which occurrence is a biologic indicator of posttraumatic stress disorder (ptsd)
Posttraumatic stress disorder Posttraumatic stress disorder (PTSD)[note 1] is a mental disorder that can develop after a person is exposed to a traumatic event, such as sexual assault, warfare, traffic collisions, or other threats on a person's life.[1] Symptoms may include disturbing thoughts, feelings, or dreams related to the events, mental or physical distress to trauma-related cues, attempts to avoid trauma-related cues, alterations in how a person thinks and feels, and an increase in the fight-or-flight response.[1][3] These symptoms last for more than a month after the event.[1] Young children are less likely to show distress but instead may express their memories through play.[1] A person with PTSD is at a higher risk for suicide and intentional self-harm.[2][6]
Diagnostic and Statistical Manual of Mental Disorders A "text revision" of the DSM-IV, known as the DSM-IV-TR, was published in 2000. The diagnostic categories and the vast majority of the specific criteria for diagnosis were unchanged.[38] The text sections giving extra information on each diagnosis were updated, as were some of the diagnostic codes to maintain consistency with the ICD. The DSM-IV-TR was organized into a five-part axial system. The first axis incorporated clinical disorders. The second axis covered personality disorders and intellectual disabilities. The remaining axes covered medical, psychosocial, environmental, and childhood factors functionally necessary to provide diagnostic criteria for health care assessments.