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Mean (± S.E.M.) ng/mL serum CORT concentrations at 24-hr (Day 1) and 21 days after TBI or sham injury. The Day and Night groups were sacrificed according to their behavioral testing schedule. CORT levels after behavioral testing were not affected by TBI. No differences were observed between Sham and TBI animals. The only differences were between the Night and Day groups at 24-hr (#p < 0.05).
