Stress effect on hippocampal activity during classification learning. A, During the PCL task, the right hippocampus was significantly less activated in the stress group than in the control group (pcorr < 0.05, FWE corrected). Coronal and sagittal sections are shown, superimposed on a T1-template image. L, left. B, Parameter estimates of the peak voxel for the control and stress groups in the PCL and control task, respectively. Data represent mean ± SEM (*p < 0.05).