Traumatic brain injury (TBI) doesn't sound like a hidden health problem. The name alone gives us vivid images of war explosions, head wounds, and extended hospital stays. But a long-brewing discussion about concussion in the National Football League (NFL) is raising awareness that TBI isn't always as obvious as we imagine.
75 former NFL players are now suing the league for concealing the long-term risks of the concussions that often happen in pro football.
These NFL players say that, over...
