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  Processing of perceived visual shape in the human lateral occipital complex

Kourtzi, Z. (2001). Processing of perceived visual shape in the human lateral occipital complex. Talk presented at Twenty-fourth European Conference on Visual Perception (ECVP 2001). Kusadasi, Turkey. 2001-08-26 - 2001-08-30.

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Kourtzi, Z1, 2, 3, Author              
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1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497798              
3Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: The human lateral occipital complex (LOC) has been implicated in visual recognition. Does the LOC represent higher-level shape information rather than low-level image features? To address this question event-related fMRI adaptation was used in which lower neural responses were observed for two identical than two different consecutively presented stimuli. Adaptation across a change between two stimuli implicates a common neural representation invariant to that change. A set of studies with stereoscopically defined displays showed that the sameness of perceived shape rather than of low-level contours is necessary and sufficient for adaptation in the LOC. These results indicate that the LOC represents perceived shape rather than low-level features of objects. Further studies addressed the question how abstract these shape representations are by testing for adaptation in the LOC across changes in the 3-D structure of objects. In particular, these studies tested adaptation (a) across rotations and changes in the 3-D configuration of objects, and (b) between 3-D shapes defined by binocular (ie stereo) or monocular (ie shading) depth cues and 2-D silhouettes of the same objects.

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 Dates: 2001-08
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: Kourtzi2001
DOI: 10.1177/03010066010300S101
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Title: Twenty-fourth European Conference on Visual Perception (ECVP 2001)
Place of Event: Kusadasi, Turkey
Start-/End Date: 2001-08-26 - 2001-08-30

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Title: Perception
Source Genre: Journal
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Publ. Info: London : Pion Ltd.
Pages: - Volume / Issue: 30 (ECVP Abstract Supplement) Sequence Number: - Start / End Page: 11 Identifier: ISSN: 0301-0066
CoNE: https://pure.mpg.de/cone/journals/resource/954925509369