[Non-specific facilitating influences on the responses of rabbit visual cortex neurons].
A study was made of neuronal responses in the rabbit visual cortex to patterned visual stimuli and their change during non-specific activation reaction. Non-specific activation while only slightly affecting the background neuronal activity, enhances the responses of most units to patterned visual stimuli. A comparison of responses with a different degree of inhibition participation shows that the depression of inhibitory processes may act as a mechanism of facilitation of the responses during non-specific activation. After facilitated responses evoked by the action of the stimulus during non-specific activation, the neurones retain a state of enhanced excitability. Repetition of stimuli not attended with non-specific activation leads to the diminution of excitability. The possible connection of the indicated effects with extinction processes is discussed.
D000818:Animals; D004594:Electrophysiology; D009433:Neural Inhibition; D010146:Pain; D011817:Rabbits; D014793:Visual Cortex / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*
Nespetsificheskie oblegchaiushchia vliianiia na reaktsii neĭronov zritel'noĭ kory krolika.