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Graphs show the mean plasma ACTH(A) and corticosterone (B) responses (±1 standard error of the mean) over the course of Experiment 1. Experiment 1 examined whether habituated CORT and ACTH release obtained after 7 repeated daily exposures to loud noise would be retained when animals were re-tested either 24 hrs, 1, 2, or 4 weeks after being habituated. Plasma endocrine values did not vary significantly between the groups on days 1, 3, 7 or test noise exposures.
