感受野
视皮层
环绕抑制
前馈
神经科学
神经编码
视野
计算机科学
编码(社会科学)
视觉感受
人工智能
心理学
数学
感知
统计
工程类
控制工程
作者
Rajesh P. N. Rao,Dana H. Ballard
摘要
We describe a model of visual processing in which feedback connections from a higher- to a lower- order visual cortical area carry predictions of lower-level neural activities, whereas the feedforward connections carry the residual errors between the predictions and the actual lower-level activities. When exposed to natural images, a hierarchical network of model neurons implementing such a model developed simple-cell-like receptive fields. A subset of neurons responsible for carrying the residual errors showed endstopping and other extra-classical receptive-field effects. These results suggest that rather than being exclusively feedforward phenomena, nonclassical surround effects in the visual cortex may also result from cortico-cortical feedback as a consequence of the visual system using an efficient hierarchical strategy for encoding natural images.
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