Daniel has witnessed a violent crime and has been questioned by the police six months ago. A social worker, Dr. Rolly, who is reviewing the case is doing a research study regarding the development of PTSD and has asked Daniel to participate. Daniel agreed to participate and has had scans done of his brain while he discussed what he witnessed with Dr. Rolly. After reviewing the scans, Dr. Rolly does not think Daniel has PTSD. What evidence might Dr. Rolly have seen from the brain scans to draw this conclusion