DEAR DOCTOR K: My kids play contact sports. After all the news about how repeated concussions might cause permanent brain damage, I'm worried. Do doctors understand why the brain damage occurs and how to prevent it?
DEAR READER: People have known for a long time that boxers could develop difficulty with thinking, remembering, balance and mood following the end of their careers. The term "punch-drunk" was often used. After all, they're getting hit in the head constantly and are often knocked unconscious.