We are focusing on concussions and traumatic brain injuries.

The subject is putting the NFL at the center of a debate about the future of contact sports.

Click the links below to learn more about the topic.

* What is a concussion?

* Signs of a concussion

* Treasure Coast team recognized for playing 'smarter football'

* Guidelines

* Football great Joe Namath discusses traumatic brain injuries

* Exclusive: Joe Namath shares his thoughts about the NFL and its policies to protect players

* Local doctors are investigating new ways to reverse brain injuries

* Local doctors hope to help reverse brain injuries

* Blood test