[The behavioral and neurohormonal manifestations of emotional stress states in monkeys]. / Povedencheskie i neirogormonal'nye proiavleniia émotsional'no-stressornykh sostoianii u obez'ian.

Under the effect of intense stressful stimuli baboons developed a depressive state. The disintegration of individual and social behaviour correlates with changes in functional activity of steroid-producing glands and the dynamics of the blood endorphin concentration, thus suggesting involvement of the opioid peptide system and the hypophyseal-gonadal complex in mechanisms of stress-induced depressive states.

[Stress-inducing behavioral changes and the functions of the neurohormonal systems in monkeys of different social ranks]. / Stressindutsirovannye izmeneniia povedeniia i funktsii neirogormonal'nykh sistem u obez'ian razlichnogo sotsial'nogo ranga.

As a result of intensive stressful stimuli hamadryas baboons developed, depending on their hierarchic status, depression-like states varying in severity. Their development correlated with a drastic release of biogenic amines, activation of pituitary-adrenal system and inhibition of hormonal function of the gonads. It is shown that dominant and low-rank monkeys, in spite of the differences in their initial psychoemotional states and in the blood levels of mediators and hormones, demonstrated marked disintegration in their individual and social behavior. There was a larger increase in the blood concentrations of dopamine, serotonin and cortisol and more significant inhibition of testosterone production under the influence of two-hour immobilization as compared to the subdominant animals.

[Psychopathological and hormonal manifestations of alcoholic intoxication and emotional stress in monkeys]. / Psikhopatologicheskie i gormonal'nye proiavleniia alkogo'noi intoksikatsii i émotsional'nogo stressa u obez'ian.

Ethological approach to studying mature P. hamadryas and M. mulatta males has revealed a wide spectrum of changes in individual and zoosocial behaviour in response to the administration of different alcohol doses and stress stimuli. It has been established that neuroendocrine basis for the depression of psychic and locomotor activities developing in conditions of alcohol intoxication and emotional stress is an extremely high release of catecholamines and the increase of glucocorticoid secretion accompanied by a sharp decrease in androgen products. It should be noted that the exposure to stress stimuli during consumption of small alcohol doses intensifies depression-like stress-induced behaviour of monkeys.