Lateral interactions in primary visual cortex: a model bridging physiology and psychophysics.
Lateral interactions in primary visual cortex: a model bridging physiology and psychophysics.
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DOI：
10.1126/science.7569930
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发表时间：
1995-09
期刊：
影响因子：
56.9
通讯作者：
Martin B. Stemmler;Marius Usher;Marius Usher;Marius Usher;E. Niebur
中科院分区：
文献类型：
--
作者：
Martin B. Stemmler;Marius Usher;Marius Usher;Marius Usher;E. Niebur
最近的生理学研究表明，视觉刺激的空间背景增强了初级视皮层细胞对弱刺激的反应，抑制了对强刺激的反应。建立了一个定向调节神经元的模型，以探索皮质外侧连接在这一双重效应中的作用。通过侧向连接传递的兴奋性和抑制性电流和噪声的不同效应解释了生理结果以及突出和轮廓完成的心理物理学。利用模型的随机共振特性，视觉背景改变了模型的内在输入变异性，以增强对微弱信号的检测。
Recent physiological studies show that the spatial context of visual stimuli enhances the response of cells in primary visual cortex to weak stimuli and suppresses the response to strong stimuli. A model of orientation-tuned neurons was constructed to explore the role of lateral cortical connections in this dual effect. The differential effect of excitatory and inhibitory current and noise conveyed by the lateral connections explains the physiological results as well as the psychophysics of pop-out and contour completion. Exploiting the model's property of stochastic resonance, the visual context changes the model's intrinsic input variability to enhance the detection of weak signals.