Health Usha Lee McFarling and Ike Swetlitz Tom Brady reportedly had a concussion. What does that mean? Your guide to the latest science
Exclusive David Armstrong ‘Snitch rule’ requires college athletes to report teammates with concussions
In the Lab Usha Lee McFarling Huge studies peer inside brain, blood to unlock mysteries of concussion
Health Bob Tedeschi Sideline doctors: How the NFL’s concussion-spotting system is — and isn’t — working
Health Bob Tedeschi and Ike Swetlitz NFL union urges players to see ‘Concussion,’ but warns ‘it is scary’