health care concept. doctor hands holding a stethoscope and ptsd - post traumatic stress disorder words on gray background. war v

amnesia anxiety arousal assault avoidance death definition depression diagnosis disasters disorder disturbing doctor emergency exposed fear flashback guilty help helplessness holding hyperarousal hypervigilance illness information injury memories mental neuroendocrinology nightmares notebook numbing paper phobia powerlessness psychological ptsd recurring risk stethoscope stress terrorism therapy threat torture trauma traumatic violence war