视觉指导的延时眼动下猕猴后顶叶皮层视觉感受野的动态变化
Alternative TitleDynamic change of visual receptive field during visually-guided delay saccades in macaque posterior parietal cortex
Cong Zhang; Lin Yang; Mingsha Zhang
2016
Conference Name2016年第一届北京视觉科学会议
Conference Date2016-07
Conference Place北京
Funding Organization中国科学院心理研究所
Other Abstract

Purpose: Primates frequently make saccadic eye movements to receive acute visual information, which causes blur and displacement of visual inputs on retina. However, despite the instable visual inputs our visual perception remains stable. One possible neural mechanism underlying the visual stabilization is so called perisaccadic receptive field (RF) remapping, i.e., around the time of saccade, visual neurons in many cortical areas become sensitive to spatial locations that will be covered by the neurons’ classical retinotopic RF after a saccade. This theory, however, is charged recently by findings that, just before saccade, neurons' RF in monkey’s frontal eye field converged to the location of saccadic target instead of future RF. To understand neural mechanisms of visual stability further, we systematically studied the dynamic change of visual RF in macaque posterior parietal cortex.
Methods: We recorded extracellular activity of single neurons while monkeys were performing a visually-guided delay saccade task, and mapped neuron’s visual RF at four periods ( fixation, delay, just before saccade and long after saccade) to get current RF, delay RF, perisaccadic RF and future RF. Then, we compared the spatial properties of them to analyze the dynamic change of a neuron’s visual RF.
Results: We recorded 119 visual neurons in total from the posterior parietal cortex of two monkeys. Among them, some (41/119) show constant retinotopic RF throughout the four task epochs, but another show significant change of receptive field just before saccade (37/119) or during delay period (19/119). Remarkably, the change of receptive field for most neurons tend toward the location of the future rather than saccadic target.
Conclusion: These results indicate that, inconsistent with frontal eye field, posterior parietal cortex integrates pre and post saccadic visual information through a mechanism of receptive field remapping rather than receptive field convergence. 

Keywordvisual stability receptive field transsaccadic integration macaque extracellular recording
Subject Area感知觉心理学
URL查看原文
Indexed By其他
Language英语
Document Type会议论文
Identifierhttp://ir.psych.ac.cn/handle/311026/20795
Collection心理所主办、承办、协办学术会议_2016年第一届北京视觉科学会议_会议摘要
Affiliation1.Institute of Neuroscience, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
2.State Key Laboratory of Cognitive Neuroscience and Learning, IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing 100875, China
Recommended Citation
GB/T 7714
Cong Zhang,Lin Yang,Mingsha Zhang. 视觉指导的延时眼动下猕猴后顶叶皮层视觉感受野的动态变化[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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