Few people think about traumatic brain injury (TBI) unless they have one or know someone with one. Sure, you’ve heard about people getting TBIs during deployment in a war zone. But surprisingly, the vast majority of TBIs in the military are actually diagnosed in noncombat settings such as motorcycle or car crashes, falls and sports-related incidents. Since 2000, more than 320,000 service members have been diagnosed with a TBI. And concussions — actually considered a mild form of brain injury — are the most common type.