[Characteristics of the formation of reinforcing brain systems in rats under the limitation of individual experience].

Emotiogenic (reinforcing) abilities of the hypothalamic lateral nucleus and cortico-medial part of the amygdala were studied with locomotor and lever self-stimulation techniques in normal rats and in those which had been kept under partial sensory and intraspecies deprivation during early postnatal development. A noticeable increase in size and excitability of negative reinforcing areas occurred in the latter rats. The data obtained suggest that limitation of early individual experience results in including of polyfunctional emotiogenic structures into the systems of negative emotion regulation.