He said he was taken aback by the severity and the extent of the changes found in the brains of the former football players. "We had about two thirds of our players show very significant brain changes," he said. He found significant cortical thinning among the football players. (Brian McHugh/CBC)Connelly said comparing the results with the age-matched control subjects showed the changes were not caused by normal aging. What needs more research, he said, is what makes the minority of players who didn't show the brain changes different.

Source: CBC News September 04, 2017 01:07 UTC