Mean (± standard error of the mean) time (sec) to locate a hidden (submerged) platform in a water maze. *p < 0.05 vs. TBI + STD + VEH, TBI + STD + HAL, and TBI + EE + HAL. ^p < 0.05 vs. TBI + STD + VEH and TBI + STD + HAL. **p < 0.05 vs. all TBI groups. No other comparisons were statistically different. STD, standard; VEH, vehicle; HAL, haloperidol; EE, environmental enrichment.