- (A)  Ryan    is  most    likely  to  be  classified  as  suffering   from    GAD,    generalized anxiety disorder.   As
 described in the question, GAD involves a nearly constant low-level arousal of the autonomic
 nervous system. Major depressive disorder is a mood disorder rather than an anxiety disorder.
 Hypochondriasis is a type of somatoform disorder in which sufferers fear that typical body
 sensations are indicative of medical problems. People who have obsessive-compulsive personality
 disorder tend to be inflexible and overly concerned with things like neatness, routine, and
 perfection. PTSD (posttraumatic stress disorder) follows some kind of trauma and is usually
 marked by anxiety caused by memories, flashbacks, and nightmares having to do with the trauma.
                    
                      marvins-underground-k-12
                      (Marvins-Underground-K-12)
                      
                    
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