Each year, approximately 17 million people suffer from traumatic brain injuries (TBI). Around 80 percent of sufferers will be treated and eventually released, but they often continue to experience long-term symptoms. Brain injuries that involve emotion, thinking abilities, language, and sensation are well-recognized. However, researchers now believe that they may have uncovered yet another residual symptom—one that could actually exasperate the other, more known symptoms. TBI and Excessive Daytime Sleepiness [...]