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Binocular Summation in Normal, Monocularly Deprived, and Strabismic Cats: Visual Evoked Potentials by G. Sclar; I. Ohzawa; R. D. Freeman is a Neuroscience article available to read on EtoBox.

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We have studied visual evoked potentials (VEP) in the cat using dichoptically presented sinusoidal gratings. Our goals were to determine if binocular disparity causes differential responses in the VEP, and to examine the effects of monocular deprivation and convergent or divergent strabismus on the degree of binocular summation. Binocular disparity in stimuli causes no regular alterations of visual evoked responses, except at very low spatial frequencies. However, this apparent selectivity is probably due to luminance modulation in the central retina at low frequencies. The insensitivity to binocular disparity establishes that binocular summation in the VEP may be estimated without regard to the relative phase of gratings presented to the two eyes. Binocular summation of the VEP was examined in normal animals. We found that the ratio of the binocularly evoked response to the largest monocular response (averaged across spatial frequency) ranged from 1.27 to 2.12 (4 animals) and had a mean of 1.48. These values fall within the range which has been reported for human subjects. The degree of summation might be expected to be greatly reduced in strabismic and monocularly deprived animal

Who reads Binocular Summation in Normal, Monocularly Deprived, and Strabismic Cats: Visual Evoked Potentials?

Author

G. Sclar; I. Ohzawa; R. D. Freeman

Publisher

Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 0014-4819)

Published

1985

Language

EN

Field

Neuroscience (Life Sciences)