
Brian Duncan doesn’t know why his brain still works as well as it does. Duncan, 67, got his bell rung more than once during his life — as a professional football player, an amateur boxer and a bull rider at Texas rodeos. He remembers one time he got slammed into the ground by L.C. Greenwood, a 6-foot, 6-inch defensive end for the Pittsburgh Steelers, so hard that he hallucinated he was back playing high school football. “We used to play a team that had a feed lot behind their football stadium,” Duncan said. “I’m all of a sudden thinking I’m in high school. I’m seeing cows and stuff behind the stadium, and I’m thinking, what in the world? I’m in Three Rivers Stadium. I was in a different world.” Despite that history, Duncan is one of the lucky athletes whose past punishment has not caught up to him. Duncan and players like him highlight what continues to be a point of ferocious debate among brain researchers — the effect of repeated head trauma on both brain structure and the brain’s ability to think, remember and reason. He’s part of a recent study of National Football League (NFL) players that found no link between impaired brain function and either the number of concussions players received or the number of years they played in the NFL. Study… read on >