We studied the influence of microorganisms isolated from permafrost on the psychophysiological parameters of birds. Significant effect of the microbiota of the paleoecosystems of the cryolithozone on locomotor activity, psycho-emotional state, and psychophysiological lateralization of brain function of Gallus gallus chickens. The involvement of both the autonomic and the higher central nervous systems in this regulatory process via synthesis of neuropeptides by symbionts is discussed.
Keywords: chick behavior; electron microscopy; microbiota; open-field test; permafrost.