Coding of visual patterns and textures in monkey inferior temporal cortex.
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.
Wang
Yi
Y
Graduate School of Engineering Science, Department of Cognitive Neuroscience, Osaka University Medical School, Suita, Osaka 565-0871, Japan. yi.wang@uth.tmc.edu
Fujita
Ichiro
I
Murayama
Yusuke
Y
D000818:Animals; D001640:Bicuculline / Q000008:administration & dosage / Q000031:analogs & derivatives*; D015350:Contrast Sensitivity / Q000502:physiology*; D058787:GABA-A Receptor Antagonists; D007478:Iontophoresis; D008251:Macaca; D009433:Neural Inhibition / Q000187:drug effects / Q000502:physiology; D009474:Neurons / Q000187:drug effects / Q000502:physiology; D013702:Temporal Lobe / Q000187:drug effects / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*; D005680:gamma-Aminobutyric Acid / Q000502:physiology
D058787:GABA-A Receptor Antagonists; C017069:bicuculline methiodide; D005680:gamma-Aminobutyric Acid; D001640:Bicuculline