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Effect of progesterone and progesterone receptor antagonist on the percentage of open arm time in EPM test (n=6 rats per group). Every bar represents the mean±SEM. *** P<0.001 compared with sham group. ## P<0.01 compared with oil group
VEH: Vehicle; P4: Progesterone; RU+P4: RU486+ Progesterone; TBI: Traumatic Brain injury
