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The maturation of the hypothalamo-pituitary-adrenal (HPA) axis is a key-component of the changes that occur during adolescence. In guinea pigs, HPA responsiveness during late adolescence depends strongly on the quantity and quality of social interactions: Males that lived in a large mixed-sex colony over the course of adolescence exhibit a lower stress response than males that were kept in pairs (one...
Adolescence is the transition from infancy to adulthood and encompasses major changes in the brain, the endocrine systems, and behavior. During late adolescence, male guinea pigs living in mixed-sex colonies exhibit a lower cortisol (C) response to novelty compared with animals in other ages and housing conditions. It was hypothesized that this reduction in stress responsiveness is induced by a high...
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