Because of better diagnostic tools and techniques, many other combat zone injuries could now be measured as well. These included over a quarter million cases of traumatic brain injury (more commonly called concussion) and over a hundred thousand cases of PTSD (Post Traumatic Stress Disorder) that were discovered among combat veterans since 2001.
In the past these conditions were not considered “wounds” in the same sense as something that made the victim bleed. This was despite the fact that many soldiers were put out of action temporarily because of concussion and PTSD.
Physical injuries to the brain can now be detected using more precise instruments like MRI and can often be treated. In the last decade it has become clear that there are several sources of PTSD (post-traumatic stress disorder) and concussions from explosions were more of a factor than previously thought. Many troops, because of exposure to roadside bombs and battlefield explosions in general, developed minor concussions that, like sports injuries, could turn into long term medical problems.
Often these concussions were accompanied by some PTSD. Examining medical histories of World War II, Korea, and Vietnam War vets showed a pattern of later medical problems among many concussion victims. The same pattern has been found among athletes and accident victims who suffered concussions.