The fragile brain

Kelly Crowe's The National item on what doctors know about the fragile brain and concussions
If the brain shakes, it can suffer a concussion, and merely thinking too hard can cause further damage 2:40

It's hard to know exactly how many Canadians suffer sports-related concussions every year because concussions are not always easy to diagnose.

But when you get up close and personal with a brain — it's not hard to see why it's so fragile. Or why taking a concussion seriously is so important.

Kelly Crowe has this report.   (runs: 2:40)