College football players' brains examined

A small study of college football players finds that the areas of their brains that control memory were smaller than average, especially if they had suffered concussions.

But more research is needed to determine if the differences mean they're headed for problems down the road.

The differences were seen in a part of the brain affected by a destructive disease linked with head blows.

The disease has been found in autopsies of some former NFL players.