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PTSD is marked by clear biological changes as well as psychological symptoms. PTSD is complicated by the fact that people with PTSD often may develop additional disorders such as depression, substance abuse, problems of memory and cognition, and other problems of physical and mental health.
The signs and symptoms of mild traumatic brain injury may include: 1  Loss of consciousness for a few seconds to a few minutes. 2  No loss of consciousness, but a state of being dazed, confused or disoriented.  Headache.