CNR1 and post-traumatic stress disorder: Higher expression of CB1R was found in the PTSD group in the hippocampus (2.22 ± 0.22), amygdala (3.03 ± 0.63), and PFC (2.33 ± 0.56) compared with the control and Sevo groups (p < 0.01 vs Ctrl and Sevo).