Abstract
The concept of receptive field is important because it draws attention to the fact that the sensitivity of a neurone to photic stimuli is spread out over a region. The distribution of sensitivity is a functional sign that neural analysis of the retinal image has begun. The changing visual scene is not like “snow” on a television screen: it contains objects which are characterized by properties of local extension and local connectedness of various kinds. In order to detect their presence and progression, neurones must reflect at least some of the properties in their spatial distribution of sensitivity (referred to the receptor mosaic or to the external visual field).
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