. Trajectories constructed from cortical activity recorded in monkeys performing the same task showed that the actual movement was represented in the primary motor cortex, whereas the visualized, presumably perceived, trajectories were found in the ventral premotor cortex. Perception and action representations can be differentially recognized in the brain and may be contained in separate structures.

1 Department of Neurobiology, University of Pittsburgh, 3025 East Carson Street, Pittsburgh, PA 15203, USA.
2 Departments of Biomedical Engineering and Neurobiology, Washington University, St. Louis, MO 63130, USA.

* To whom correspondence should be addressed. E-mail: abs21{at}pitt.edu

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