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Cortical processing of a brightness illusion.

Content Provider	Semantic Scholar
Author	Roe, Anna W. Lu, Haidong D. Hung, Chou P.
Copyright Year	2005
Abstract	Several brightness illusions indicate that borders can affect the perception of surfaces dramatically. In the Cornsweet illusion, two equiluminant surfaces appear to be different in brightness because of the contrast border between them. Here, we report the existence of cells in monkey visual cortex that respond to such an "illusory" brightness. We find that luminance responsive cells are located in color-activated regions (cytochrome oxidase blobs and bridges) of primary visual cortex (V1), whereas Cornsweet responsive cells are found preferentially in the color-activated regions (thin stripes) of second visual area (V2). This colocalization of brightness and color processing within V1 and V2 suggests a segregation of contour and surface processing in early visual pathways and a hierarchy of brightness information processing from V1 to V2 in monkeys.
Starting Page	98
Ending Page	106
Page Count	9
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.psy.vanderbilt.edu/faculty/roeaw/pdfs/roe05.pdf
Alternate Webpage(s)	http://www.psy.vanderbilt.edu/faculty/roeaw/pdfs/cortproc.pdf
Alternate Webpage(s)	http://www.tsolab.org/jclub/20050418/Roe_05.pdf
PubMed reference number	15738406v1
Volume Number	102
Issue Number	10
Journal	Proceedings of the National Academy of Sciences of the United States of America
Language	English
Access Restriction	Open
Subject Keyword	Area striata structure CYTOCHROME C OXIDASE Cerebral cortex Illusions Visual Pathways brightness
Content Type	Text
Resource Type	Article

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