[Effect of early removal from the mother on the behavior of young rats and reactivity of the hypophyseal-adrenocortical system].
The control 21 day old rats remaining with their mother during experiments, revealed a better adaptation to environment than the control 30 day old rats: the former were less reactive in "safe" open field and more reactive to action of a nociceptive stimulus in a conditioning chamber, all this being reflected both in their behaviour and activity of their hypophyseal-adrenal system. Conditioning occurred faster at 21-day age. Weaning of 21 day old rats deteriorated their adaptation to the open field and decelerated their avoidance conditioning. Consequences of the weaning were still evident in 10 days. Weaning of 30 day old rats somewhat altered the level of their activity but did not affect their adaptation to environment. The weaning deprived 21 day old rats of their advantages in respect to older-age rats.
D000222:Adaptation, Physiological; D000818:Animals; D001522:Behavior, Animal / Q000502:physiology*; D003214:Conditioning, Classical / Q000502:physiology; D004924:Escape Reaction / Q000502:physiology; D005260:Female; D010913:Pituitary-Adrenal System / Q000502:physiology*; D051381:Rats; D011919:Rats, Inbred Strains; D013997:Time Factors; D014886:Weaning
Vliianie rannego ot"ema ot materi na povedenie krysiat i reaktivnost' gipofizarno-adrenokortikal'noĭ sistemy.