[Effect of a dominant focus in the midbrain reticular formation on the functional state of the motor analyzer].
In chronic experiments on rabbits it was shown that after two-three stimulations of the midbrain reticular formation (stimulation frequency 200 cps, pulse duration 0.1-0.5 ms, voltage 1-3 V, stimulation duration 5 s) a dominant focus was formed in it, which led simultaneously to a statistically significant increase in the amplitude of evoked potential in the sensorimotor cerebral cortex and in motor reactions to afferent stimuli (light, sound). The state of increased excitability persisted for a long time (10-30 days depending on the number of stimulations of the reticular formation). Multiple stimulation of the reticular formation (5-12 times) led to creation of a pathological defensive dominant, manifested in a unitype series of legs movements in response to light and sound stimuli.
D000818:Animals; D001307:Auditory Perception / Q000502:physiology; D001931:Brain Mapping; D004292:Dominance, Cerebral / Q000502:physiology*; D004558:Electric Stimulation; D004569:Electroencephalography; D005071:Evoked Potentials; D008636:Mesencephalon / Q000502:physiology*; D009044:Motor Cortex / Q000502:physiology*; D009430:Neural Analyzers / Q000502:physiology*; D009434:Neural Pathways / Q000502:physiology; D011817:Rabbits; D012154:Reticular Formation / Q000502:physiology*; D013003:Somatosensory Cortex / Q000502:physiology; D014796:Visual Perception / Q000502:physiology
Vliianie dominantnogo ochaga v retikuliarnoĭ formatsii srednego mozga na funktsional'noe sostoianie dvigatel'nogo analizatora.