Bicycling Magazine recently published Bruce Barcott's very well researched article about helmet standards, helmet design and concussion in cycling. The article features an adaptation (used with permission) of the Medicine of Cycling Concussion Assessment Chart. An excerpt from the article:
"Bicycle helmets do an outstanding job of keeping our skulls intact in a major crash. But they do almost nothing to prevent concussions and other significant brain injuries—and the very government agency created to protect us is part of the problem. The time has come to demand something safer."
You can read the full article on the Bicycle Magazine website at www.bicycling.com/senseless