[Spectral characteristics of the bioelectrical activity of the cerebral cortex upon electric stimulation of subcortical structures].
A spectral-correlation analysis of electrical activity of the rabbit cerebral cortex was made with the use of Dnieper computer, after electrical stimulation (100-250 c/s) of the midbrain reticular formation, the thalamic nonspecific formations (midline nuclei) and different nuclei of the posterior part of the hypothalamic area (ventromedial and posterior hypothalamic nuclei and the lateral field). The background spectrograms were characterized by a high variability; their frequencies ranged from 0,5 to 12 c/s. Under the influence of the electrical stimulation of the indicated formations, a well-pronounced, dominating peak appeared in the spectrograms of the cortical EEG, in the band from 4 to 7 c/s, and the similarity of biopotentials in this rhythm increased. The experimental data show that enhancement of spatial synchronization of the cortical biopotentials under conditions of electrical stimulation of the indicated subcortical formations is based on increased rhythmic oscillations within the theta-band and on a greater coherence in this range.
D000818:Animals; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000502:physiology*; D004558:Electric Stimulation; D007034:Hypothalamus, Posterior / Q000502:physiology; D008636:Mesencephalon / Q000502:physiology; D009434:Neural Pathways; D011817:Rabbits; D012154:Reticular Formation / Q000502:physiology; D013787:Thalamic Nuclei / Q000502:physiology
Spektral'nye kharakteristiki bioélektricheskoĭ aktivnosti kory bol'shikh polushariĭ pri élektricheskoĭ stimuliatsii podkorkovykh obrazovaniĭ