Chapter

Objects and Faces

Nigel Daw

in How Vision Works

Published in print January 2012 | ISBN: 9780199751617
Published online May 2012 | e-ISBN: 9780199932375 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199751617.003.0007
Objects and Faces

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Objects are defined by their edges, with components analyzed in V1, and more complete aspects of the object in V4, projecting to inferotemporal cortex. The response can result from lightness differences, texture differences, or depth differences. Thus, the system can recognize a cartoon just as well as a painting. Moreover, an object may be recognized even if part of it is obscured by another object. Particularly important to interactions with other people and animals are faces, and several areas in occipitotemporal cortex are devoted to them, particularly an area in the fusiform gyrus called the fusiform face area. Although cells at higher levels of the system respond to more specific objects, even at the highest level the response is found in a number of columns; that is, there is distributed coding of object perception.

Keywords: objects; faces; v1; v4; inferotemporal cortex; fusiform face area; distributed coding

Chapter.  10608 words.  Illustrated.

Subjects: Neuropsychology

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