Posttraumatic disorder (PTSD) In elderly persons impairs their ability to d
eal with subsequent life stress and to negotiate the developmental stages o
f late life successfully. If can stem from trauma at any point in life. Sym
ptoms may be persistent or intermittent, and the disorder may be time-limit
ed or chronic. Increasing severity of trauma and premorbid psychiatric illn
ess predispose to the development of PTSD, and certain personality traits a
nd good psychosocial support protect against it. Elderly individuals do not
appear more predisposed than young persons to develop PTSD, and symptoms o
f the disorder are similar across age groups: reexperiencing the trauma, av
oidance, and hyperarousal. Dysfunctions of the adrenergic system and the hy
pothalamic-pituitary-adrenal axis have been Implicated in the neurobiology
of PTSD, although there is no current evidence that the changes seen in the
se systems with aging affect the development or presentation of PTSD in old
er individuals. Antidepressants, group therapy, and cognitive-behavioral th
erapy are presently the mainstays of treatment, although to date no systema
tic and controlled research has been done on the treatment of PTSD In this
age group.