[How Sound Modulates Response to Light when Using Various Temporal Intervals between Stimuli of Different Modalities].

Extracellular activity of 34 primary visual cortex neurons of the rabbit was recorded in response to audiovisual stimulation with stimulus onset asynchronies (SOA) in range from -750 to + 150 ms (15 ranges in total). Auditory stimulus: 2000 Hz, 70 dB, 40 ms. Visual stimuli: two weak intensities 0.

[Sound affects the discrimination of weak intensities of light in the visual cortex of the rabbit depending on time intervals between sound and light].

In this paper, we researched an influence of sound (2000 Hz, 70 dB, 40 ms) to the discrimination of low-light intensities (0.3 and 1 cd/m2) in the visual cortex of the rabbit. We used a recording of evoked potentials from the visual cortex of awaked rabbits in chronic experiments.

[Specific modulation of neuronal responses to light of different intensities by sound in the rabbit's primary visual cortex].

Changes in activity of 92 neurons in the primary visual cortex of four rabbits (Orictolagus cuniculus) were analyzed. In the first series of experiments, we recorded discharges of 63 neurons in response to replacement of visual stimuli in pairs (pairs of 0.28 - 1, 1 - 3, 3 - 6, 6 - 8.

[Sound improves distinction of low intensities of light in the visual cortex of a rabbit].

Electrodes were implanted into cranium above the primary visual cortex of four rabbits (Orictolagus cuniculus). At the first stage, visual evoked potentials (VEPs) were recorded in response to substitution of threshold visual stimuli (0.28 and 0.

[Responses of rabbit's visual cortex neurons to changes in intensity and orientation of visual stimuli].

Changes in the number of spikes in the early phasic discharge (50-90 ms from stimuli replacement) of neurons in the rabbit's primary visual cortex were studied under conditions of an instant change in a flashing-line pattern. We used three type of stimulation: lines with different orientations (0-90 degrees) but constant intensity; lines with constant orientation but different intensities; complex stimuli with different intensities and different orientations of lines. Factor analysis made it possible to reconstruct two-dimensional sensory spaces of orientations in 13 of 43 analyzed neurons (30%).