We are hearing a lot about concussions in the news these days. To the recent disbelief of sports commentators and fans, a University of Michigan football coach left a 20-year-old quarterback in a game after a blow to the head despite his stumbling in the field immediately after impact. Meanwhile, NFL players have regularly been making the news for, to put it delicately, behaving badly. There is speculation that some of the domestic violence in which these players have engaged may be the result of head trauma, a hypothesis deemed plausible by a University of Pennsylvania professor known as a “neurocriminologist.” The fact remains, however, that concussions are traumatic brain injuries. Although most patients with concussions are expected to recover fully, young children and teens, because of their developing brains, along with the elderly, are most vulnerable to the effects of concussion. Thus, these children will need careful monitoring as they return to school and other activities.