BAYESIAN-ANALYSIS OF IDENTIFICATION PERFORMANCE IN MONKEY VISUAL-CORTEX - NONLINEAR MECHANISMS AND STIMULUS CERTAINTY

被引:80
作者
GEISLER, WS [1 ]
ALBRECHT, DG [1 ]
机构
[1] UNIV TEXAS,DEPT PSYCHOL,AUSTIN,TX 78712
关键词
CORTEX; RECEPTIVE FIELDS; SPATIAL VISION; CONTRAST GAIN CONTROL; NOISE; SPATIAL FREQUENCY;
D O I
10.1016/0042-6989(95)00029-Y
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The identification performance of single neurons in the primary visual cortex was quantified by measuring how accurately one could know the stimulus based upon the neuron's response. We found that for a typical neuron a response of 10 action potentials, following one brief stimulus presentation, was sufficient to classify the stimulus as belonging to a relatively small region in stimulus space, with a high degree of confidence. The performance was better than that which could be attained through linear summation of excitation and inhibition alone. The results suggest that the enhanced performance is a consequence of two nonlinear mechanisms: contrast gain and expansive response exponent.
引用
收藏
页码:2723 / 2730
页数:8
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