The effect of crowding on orientation-selective adaptation in human   early visual cortex

doi:10.1167/9.11.13

CORC > 北京大学 > 心理与认知科学学院

	The effect of crowding on orientation-selective adaptation in human early visual cortex
	Bi, Taiyong ; Cai, Peng ; Zhou, Tiangang ; Fang, Fang
刊名	journal of vision
	2009
关键词	adaptation contrast crowding fMRI orientation visual cortex CONTRAST FOLLOWING ADAPTATION ATTENTIONAL RESOLUTION CORTICAL MAGNIFICATION SPATIAL INTERACTION OBJECT RECOGNITION RESPONSE FUNCTIONS ACUITY AREAS ORGANIZATION THRESHOLDS
DOI	10.1167/9.11.13
英文摘要	Crowding is the identification difficulty for a target in the presence of nearby flankers. Based on psychophysical findings, many theories have been proposed to explain crowding at multiple levels. However, little is known about its neural mechanism. In this study, we combined psychophysical and fMRI adaptation techniques to search for the cortical locus of crowding. In the psychophysical experiment, when subjects' attention was controlled, we found that the threshold elevation aftereffect (TEAE) was not affected by crowding, regardless of the contrast level of adapting stimulus. In the fMRI experiment, the orientation-selective fMRI adaptation in V1 was not affected by crowding either. However, downstream from V1, we found that crowding weakened the adaptation effect in V2 and V3. Our results demonstrate that crowding occurs beyond V1 and provide one of the first pieces of direct evidence supporting the two-stage model of crowding (D. M. Levi, 2008).; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000273280700013&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Ophthalmology; SCI(E); PubMed; 23; ARTICLE; 11; 13.1-10; 9
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/323437]
专题	心理与认知科学学院
推荐引用方式 GB/T 7714	Bi, Taiyong,Cai, Peng,Zhou, Tiangang,et al. The effect of crowding on orientation-selective adaptation in human early visual cortex[J]. journal of vision,2009.
APA	Bi, Taiyong,Cai, Peng,Zhou, Tiangang,&Fang, Fang.(2009).The effect of crowding on orientation-selective adaptation in human early visual cortex.journal of vision.
MLA	Bi, Taiyong,et al."The effect of crowding on orientation-selective adaptation in human early visual cortex".journal of vision (2009).