[The variability of physiological parameters as an index of the activity of the system of cerebral circulatory regulation].

Chronic experiments of rabbits revealed the regularities of alterations in the variability of parameters characterizing cerebral blood supply under orthostatic and hypercapnic effects. Their connexion with the degree of activation of the systems controlling the cerebral circulation, is determined. A technique of coupled loads was suggested for a more precise prognostication of the system responses to the action of factors with increasing strength.