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Coding of visual patterns and textures in monkey inferior temporal cortex

Wang, Yi1 3 4 6 CA; Fujita, Ichiro1 2 3 4; Murayama, Yusuke3 5

Vision, Central

Neural coding for texture features of visual objects was investigated in monkey inferior temporal cortex by inactivating intrinsic GABAergic inhibition. The inactivation enabled a substantial number of cells to respond to originally ineffective texture pattern that had a particular feature distinct from the originally effective pattern, or to ineffective texture and non-texture stimuli that possessed a component feature of the originally effective texture. Cells that showed selectivity changes related to a texture feature were often met along a vertical recording track. We suggest that a texture feature is coded by a group of cells which signal different aspects of the texture. The coding occurs at different processing levels, from extracting a particular feature within patterns to detecting complex texture features combined with color and shape of natural objects.

1Division of Biophysical Engineering, Graduate School of Engineering Science

2Graduate School of Frontier Biosciences, Osaka University, Toyonaka, Osaka 560-8531

3Department of Cognitive Neuroscience, Osaka University Medical School, Suita, Osaka 565-0871

4Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Corporation, Toyonaka, Osaka 560-8531, Japan

5Present Address: Max-Planck-Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tübingen, Germany

6Present Address: University of Texas-Houston Medical School, Department of Neurobiology and Anatomy, Houston, TX 77030, USA

CA,6Corresponding Author and Address:

Received 25 June 2002; accepted 6 September 2002

© 2003 Lippincott Williams & Wilkins, Inc.