“…Many veterans with chronic pain and disability may also be affected by comorbid mental health conditions such as PTSD, anxiety, or depression or by TBI, which can have a negative effect on chronic pain and disability, further contributing to decreased physical function and risk for chronic disease. 10 ■ Traumatic brain injury TBI is a signifi cant problem among the veteran population, affecting approximately 20% of veterans, which can result from a direct impact to the skull, a blast injury (for example, improvised explosive devices), or an acceleration/deceleration injury. 14 TBIs can occur with either open or closed head injuries and range from mild, or concussion, to severe.…”