A recent incident that made international headlines demonstrates the severity of an unexpected head injury. On August 24, 2015, 37-year-old Justin Wilson—a longtime IndyCar driver—succumbed to a severe head injury, leaving behind his wife and two young children. He had been in a coma since a freak accident occurred the day before during a race on the Pocono Raceway in Pennsylvania. Toward the end of the 200-lap race, the lead [...]