The prevalence of concussions in many contact sports — especially on the football field — concerns many experts and casual observers. What is the current state of medical knowledge on concussions? What do parents and coaches need to know about them to avoid lasting injury?
Margaret Hagberg, mother of injured high-school football player Billy Hagberg.
Tom Goldman, NPR sports correspondent.
Gerry Gioia, director, Pediatric Neuropsychology Program and Safe Concussion Outcome, Recovery & Education (SCORE) Program at Children's National Medical Center.