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Texture discriminability in monkey inferotemporal cortex predicts human texture perception

Zhivago, Kalathupiriyan A and Arun, Sripati P (2014) Texture discriminability in monkey inferotemporal cortex predicts human texture perception. In: JOURNAL OF NEUROPHYSIOLOGY, 112 (11). pp. 2745-2755.

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Official URL: http://dx.doi.org/ 10.1152/jn.00532.2014

Abstract

Shape and texture are both important properties of visual objects, but texture is relatively less understood. Here, we characterized neuronal responses to discrete textures in monkey inferotemporal (IT) cortex and asked whether they can explain classic findings in human texture perception. We focused on three classic findings on texture discrimination: 1) it can be easy or hard depending on the constituent elements; 2) it can have asymmetries, and 3) it is reduced for textures with randomly oriented elements. We recorded neuronal activity from monkey inferotemporal (IT) cortex and measured texture perception in humans for a variety of textures. Our main findings are as follows: 1) IT neurons show congruent selectivity for textures across array size; 2) textures that were easy for humans to discriminate also elicited distinct patterns of neuronal activity in monkey IT; 3) texture pairs with asymmetries in humans also exhibited asymmetric variation in firing rate across monkey IT; and 4) neuronal responses to randomly oriented textures were explained by an average of responses to homogeneous textures, which rendered them less discriminable. The reduction in discriminability of monkey IT neurons predicted the reduced discriminability in humans during texture discrimination. Taken together, our results suggest that texture perception in humans is likely based on neuronal representations similar to those in monkey IT.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the AMER PHYSIOLOGICAL SOC, 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 USA
Department/Centre: Division of Biological Sciences > Centre for Neuroscience
Depositing User: Id for Latest eprints
Date Deposited: 18 Jan 2015 06:20
Last Modified: 18 Jan 2015 06:20
URI: http://eprints.iisc.ac.in/id/eprint/50682

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