Influence of Press Chamber Hypoxia on the Research Activity of Animals

Abstract

The paper studies the features of orienting-exploratory activity in the conditions of adaptation of the body to pressure chamber hypoxia. White laboratory rats were used in the studies. Simulation of acute hypoxia was carried out in a pressure chamber. In the course of the work, it was found that acute hypoxia leads to inhibition of emotional and motor activity in animals on the 3rd day, depleting energy resources in the nerve cells of the brain of rats. It is known that in the brain, in comparison with the liver and heart, the highest rate of glycolytic reactions is observed, and therefore, within a short time interval, the concentration of lactate in the brain tissue increases significantly. In addition to the accumulation of lactic acid, there is an intensive formation of a number of under oxidized products — reduced pyridine nucleotides, an increase in the content of other organic acids of the Krebs cycle, for example, pyruvic acid. The general acidification of the intracellular environment of neurons is accompanied by a sharp decrease in the activity of cellular enzymes and a violation of their connections with the membrane. Starting from the fourth day, the excitability of neurons responsible for grooming is inhibited, the resistance of the animal organism to acute hypobaric hypoxia increases. The action of low barometric pressure (altitude 6000 meters above sea level) on the fifth and sixth day leads to hypoxic dysfunction of the higher parts of the central nervous system. Thus, the study of the features of the course of bioelectrical processes in the CNS against the background of emerging acute exogenous hypoxic conditions of various origins is of particular importance due to the need to obtain timely and objective information about the severity of functional disorders of brain structures sensitive to hypoxia, as well as to determine the level of their damage.