Figure 1. Overlap of symptoms associated with mild traumatic brain injury (mTBI) and post-traumatic stress disorder (PTSD).

Symptoms that are common to mTBI and PTSD include impaired concentration, tension headaches, mental slowness, and indecision. Distinct features of PTSD include intrusive flashbacks, recurrent nightmares, hyperarousal, and social avoidance. Distinct features of TBI include neurological deficits, seizures, and headaches with migraine features.