a wife of a returning combat veteran called ems because her husband is complaining of constant headaches. when you ask about post-traumatic stress disorder (ptsd) or traumatic brain injury (tbi), she states that the patient was injured by an improvised explosive device in iraq, but cannot remember the event. she explains that the patient has undergone numerous cts and mris of head and has been told by his family doctor that there is no sign of injury. regarding these medical conditions, you realize that:
