Military clinicians regularly examine personnel with posttraumatic stress (PTS), concussion, and/or mild traumatic brain injury (mTBI). For example, when a service member has suffered head injury and the loss of a comrade due to an explosive device, it may be difficult to determine which of the patient's problems originate from psychological reaction to traumatic stress versus organic medical conditions arising from head injury.There is debate concerning the respective contributions of these problems to observed symptoms and deficits. It is outside the scope of this review to settle this complicated issue.
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