Changes in two stressors at six weeks. The decrease of GR expression in the CA3, the volume atrophy of the CA3, and further behavioral abnormalities were still found in the physical stress group, while GR expression in the CA3 and DG, the volume atrophy of the CA3 and DG, and more significant behavioral abnormalities were found in the physical stress. Immunofluorescence staining for GR were taken using a confocal FV1000-BX61WI microscope (Olympus, Japan), 20 × 0.40 NA objective (Olympus, Japan)