Abstract
The shapes of horizontal cell receptive fields in the frog retina were determined using a retinotopic mapping technique based on a 16 X 16 spatial array of stimuli. Fields derived from first order kernel magnitude were sometimes circular but more often elliptical. Morphologic studies of Golgi stained horizontal cells showed most to be elliptical with a non random orientation tending to orthogonality. It is suggested that this feature makes unlikely an explanation of field eccentricity based on cell alignment. It is noted that cell axons tend to cross the retina in a line and may function as an extended dendrite to provide the eccentric and elliptical receptive fields.
Published Version
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