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Researchers estimate that more than 300,000 U.S. veterans of the wars in Iraq and Afghanistan (20% of the 1.6 million) have sustained a mild traumatic brain injury (TBI), also known as concussion, with the majority going untreated.1 In response, the Department of Defense and the Department of Veterans Affairs (VA) have implemented new postdeployment health initiatives, including screening, communication strategies, disability regulations, and specialty care services.Unfortunately, the clinical definition of "concussion/mild TBI" adopted by the Department of Defense and the VA — a blow or jolt to the head resulting in brief alteration in consciousness, loss of consciousness (lasting . . .
Hoge et al. (Wed,) studied this question.