The responsiveness of neurons in the primary visual cortex (V1) is substantially reduced
after a few seconds of visual stimulation with an effective pattern. This phenomenon, called …

Second-order textures—patterns that cannot be detected by mechanisms sensitive only to
luminance changes—are ubiquitous in visual scenes, but the neuronal mechanisms …

In the adult brain, sensory cortical neurons undergo transient changes of their response
properties following prolonged exposure to an appropriate stimulus (adaptation). In cat V1 …

In contrast to neurons of the lateral geniculate nucleus (LGN), neurons in the primary visual
cortex (V1) are selective for the direction of visual motion. Cortical direction selectivity could …

Previous studies investigating the response properties of neurons in the primary visual
cortex of cats and primates have shown that prolonged exposure to optimally oriented, high …

Orientation-selective neurons shift their preferred orientation after being adapted to a
nonpreferred orientation. These shifts of the peaks of tuning curves may be in the attractive …

In frontalized mammals it has been demonstrated that adaptation produces shift of the peak
of the orientation tuning curve of neuron following frequent or lengthier presentation of a non …

One of the most salient features to emerge in visual cortex is sensitivity to stimulus
orientation. Here we asked if orientation selectivity, once established, is altered by …

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 …

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 …