Neural mechanisms of perceptual grouping in human visual cortex

doi:10.1360/04wc0004

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	Neural mechanisms of perceptual grouping in human visual cortex
	Mao, LH ; Han, SH ; Guo, CY ; Jiang, Y
刊名	科学通报英文版
	2004
关键词	calcarine cortex event-related potential perceptual grouping proximity ATTENTION
DOI	10.1360/04wc0004
英文摘要	The current work examined neural substrates of perceptual grouping in human visual cortex using event-related potential (ERP) recording. Stimulus arrays consisted of local elements that were either evenly spaced (uniform stimuli) or grouped into columns or rows by proximity or color similarity (grouping stimuli). High-density ERPs were recorded while subjects identified orientations of perceptual groups in stimulus arrays that were presented randomly in one of the four quadrants of the visual field. Both uniform and grouping stimulus arrays elicited an early ERP component (C1), which peaked at about 70 ms after stimulus onset and changed its polarity as a function of stimulated elevations. Dipole modeling based on realistic-head boundary-element models revealed generators of the C1 component in the calcarine cortex. The C1 was modulated by perceptual grouping of local elements based on proximity, and this grouping effect was stronger in the upper than in the lower visual field. The findings provide ERP evidence for the engagement of human primary visual cortex in the early stage of perceptual grouping.; Multidisciplinary Sciences; SCI(E); 3; ARTICLE; 8; 819-823; 49
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/255352]
专题	心理与认知科学学院
推荐引用方式 GB/T 7714	Mao, LH,Han, SH,Guo, CY,et al. Neural mechanisms of perceptual grouping in human visual cortex[J]. 科学通报英文版,2004.
APA	Mao, LH,Han, SH,Guo, CY,&Jiang, Y.(2004).Neural mechanisms of perceptual grouping in human visual cortex.科学通报英文版.
MLA	Mao, LH,et al."Neural mechanisms of perceptual grouping in human visual cortex".科学通报英文版 (2004).