Corticosterone concentrations determined in blood plasma, before, and 1 and 6 days after chronic stress.

<p>Using tail-incision, blood was withdrawn during the light period of the day at A) 09∶00 a.m., 13∶00 and 17∶00 p.m. to determine the corticosterone (ng/ml) levels; B) Overall corticosterone concentration during the light period, expressed as Area Under the Curve (AUC_total). Data represent mean ± SEM; *p<0.05 1-day post-stress vs. before stress and/or 6-days post-stress.