Flickr - torbakhopper

Earlier this week, Chris Borland, a top rookie in the National Football League last season and a San Francisco 49ers linebacker, made a rather surprising decision. After one year in the pros, he decided to step away from the sport and call it quits. His explanation was concern about the long-term effects of trauma to the head and the reality of concussions.

Michigan has launched a new website to educate athletes, parents and coaches about the symptoms and consequences of sports concussions.

Student athletes who show signs of a concussion must be removed from games immediately under a law that takes effect Monday.