<prompt> Post traumatic stress disorder PTSD is differentiated from other disorders by presence of:Nightmares about eventsAutonomic arousal and anxietyRecall of events and avoidance of similar experiencesDepression  <response>: Recall of events and avoidance is quite typical of PTSD. Nightmares, autonomic arousal and depressive symptoms can be seen in other disorders also. Symptoms can be divided into four types:1 Reexperiencing e.g., intrusive memories of the event and nightmares2 Hyperarousal e.g., anxiety, increased stale response, impaired sleep, hypervigilance3 Emotional numbing e.g., difficulty connecting with others4 Avoidance e.g., survivors guilt, dissociation, and social withdrawal In adjustment disorder: There are emotional symptoms e.g., anxiety, depression, or conduct problems causing social, school,or work impairment occurring within 3 mos and lasting less than 6 mos after a serious life event e.g., divorce, bankruptcy, changing residence but do not meet full criteria for a mood or anxiety disorder 