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(A) Ketamine, at the effective dose (20 mg/kg) used in the SI test, does not interfere with fear memory retention in the passive avoidance test. All mice, regardless of treatment with vehicle or ketamine 1 hr after the training day, avoid entering the dark compartment on the testing day. (B) Ketamine treatment (20 mg/kg) 24 hrs prior to testing does not affect behavior in the elevated plus maze (EPM). *p<0.05 for within-group comparisons, n=8–11 mice/group.
