FLX treatment did not change the number of GABA+ cells in themFC and hippocampus. (A, C) Representative coronal images ofGABA+ cells in the mFC (A) and hippocampus (C) ofvehicle-treated (upper) and FLX-treated mice (lower). Mice received FLXfor 3 weeks at 15 mg/kg/day. (B, D) The number ofGABA+ cells (left graphs) and the fluorescence intensity of GABA(right graphs) were quantified in the mFC (B) and hippocampal CA3region (D) of vehicle-treated and FLX-treated mice(n = 4 mice each; 11-week-old). CA, cornu ammonis; FLX,fluoxetine; mFC, medial frontal cortex.