Figure 4.The area under the curves of ACTH level response to functional tests with administration of CRH (at top) and AVP (at bottom) in young and old female rhesus monkeys with different types of behavior (mean±S.E.M; begun at 15:00h). **p < 0.01; **p < 0.001 – vs. relative values in animals with SB; + p <0.05 – age-related differences.