Contour Integration over Time: Psychophysical and fMRI Evidence

doi:10.1093/cercor/bhw147

CORC > 北京大学 > 生命科学学院

	Contour Integration over Time: Psychophysical and fMRI Evidence
	Kuai, Shu-Guang ; Li, Wu ; Yu, Cong ; Kourtzi, Zoe
刊名	CEREBRAL CORTEX
	2017
关键词	contour integration fMRI Gestalt principles good continuity psychophysics PRIMARY VISUAL-CORTEX SHORT-TERM-MEMORY LATERAL OCCIPITAL COMPLEX PARIETAL CORTEX GLOBAL SHAPES HUMAN BRAIN AREAS PERCEPTION INFORMATION DYNAMICS
DOI	10.1093/cercor/bhw147
英文摘要	The brain integrates discrete but collinear stimuli to perceive global contours. Previous contour integration (CI) studies mainly focus on integration over space, and CI is attributed to either V1 long-range connections or contour processing in high-visual areas that top-down modulate V1 responses. Here, we show that CI also occurs over time in a design that minimizes the roles of V1 long-range interactions. We use tilted contours embedded in random orientation noise and moving horizontally behind a fixed vertical slit. Individual contour elements traveling up/down within the slit would be encoded over time by parallel, rather than aligned, V1 neurons. However, we find robust contour detection even when the slit permits only one viewable contour element. Similar to CI over space, CI over time also obeys the rule of collinearity. fMRI evidence shows that while CI over space engages visual areas as early as V1, CI over time mainly engages higher dorsal and ventral visual areas involved in shape processing, as well as posterior parietal regions involved in visual memory that can represent the orientation of temporally integrated contours. These results suggest at least partially dissociable mechanisms for implementing the Gestalt rule of continuity in CI over space and time.; European Community [255577]; Biotechnology and Biological Sciences Research Council [D52199X, E027436]; National Natural Science Foundation of China [31230030, 31571160, 91432102]; SCI(E); PubMed; ARTICLE; 5; 3042-3051; 27
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/433541]
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	Kuai, Shu-Guang,Li, Wu,Yu, Cong,et al. Contour Integration over Time: Psychophysical and fMRI Evidence[J]. CEREBRAL CORTEX,2017.
APA	Kuai, Shu-Guang,Li, Wu,Yu, Cong,&Kourtzi, Zoe.(2017).Contour Integration over Time: Psychophysical and fMRI Evidence.CEREBRAL CORTEX.
MLA	Kuai, Shu-Guang,et al."Contour Integration over Time: Psychophysical and fMRI Evidence".CEREBRAL CORTEX (2017).