Effects of surface cues on macaque inferior temporal cortical responses

G. Kovács, G. Sáry, K. Köteles, Z. Chadaide, T. Tompa, R. Vogels, G. Benedek

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Humans are able to recognize objects when surface details, such as colour, texture and luminance gradients, are not available. By systematically eliminating colour, texture, shading, contrast and inner contours from given objects, we tested whether certain shape-selective inferior temporal cortex (IT) neurons of awake rhesus monkeys remain selective for these objects as the surface information is reduced. In psychophysical experiments, we established that the rhesus monkey can identify the shape of a coloured object largely independently of its surface characteristics and, to a lesser degree, of its inner contours. Shape selectivity of the neurons does not change when texture and shading are concealed. The responsiveness of the neurons is also affected by the removal of these surface attributes. The IT neurons were found to respond highly similarly to objects brighter or darker than their background. Selectivity for shape is preserved when the contrast is reversed. Deletion of the inner contours, outlining the main parts of the objects, did not affect the responses and selectivity of the IT neurons. These findings indicate that the IT can contribute to the invariant perception of objects having different surface details.

Original languageEnglish
Pages (from-to)178-188
Number of pages11
JournalCerebral Cortex
Volume13
Issue number2
DOIs
Publication statusPublished - Feb 1 2003

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Macaca
Cues
Temporal Lobe
Neurons
Macaca mulatta
Color

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Effects of surface cues on macaque inferior temporal cortical responses. / Kovács, G.; Sáry, G.; Köteles, K.; Chadaide, Z.; Tompa, T.; Vogels, R.; Benedek, G.

In: Cerebral Cortex, Vol. 13, No. 2, 01.02.2003, p. 178-188.

Research output: Contribution to journalArticle

Kovács, G. ; Sáry, G. ; Köteles, K. ; Chadaide, Z. ; Tompa, T. ; Vogels, R. ; Benedek, G. / Effects of surface cues on macaque inferior temporal cortical responses. In: Cerebral Cortex. 2003 ; Vol. 13, No. 2. pp. 178-188.
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