Spatiotemporal frequency responses were measured at different levels of light adaptation for
cat X and Y retinal ganglion cells. Stationary sinusoidal luminance gratings whose contrast …

1. The discharges of single X and Y ganglion cells (distinguished by a test of linearity of
spatial summation) were recorded in the optic tract of anaesthetized, paralysed cats. 2 …

We investigated receptive field properties of cat retinal ganglion cells with visual stimuli
which were sinusoidal spatial gratings amplitude modulated in time by a sum of sinusoids …

The spatio‐temporal characteristics of cat retinal ganglion cells showing linear summation
have been studied by measuring both magnitude and phase of the responses of these cells …

Action potentials were recorded from single axons of retinal ganglion cells in adult lightly
anesthetized, paralyzed cats (intact eye). A small, sinusoidally time modulated stimulus was …

1. The impulse/quantum (I/Q) ratio was measured as a function of background illumination
for rod‐dominated, pure central, linear square‐wave responses of retinal ganglion cells in …

1. Variation in stimulus contrast produces a marked effect on the dynamics of the cat retina.
This contrast effect was investigated by measurement of the responses of X and Y ganglion …

1. A model is proposed for the effect of contrast on the first‐order frequency responses of cat
retinal ganglion cells. The model consists of several cascaded low pass filters ('leaky …

1. We have measured responses of macaque retinal ganglion cells to a uniform flickering
field, with variation in luminance, chromaticity or both (heterochromatic flicker). 2. With …

1. The mechanism which makes Y cells different from X cells was investigated. 2. Spatial
frequency contrast sensitivity functions for the fundamental and second harmonic responses …