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| Research article summary (published 29 Sep 2002): |
Stereoscopic illusory contours--cortical neuron responses and human perception.
Full Abstract
In human perception, figure-ground segregation suggests that stereoscopic cues are grouped over wide areas of the visual field. For example, two abutting rectangles of equal luminance and size are seen as a uniform surface when presented at the same depth, but appear as two surfaces separated by an illusory contour and a step in depth when presented with different retinal disparities. Here, we describe neurons in the monkey visual cortex that signal such illusory contours and can be selective for certain figure-ground directions that human observers perceive at these contours. The results suggest that these neurons group stereoscopic cues over distances up to 8 degrees. In addition, we compare these results with human perception and show that the mean stimulus parameters required by these neurons also induce optimal percepts of illusory contours in human observers.
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Author information
Author/s: Heider, Barbara (B); Spillmann, Lothar (L); Peterhans, Esther (E);
Affiliation: Yale University, USA.
Journal and publication information
Publication Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't
Journal: Journal of cognitive neuroscience (J Cogn Neurosci), published in United States. (Language: eng)
Reference: 2002-Oct; vol 14 (issue 7) : pp 1018-29
Dates: Created 2002/11/06; Completed 2002/12/31; Revised 2006/11/15;
PMID: 12419125, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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