In addition, all the interactions were assessed: “CRF-inducedPNS” × “amygdala levels”, “PTSD induction” × “amygdala levels”, “CRF-inducedPNS” × “PTSD induction” and “CRF-inducedPNS” × “PTSD induction” × “amygdala levels”. This evidence concerns the gene CRH and post-traumatic stress disorder.