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J Neurophysiol 98: 1415-1427, 2007. First published June 27, 2007; doi:10.1152/jn.00238.2007
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Brain Areas Selective for Both Observed and Executed Movements

Ilan Dinstein1, Uri Hasson1, Nava Rubin1 and David J. Heeger2,1

1Center for Neural Science and 2Department of Psychology, New York University, New York, New York

Submitted 5 March 2007; accepted in final form 27 June 2007

When observing a particular movement a subset of movement-selective visual and visuomotor neurons are active in the observer's brain, forming a representation of the observed movement. Similarly, when executing a movement a subset of movement-selective motor and visuomotor neurons are active, forming a representation of the executed movement. In this study we used an fMRI-adaptation protocol to assess cortical response selectivity to observed and executed movements simultaneously. Subjects freely played the rock–paper–scissors game against a videotaped opponent, sometimes repeatedly observing or executing the same movement on subsequent trials. Numerous brain areas exhibited adaptation (repetition suppression) during either repeated observations or repeated executions of the same movement. A subset of areas exhibited an overlap of both effects, containing neurons with selective responses for both executed and observed movements. We describe the function of these movement representation areas in the context of the human mirror system, which is expected to respond selectively to both observed and executed movements.

Address for reprint requests and other correspondence: I. Dinstein, Center for Neural Science, New York University, 4 Washington Place, New York, NY 10003 (E-mail: ilan{at}cns.nyu.edu)




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