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Christopher Nowinski explains that big concussions in sports are finally being appropriately diagnosed, but 80-95% of the "littler" ones are still going undiagnosed.

Watch this witty video about the importance of always wearing a helmet when biking and skateboarding.

Most accidents happen a mile from home. But wearing a helmet and using the bike lane are key steps for prevention.

Concussions can be subtle and often invisible. That's why coaches, parents, and teammates need to have a high index of suspicion.

Taking the head out of football — and ice hockey and other contact sports — is easier said than done, but some rule changes would certainly decrease the number of sports-related brain injuries.

Multiple concussions versus a single concussion in sports elevate the need for expert medical advice before returning to play.

Yes, some sports could be safer — and should be — but not participating in sports at all is like being a boat that never sets sail.

Dr. David Hovda talks about the problems of misdiagnosis and how efforts to increase awareness and prevention could help athletes and soldiers.

"If you think you have a concussion, don't hide it, report it ... I didn't know it could get this bad."