For Memory Issues, It's Not So Much The Concussion As The Blast April 30, 2018 Researchers at TRACTS have been able to control for the veterans’ common comorbidities, such as sleep disorders, PTSD and chronic pain, to tease out the impact of blast exposure on brain physiology and function. Click here to read the full article in U.S. Medicine. Read more about For Memory Issues, It's Not So Much The Concussion As The Blast