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Comparison of time spent in the target quadrant during probe trial in Morris water maze (MWM) (a) and the number of entries to target quadrant during probe trial (b) in study groups at 3, 7, 14, and 21 days after injury (n = 6). Each bar represents mean ± SEM. ∗P < 0.05, ∗∗P < 0.01 compared with sham group. ∧P < 0.05 compared with vehicle group. TBI: traumatic brain injury; Veh: vehicle; and SC: stem cell.
