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[Evolutionary aspects of sleep and stress interaction: phylo-, ontogenetic approach].

This work deals the comparative behavioral, somatosensor and neurophysiological characteristics of these forms of passive defensive behavior included in amphibian's sleep-wakefulness cycle and their developmental dynamics in the ascending vertebrates secale. Sleep formation in early postnatal ontogenesis of mature- and immature-born mammals - from undifferent sleep to the mature sleep divided into two phases as well as stress formation are considered in parallel. Comparative phylo-, and ontogenetic analysis of several aspects of stress-reactions, sleep, and immobility phenomenon of cataleptic type allows concluding that amphibians and reptilians catalepsy can be interpreted as preadaptive from of behavior underlying in the stress of homoeothermic animals. Another word, the cataleptic state can be considered as the homologic state of stress-reaction. Catalepsy is the genetically programmed state of poykilothermic animals characterized by comparatively high alertness of animal, its freezing in immobile but active posture with a possibility of fast exit into waking state and alongside with other somatosensor and neurophysiological characteristics determines the entire subsequent complex of evolutionary morphofunctional, neurophysiological and hormonal changes in nomoyptherms. This in many aspects unspecific behavioral adaptive reaction in poykilotherms is realized on the corresponding hormonal and neurophysiological levels of development and promotes to fast mobilization and stabilization their homeostasis. At the higher evolutionary scale after development of most brain neurotransmitter and hypothalamo-pituitary-adrenal systems the leading role in stress regulation begins to be predominent the hormonal reaction. Only in the alertness phase of stress-reaction the elements of activation of extrapyramidal regulatory system of locomotion are observed. This is manifested by the cateleptic immobility. Thus the stress as the general adaptational syndrome reflects the evolutionary regularities of development of specific functions supporting the total homeostasis. The scheme of evolution of sleep-wakefulness cycle in vertebrates is presented; according to it, the immobility state of cataleptic type on one hand may to considered as a part of wakefulness providing mainly specific elements of stress-reaction, while on other hand it is a certain step of inhibitory processes in CNS for subsequent involvement of sleep-regulatory systems for the compensation and maintenance of recovery reactions.