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用脑光学成像术研究不同空间拓扑位置猫初级视皮层的空间频率反应特性
作者姓名:Yu HB  Shou TD
作者单位:1. 中国科技大学生命科学学院视觉研究实验室,合肥,230027;复旦大学生命科学学院脑科学研究中心及立人实验室,上海,200433
2. 中国科技大学生命科学学院视觉研究实验室,合肥,230027;复旦大学生命科学学院脑科学研究中心及立人实验室,上海,200433;中国科学院生物物理研究所视觉信息加工开放实验室,北京,100101
基金项目:SupportedbytheNationalNaturalScienceFoundationofChina,theShanghai UnileverResearchandDevelopmentFundandtheLabofVisualInformati
摘    要:采用基于内源信号的脑光学成像方法,在大范围视皮层研究了不同空间拓扑位置对应的皮层区的对光栅刺激空间频率反应特性。结果表明,周边视野对应区对高空间频率刺激反应极弱或没有反应,中心视野对应区对较宽的空间频率范围内的刺激均有反应,但对高频刺激反应更强;无论在周边对应区还是中心对应区,其视野越靠近中心,其空间频率调谐曲线和截止空间频率越靠近高频,而且这种过渡是平缓的。以上结果说明,猫初级视皮层空间频率反应

关 键 词:空间频率  空间拓扑位置  光学成像  初级视皮层

Spatial frequency tuning characteristics of cat primary visual cortex at different topological locations by optical imaging
Yu HB,Shou TD.Spatial frequency tuning characteristics of cat primary visual cortex at different topological locations by optical imaging[J].Acta Physiologica Sinica,2000,52(5):411-415.
Authors:Yu H B  Shou T D
Institution:Vision Research Laboratory, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China.
Abstract:Using optical imaging based on intrinsic signals, we studied spatial frequency tuning characteristics of cat primary visual cortex at different visual topological locations. We found that the areas representing the peripheral visual field had null or very weak responses to high spatial frequency grating stimuli, whereas the areas representing the central visual field responded to the stimuli of a wide range of spatial frequencies with greater responses to high spatial frequencies. The more centered the corresponding visual field of the cortical area, the higher the cutoff spatial frequency. The spatial frequency tuning curves also tended to have a smooth shift along the cortical surface. The results above demonstrate that spatial frequency tuning characteristics of the primary visual cortex change according to different visual topological locations of the cortical areas, in addition to the existence of spatial frequency columns. It is suggested that the distribution of spatial frequency columns may be related to visual topology. WT5HZ]
Keywords:spatial frequency  topological location  optical imaging  primary visual corte
本文献已被 CNKI 维普 万方数据 PubMed 等数据库收录!
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