INFLUENCE OF CHRONIC STRESS, LONG-TERM AD APTATION TO HYPOXIA, AND THEIR COMBINATION ON BEHAVIORAL REACTIONS OF RATS WITH DIFFERENT TYPOLOGICAL CHARACTERISTICS

Chronic stress caused by 3-week electro-pain stimulation (4 h daily) c ombined with <<white noise>>, resulted in a decrease of horizontal mot or activity of rats with extreme types of behaviour, i. e., active and passive. No changes in behaviour of animals with intermediate behavio ural type were found. Long-term (30 days) adaptation to hypoxy (daily lifting to 11000 m for 5 h) did not cause changes in behaviour of rats . Combination of stress and hypoxy caused an increase of number of gro oming acts in rats with passive type of behaviour, testifying to their increased anxiety. Long-term adaptation to hypoxy did not influence t he degree of loss of motor activity caused by chronic stress in animal s with active and passive types of behaviour.