MANY cells in prefrontal cortex show enhanced activity prior to movement onset in delayed or memory-guided saccade tasks. This activity is a possible neural correlate of spatial attention and working memory. The goal of this study was to determine whether delay activity is evoked when non-spatial cues such as color are used to guide saccades. Monkeys were trained on a saccade target selection task in which they were cued for either the location or color of the rewarded target. When the location of the target was specified explicitly, many cells showed visual responses and delay activity that were spatially selective. Color selective visual responses or delay activity were both rare and weak. However, for many cells, spatially selective delay activity could be evoked when color was used to specify the location of the target. These results indicate that color is capable of eliciting spatially selective activity from cells that have no overt color selectivity. (C) 1999 Lippincott Williams & Wilkins.
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Med Univ Vienna, Div Cognit Neurobiol, Ctr Brain Res, Vienna, Austria
Columbia Univ, Dept Physiol, Zuckerman Mind Brain Behav Inst, New York, NY 10027 USA
Columbia Univ, Dept Neurosci, Zuckerman Mind Brain Behav Inst, New York, NY 10027 USAMed Univ Vienna, Div Cognit Neurobiol, Ctr Brain Res, Vienna, Austria
Passecker, Johannes
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Mikus, Nace
Malagon-Vina, Hugo
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Med Univ Vienna, Div Cognit Neurobiol, Ctr Brain Res, Vienna, AustriaMed Univ Vienna, Div Cognit Neurobiol, Ctr Brain Res, Vienna, Austria
Malagon-Vina, Hugo
Anner, Philip
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Med Univ Vienna, Div Cognit Neurobiol, Ctr Brain Res, Vienna, Austria
Med Univ Vienna, Ctr Med Stat Informat & Intelligent Syst, Vienna, AustriaMed Univ Vienna, Div Cognit Neurobiol, Ctr Brain Res, Vienna, Austria
Anner, Philip
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Dimidschstein, Jordane
Fishell, Gordon
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NYU, Sch Med, Inst Neurosci, New York, NY USA
Harvard Med Sch, Dept Neurobiol, Boston, MA USA
Broad, Stanley Ctr, Cambridge, MA USAMed Univ Vienna, Div Cognit Neurobiol, Ctr Brain Res, Vienna, Austria
Fishell, Gordon
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Dorffner, Georg
Klausberger, Thomas
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Med Univ Vienna, Div Cognit Neurobiol, Ctr Brain Res, Vienna, AustriaMed Univ Vienna, Div Cognit Neurobiol, Ctr Brain Res, Vienna, Austria