A Study of Receptive Fields on Neurons of Cat's Visual Cortex as Filters of Spatial Frequency,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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The striation of a stimulus passing across a complex or supercomplex receptive field of a cats visual cortex RFVC defines the characteristics of the fields responses. For each RF receptive field an optimum stimulus which evokes a maximum response can be found. The more bands there are in the optimum stimulus, the smaller is the average width of bars and the intervals between them. The effective areas of the stimulus is independent of the number of bands it contains and is equal to 2.6 degrees on the average in diameter. The column of neurons with identical orientation of the RFs contains fields in which optimum stimuli consist of a different number of bands. These data lead one to assume that the RFVC are narrow-band filters of spatial frequencies and perform a piecewise Fourier transform of the image. A network of such neurons will discern the boundary between textures.
- Anatomy and Physiology