I recently heard PTSD described as “Post Traumatic Stress Injury” rather than “Disorder.” I believe that injury is a more accurate descriptor. PTSD is an injury caused by trauma.
In moments of extreme stress, our reptilian brains, or the part of the brain that controls our most vital functions, become activated. This allows us to respond in order to survive: we fight, flight, or freeze. Sometimes we can get stuck in these responses, even after the threat is gone.