Contrast-dependent OFF-dominance in cat primary visual cortex facilitates discrimination of stimuli with natural contrast statistics

CORC > 上海神经科学研究所 > 中国科学院上海生命科学研究院神经科学研究所 > 神经所(总)

	Contrast-dependent OFF-dominance in cat primary visual cortex facilitates discrimination of stimuli with natural contrast statistics
	Liu, KF ; Yao, HS
刊名	EUROPEAN JOURNAL OF NEUROSCIENCE
	2014
卷号	39 期号:12 页码:2060-2070
关键词	RETINAL GANGLION-CELLS RECEPTIVE-FIELD SIZE MACAQUE V1 NEURONS STRIATE CORTEX RETINOTOPIC ORGANIZATION SPATIAL-FREQUENCY LOCAL CONTRAST COMPLEX CELLS SCENES IMAGES
ISSN号	0953-816X
通讯作者	Yao, HS (reprint author), Chinese Acad Sci, Shanghai Inst Biol Sci, Inst Neurosci, Shanghai, Peoples R China.,haishanyao@ion.ac.cn
英文摘要	Both theoretical and experimental studies suggest that response properties in the visual system are shaped by signals in the natural environment. Recent studies showed that, in the primary visual cortex (V1), neurons preferring light decrements (OFF stimuli) outnumber those preferring light increments (ON stimuli). However, it is not clear whether the OFF-dominance in V1 neurons is related to the contrast statistics in natural images. By analysing the distribution of negative and positive contrasts in natural images at several spatial scales, we showed that optimal coding of the natural contrast signals would lead to a contrast-dependent OFF-dominant response, with a stronger degree of OFF-dominance at a higher contrast. Using bright and dark stimuli at various contrast levels to measure the receptive fields of neurons in cat V1, we found an increasing degree of OFF-dominance of the neuronal population as the contrast was increased. By modeling receptive fields exhibiting OFF- and ON-dominance, we found that contrast-dependent OFF-dominance facilitated the discrimination of stimuli with natural contrast distribution. Thus, by matching contrast-dependent OFF-dominance to the statistics of contrast distribution in natural images, V1 neurons may better discriminate contrast information in natural scenes.
收录类别	SCI
资助信息	973 program [2011CBA00401]
语种	英语
公开日期	2014-07-30
内容类型	期刊论文
源URL	[http://ir.sibs.ac.cn/handle/331001/2603]
专题	上海神经科学研究所_神经所(总)
推荐引用方式 GB/T 7714	Liu, KF,Yao, HS. Contrast-dependent OFF-dominance in cat primary visual cortex facilitates discrimination of stimuli with natural contrast statistics[J]. EUROPEAN JOURNAL OF NEUROSCIENCE,2014,39(12):2060-2070.
APA	Liu, KF,&Yao, HS.(2014).Contrast-dependent OFF-dominance in cat primary visual cortex facilitates discrimination of stimuli with natural contrast statistics.EUROPEAN JOURNAL OF NEUROSCIENCE,39(12),2060-2070.
MLA	Liu, KF,et al."Contrast-dependent OFF-dominance in cat primary visual cortex facilitates discrimination of stimuli with natural contrast statistics".EUROPEAN JOURNAL OF NEUROSCIENCE 39.12(2014):2060-2070.