Great post DP. I am not a doctor or a scientist, but I did stay in a Holiday Inn Express last week. All joking aside a concussion is a very serious injury that until the last ten years was often overlooked in all sports. Getting your "bell rung" was part of sports.
I too have suffered at least 5 diagnosed and one self diagnosed concussions in my 52 years on this earth; however none came from helmet to helmet contact. Three occurred on the football field, one on the wrestling mat, one at work, and the undiagnosed one in a dirt bike wreck.
When I think about each of these incidents I realize they all had one thing in common. My head bounced violently off the ground. The two most serious concussions did not involve head protection (wrestling and work).
I started playing football at the age of 6. I was always the runt on the field and as a few posters that know me can attest I never backed away from contact. What I did do was learn to tackle properly and avoid taking direct hits on offense. We did not have the best equipment in the early seventies through the early eighties, so I guess I was fortunate. Two of my three football concussions occurred while being tackled and the other was a result of a behemoth knocking me backwards in the air causing me to do the Nestea plunge.
The wrestling incident resulted from a tussle that went off the mat and onto the gym floor. No foul play just two guys going at it. The work related one was the worst and cost me an overnight in the hospital. While trying to secure a subject, my partner and the detainee both crashed on top of me causing my head to meet pavement.
Please stick with me I have a point. To my knowledge a concussion is an injury to the head where the brain basically bounces of the skull. For this reason and my personal examples I do not think any form of head gear will eliminate a concussion. Simply put the head makes a sudden stop and guess what the brain hits the skull. Better helmets could reduce the severity, but stop concussions, no way. Think of a bullet proof vest. It prevents death, but the impact still hurts. The main issue regarding concussions or head trauma is prolonged exposure.
The only way to avoid concussions in any sport is to eliminate contact. That inlcudes football, soccer, basketball, lacrosse, baseball, basketball and yes cheerleading. Maybe the answer is to only allow kids 18 and over to play contact sports.
By the way, falls, being hit by an object (non sports related), and car accidents are the leading causes of concussions. Should we ban walking, driving, and existing. I am not sure, but if people clearly know the risk they should have the right to participate. Heck, this may sound stupid, but even with the severe dangers of sexually transmitted diseases kids still go at it unprotected. Should we ban sex? There is no real good answer here. Football will be extinct in a few years and so to will others. Its just the way we have evolved.