Updated August 4, 2015 This content is archived.
According to a study of retired NFL players, athletes who lose consciousness after concussions may be at greater risk for memory loss later in life. John J. Leddy, MD, clinical professor of orthopaedics, discusses the study’s reliance on players to report their own concussion history. “Retrospective recall of concussions by athletes is notoriously inaccurate,” he says.