Dr. Carlin Senter, UCSF Primary Care Sports Medicine physician, discusses the rising concern about sports related concussion. Learn the definition and symptoms of concussion and review the evaluation of sports concussion used by athletic trainers and physicians on the sideline in local high schools and professional teams. Senter explores the management of sports related concussion and discusses long term implications of concussion, pondering the question: how many concussions is too many? (#27887)