Visually Evoked Cortical Response in Light-Adapted Cat and Liminal Brightness Discrimination

Abstract

The visually evoked cortical responses we recorded in the light-adapted state consisted of primary complexes and spike-like waves.

Discrimination of visually perceived intervals of time

“…On the other hand, Suzuki, Nunokawa, and Jacobson (1972) found, in the eat's cortex, only a very slight dependence of the amplitude of the VEPs (which were of very complex nature) on the magnitude of large field intensity increments over many decades; rather, it was the form of the response that changed.…”

“…Samson and Young (1973) found, in the pigeon's optic tectum, a decrease in amplitude and, surprisingly, an increase in latency for the pulse response at increasing background luminance. Suzuki et al (1972), on the other hand, in the eat's cortex and with luminance increments at very large fields, recorded YEPs that, in amplitude, were fairly independent of both increment luminance and adaptation level; instead, these parameters influenced latencies and relative dominances of individual parts of the YEP. The effect of adaptation level was followed over about 3 decades.…”

EEG-based visual deviance detection in freely behaving mice

“…Rather than being processed as flashes of different intensities, based on the off-responses, the used stimuli seemed to be processed as shifts in light intensity. While the processing of different levels of light intensity (Lopez et al, 2002;Perenboom et al, 2020) and its dependence on light-adaptation (Suzuki et al, 1972) have been studied in mice and cats, little is known on how shifts in light intensity are processed. One early study described the presence of off-responses, which were, contrary to what we observed, of similar shape as on-responses, when light flashes (i.e.…”

Effects of Background Illumination on the Receptive Field Organization of Single Cortical Cells in Area 18 of the Immobilized Cat

“…SUZUKI et al (1967SUZUKI et al ( , 1970SUZUKI et al ( , 1971SUZUKI et al ( , 1972) also found that a change in the background illumination intensity altered the configuration of visually evoked potentials in area 18 and the discharge patterns of single cells. More recently, SASAKI et al (1971) reported that changing conditions also altered the quantitatively determined receptive field maps of the striate units, which were obtained by point light stimuli.…”