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J Neurophysiol 95: 3281-3285, 2006. First published January 18, 2006; doi:10.1152/jn.01011.2005
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Neuronal Activity Related to Elapsed Time in Prefrontal Cortex

Aldo Genovesio, Satoshi Tsujimoto and Steven P. Wise

Laboratory of Systems Neuroscience, National Institute of Mental Health, Bethesda, Maryland

Submitted 28 September 2005; accepted in final form 11 January 2006

We studied prefrontal cortex activity during a saccade task. On each trial, one of three delay periods elapsed between the onset of a visual stimulus and its offset, which triggered a saccade. After stimulus offset, many neurons showed phasic increases in activity that depended on the duration of the preceding delay period. This delay-dependent activity varied only weakly with reaction time and instead appeared to reflect a more general aspect of elapsed time.

Address for reprint requests and other correspondence: Steven P. Wise, Laboratory of Systems Neuroscience, National Institute of Mental Health, Building 49, Room B1EE17, 49 Convent Drive, MSC 4401, Bethesda, MD 20892-4401 (Email: stevenwise{at}mail.nih.gov)




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