Opposite Modulation of High- and Low-Level Visual Aftereffects by   Perceptual Grouping

doi:10.1016/j.cub.2012.04.026

CORC > 北京大学 > 生命科学学院

	Opposite Modulation of High- and Low-Level Visual Aftereffects by Perceptual Grouping
	He, Dongjun ; Kersten, Daniel ; Fang, Fang
刊名	current biology
	2012
关键词	OBJECT RECOGNITION FORM CONSTRAINTS GLOBAL SHAPES CORTEX ADAPTATION ORGANIZATION FEATURES STATES FMRI
DOI	10.1016/j.cub.2012.04.026
英文摘要	A fundamental task of visual perception is to group visual features-sometimes spatially separated and partially occluded-into coherent, unified representations of objects. Perceptual grouping can vastly simplify the description of a visual scene and is critical for our visual system to understand the three-dimensional visual world. Numerous neurophysiological and brain imaging studies have demonstrated that neural mechanisms of perceptual grouping are characterized by the enhancement of neural responses throughout the visual processing hierarchy, from lower visual areas processing grouped features to higher visual areas representing objects and shapes from grouping [1-3]. In a series of psychophysical adaptation experiments, we made the counterintuitive observation that perceptual grouping amplified the shape aftereffect but meanwhile, reduced the tilt aftereffect and the threshold elevation aftereffect (TEAE). Furthermore, the modulation of perceptual grouping on the TEAE showed a partial interocular transfer. This finding suggests a 2-fold effect of perceptual grouping-enhancing the high-level shape representation and attenuating the low-level feature representation even at a monocular level. We propose that this effect is a functional manifestation of a predictive coding scheme [4-8] and reflects an efficient code of visual information across lower and higher visual cortical areas.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000305034900029&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Biochemistry & Molecular Biology; Cell Biology; SCI(E); PubMed; 9; ARTICLE; 11; 1040-1045; 22
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/162800]
专题	生命科学学院心理与认知科学学院
推荐引用方式 GB/T 7714	He, Dongjun,Kersten, Daniel,Fang, Fang. Opposite Modulation of High- and Low-Level Visual Aftereffects by Perceptual Grouping[J]. current biology,2012.
APA	He, Dongjun,Kersten, Daniel,&Fang, Fang.(2012).Opposite Modulation of High- and Low-Level Visual Aftereffects by Perceptual Grouping.current biology.
MLA	He, Dongjun,et al."Opposite Modulation of High- and Low-Level Visual Aftereffects by Perceptual Grouping".current biology (2012).