Neurons in area 17 of the cat visual cortex adapt when stimulated by drifting patterns of
optimal orientation, spatial frequency and temporal frequency (Ohzawa et al. 1982; Albrecht …

Spatial contrast adaptation, produced by prolonged exposure to high contrast grating
patterns, has become an important psychophysical method for isolating spatial and …

Adaptation-induced changes in the temporal-frequency tuning and direction selectivity of cat
visual cortical cells were studied. Aftereffects were induced largely independent of direction …

Cat striate cortical neurons were investigated using a new method of studying adaptation
aftereffects. Stimuli were sinusoidal gratings of variable contrast, spatial frequency, and drift …

1. Responses of simple cells in cat striate cortex were studied with flashed light-slit stimuli.
The responses to bars flashed in different positions in the receptive field were assessed …

Motion after-effects were elicited from striate cortical cells in lightly-anaesthetized cats, by
adapting with square-wave gratings or randomly textured fields drifting steadily and …

Extracellular single-unit recordings were made from simple cells in area 17 of anesthetized
cats. Cells were tested with drifting gratings under control and adapted conditions …

1. Responses of single cortical neurons in area 17 of anesthetized cats were recorded in
response to prolonged stimulation with a patch of drifting square-wave grating. 2. During …

1. The selectivity of adaptation to unidirectional motion was examined in neurons of the cat
striate cortex. Following prolonged stimulation with a unidirectional high-contrast grating, the …

We have examined the idea that the adaptation of cortical neurons to local contrast levels in
a visual stimulus is functionally advantageous. Specifically, cortical cells may have large …