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Title: Equivalent Representation of Real and Illusory Contours in Macaque V4
Author: Pan, YX ; Chen, MG ; Yin, JP ; An, X ; Zhang, X ; Lu, YL ; Gong, HL ; Li, W ; Wang, W
Source: JOURNAL OF NEUROSCIENCE
Issued Date: 2012
Volume: 32, Issue:20, Pages:6760-6770
Keyword: MONKEY VISUAL-CORTEX ; INFERIOR TEMPORAL CORTEX ; EXTRASTRIATE AREA V4 ; SHAPE SELECTIVITY ; FUNCTIONAL ARCHITECTURE ; MODULAR ORGANIZATION ; SUBJECTIVE CONTOURS ; RECEPTIVE-FIELDS ; STRIATE CORTEX ; ORIENTATION DISCRIMINATION
Subject: Neurosciences & Neurology
Corresponding Author: Wang, W (reprint author), Mailbox 9,320 Yueyang Rd, Shanghai 200031, Peoples R China.,w.wang@ion.ac.cn
English Abstract: The cortical processing of illusory contours provides a unique window for exploring the brain mechanisms underlying visual perception. Previous electrophysiological single-cell recordings demonstrate that a subgroup of cells in macaque V1 and V2 signal the presence of illusory contours, whereas recent human brain imaging studies reveal higher-order visual cortices playing a central role in illusory figure processing. It seems that the processing of illusory contours/figures may engage multiple cortical interactions between hierarchically organized processing stages in the ventral visual pathway of primates. However, it is not yet known in which brain areas illusory contours are represented in the same manner as real contours at both the population and single-cell levels. Here, by combining intrinsic optical imaging in anesthetized rhesus macaques with single-cell recordings in awake ones, we found a complete overlap of orientation domains in visual cortical area V4 for processing real and illusory contours. In contrast, the orientation domains mapped in early visual areas V1 and V2 mainly encoded the local physical stimulus features inducing the subjective perception of global illusory contours. Our results indicate that real and illusory contours are encoded equivalently by the same functional domains in V4, suggesting that V4 is a key cortical locus for integration of local features into global contours.
Indexed Type: sci
Language: 英语
Content Type: 期刊论文
URI: http://ir.sibs.ac.cn/handle/331001/2480
Appears in Collections:神经所(总)_期刊论文

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Pan, YX; Chen, MG; Yin, JP; An, X; Zhang, X; Lu, YL; Gong, HL; Li, W; Wang, W.Equivalent Representation of Real and Illusory Contours in Macaque V4,JOURNAL OF NEUROSCIENCE,2012,32(20):6760-6770
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