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 …

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 …

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

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 …

Adaptation, the prolonged presentation of stimuli, has been used to probe mechanisms of
visual processing in physiological, imaging, and perceptual studies. Previous …

Adaptation to a high-contrast grating stimulus causes reduced sensitivity to subsequent
presentation of a visual stimulus with similar spatial characteristics. This behavioral finding …

Virtually all stages of the visual system exhibit adaptation: neurons adjust their responses
based on the recent stimulus history. While some of these adjustments occur at specific …

The response amplitude of cat striate cortical cells is usually reduced after exposure to high-
contrast stimuli. The temporal characteristics and contrast sensitivity of this phenomenon …

The effects of microiontophoretic application of glutamate, GABA and the GABA antagonist,
bicuculline methiodide were tested on the degree of adaptation exhibited by striate cortical …

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 …