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. Author manuscript; available in PMC: 2008 Jun 3.
Published in final edited form as: Psychoneuroendocrinology. 2006 Jan 4;31(4):493–500. doi: 10.1016/j.psyneuen.2005.11.008

Figure 2.

Figure 2

Mean levels of plasma corticosterone (μg/dl−SEM) and ACTH (pg/ml+SEM) following the termination of 30 min of loud noise (105 dBA, SPL) at different time points (0, 15, 30, 60 and 120 min). The 0 min group was given 30 min loud noise presentation. Rats not given noise, but sacrificed at the same time as the experimental rats served as controls (C at the far right of the graph). Levels of plasma ACTH were already significantly reduced 15 min following noise termination. The reduction in plasma corticosterone levels lagged that of ACTH, and was evident beginning at the 30 min time point.