DYNAMIC SURROUNDS OF RECEPTIVE-FIELDS IN PRIMATE STRIATE CORTEX - A PHYSIOLOGICAL-BASIS FOR PERCEPTUAL COMPLETION

被引:136
作者
FIORANI, M [1 ]
ROSA, MGP [1 ]
GATTASS, R [1 ]
ROCHAMIRANDA, CE [1 ]
机构
[1] NIMH, NEUROPSYCHOL LAB, BETHESDA, MD 20892 USA
关键词
MONKEY; VISUAL CORTEX; RECEPTIVE-FIELD STRUCTURE; OPTIC DISK; VISUAL PSYCHOPHYSICS;
D O I
10.1073/pnas.89.18.8547
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Visual receptive fields (RFs) were mapped inside and outside the cortical representation of the optic disk in the striate cortex (area V1) of anesthetized and paralyzed Cebus monkeys. Unexpectedly, most cells were found to be binocularly driven, and the RFs mapped with contralateral-eye stimulation progressed in a topographically appropriate fashion as the optic disk sector was crossed. Activation of these neurons by the contralateral eye was shown to depend on stimulation of the parts of the retina around the optic disk. Outside the optic disk representation, a similar effect was demonstrated by obstructing the "classical" RF with masks 5-10 times larger in size. In all cases, visual stimuli presented around the mask could be used to accurately interpolate the position of the hidden RF. These properties reflect, at a cellular level, the process of "filling in" that allows for completion of the visual image across natural and artificially induced scotomas.
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页码:8547 / 8551
页数:5
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