NR3C2 and post-traumatic stress disorder: Moreover, they suggest a role for increased GR and MR availability in the dorsal hippocampus and reduced MR and GR availability in the ventral hippocampus in the development of PTSD-like behavioral responses by stressed rats (in both cases, the effects of stress in EBR are significantly different from the effects in MBR but not significantly different from the effects in PBR).