Male (A, C, E) and female (B, D, F) mice received vehicle or DHNA, and then were unstressed or subjected to UCMS for 4 weeks. Then, mice were examined for time spent with an object in a novel location in the OLR test (A, B); time spent with a novel object in the NOR test (C, D); and time to find the platform in the MWM (E, F); (*) Bonferroni post hoc contrast indicates a significant difference from unstressed mice (p < 0.05). Results are presented as mean + SEM.