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Categorical Representation of Visual Stimuli in the Primate Prefrontal Cortex
David J. Freedman,125Maximilian Riesenhuber,345Tomaso Poggio,345Earl K. Miller125*
The ability to group stimuli into meaningful categories is a
fundamental cognitive process. To explore its neural basis, wetrained
monkeys to categorize computer-generated stimuli as "cats"and
"dogs." A morphing system was used to systematically varystimulus
shape and precisely define the category boundary. Neuralactivity in
the lateral prefrontal cortex reflected the categoryof visual stimuli,
even when a monkey was retrained with the stimuliassigned to new
categories.
1 Center for Learning and Memory,
2 RIKEN-MIT Neuroscience Research Center,
3 Center for Biological and Computational Learning,
4 McGovern Institute for Brain Research,
5 Department of Brain and Cognitive Sciences,
Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
*
To whom correspondence should be addressed. E-mail:
ekm{at}ai.mit.edu
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Simon J. Thorpe and Michèle Fabre-Thorpe (12 January 2001) Science291 (5502), 260.
[DOI: 10.1126/science.1058249] |Summary »|Full Text »
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