皮层下ON和OFF细胞反应的差异可以解释黑白光斑刺激产生的视觉后像的不对称性
其他题名Differences in subcortical ON and OFF responses may explain asymmetrical negative afterimages to dark and bright disks
Hui Li; Xu Liu; Xiaohong Li; Yiliang Lu; Lothar Spillmann; Ian M. Andolina; Wei Wang
2016
会议名称2016年第一届北京视觉科学会议
会议日期2016-07
会议地点北京
会议主办者中国科学院心理研究所
其他摘要

PURPOSE: Human subjects are more sensitive to luminance decrements than luminance increments, as is evident by a lower threshold and shorter latency for dark stimuli. This asymmetry can be explained by the results of neurophysiological recordings in dLGN and V1 of cat and monkey. Specifically, V1 population responses demonstrate that black stimuli elicit a higher level of activation than white stimuli, while the response latency of OFF cells in dLGN is shorter than that of ON cells. The removal of a black or white spot often generates the perception of a negative afterimage. Here we ask whether increment and decrement stimuli also elicit asymmetrical negative afterimages? If so, can these asymmetries be attributed to the asymmetries for ON- and OFF-channels?
METHODS: To answer these questions, we performed psychophysical experiments in human observers and single-cell recordings in cat dLGN.
RESULTS: Psychophysically, we found that bright afterimages elicited by luminance decrements (darker flash spots) are stronger and last longer than dark afterimages elicited by luminance increments of equal size; yet the perceptual latency of the latter is shorter than that of bright afterimages. Neurophysiologically, we found that ON cells in dLGN (and retina by analyzing S-potentials) responded to the removal of a dark spot with higher ?ring rates and longer latencies than OFF cells to the removal of a bright spot.
CONCLUSIONS: We suggest that subcortical differences in ON- and OFF-channels can explain asymmetries between bright and dark negative afterimages which is consistent with a subcortical origin of negative afterimages.

关键词Afterimage ON OFF Asymmetry LGN
学科领域感知觉心理学
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收录类别其他
语种英语
文献类型会议论文
条目标识符http://ir.psych.ac.cn/handle/311026/20815
专题心理所主办学术会议_2016年第一届北京视觉科学会议_会议摘要
作者单位Institute of Neuroscience, State Key Laboratory of Neuroscience and Key Laboratory of Primate Neurobiology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, P. R. China
推荐引用方式
GB/T 7714
Hui Li,Xu Liu,Xiaohong Li,等. 皮层下ON和OFF细胞反应的差异可以解释黑白光斑刺激产生的视觉后像的不对称性[C]. 见:2016年第一届北京视觉科学会议. 北京. 2016-07.http://vision.csp.escience.cn/dct/page/1.
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