<span>There is not such thing as a universally accepted standard of flexibility because there's no material that is taken as a reference point. You can't say it's twice the flexibilty of rubber or twice the flexibilty of bamboo or anything similar because no official reference points have been established in the SI system.</span>
Post-traumatic stress disorder (PTSD) is an extreme stress response to a traumatic event that threatens your safety or makes you feel helpless. The symptoms of PTSD present as a psychiatric condition that can develop following any traumatic, life-threatening, or highly unsafe, catastrophic life experience.
