[Possible mechanism of the thalamic pacemaker of alpha-rhythm and fusiform activity].
Proceedings from the analysis of known experimental data on theta-rhythm (fusiform activity) a determinate model of its generator is proposed. It is based on the mechanism of beats frequencies. The model consists of 2 united identical moduli generating harmonic (rhythmical) oscillations alpha-rhythms of approximating frequencies v1 and v2 = v1 + delta v. The working regime of the generator is determined by the trigger pulse frequency. The proposed quantitative relationships between theta-rhythm parameters--T, n and frequencies of constituent oscillations v and delta v are checked up by analysing oscillograms of barbiturate activity in EEG of dogs. The results obtained are in favour of determinate rather than stochastic mechanism of theta-rhythm.
D000513:Alpha Rhythm; D000818:Animals; D001463:Barbiturates / Q000494:pharmacology; D004285:Dogs; D004569:Electroencephalography; D008959:Models, Neurological; D013788:Thalamus / Q000187:drug effects / Q000502:physiology*; D013826:Theta Rhythm
D001463:Barbiturates
Vozmozhnyĭ mekhanizm talamicheskogo voditelia al'fa-ritma i veretenoobraznoĭ aktivnosti.