Originally Posted by CashMan
No amount of restructuring or redesigning is going to stop your brain from hitting the inside of your head. Helmet design is going to go so far. It is kinda like tanker trucks, if they drive at a high speed and stop, the liquid in the tanks still moves. Add a solid piece of matter inside those tanks, and it will hit the walls of the tanks.
I don't disagree with the movement of the brain being in play but I do think there has to be some influence on direct impact.
Certainly there are concussions that have occurred from high force impact where the head hasn't really moved at all. Brandon McCarthy of the As took that liner right off the side of his head and it did serious damage without his head moving that much at all. Granted it's a little different and the force applied on contact is condensed into a single spot. This hit was pretty substantial and fractured his skull but I don't think it's unreasonable to look at this and wonder if a lesser blow that didn't cause a fracture would result in a concussion.
Can you stop the concussions from the brain rattling around? I dunno, you'd have to find a way to decelerate the entire head I would think. Probably not.
But that doesn't mean that research should be stopped on looking at other ways. If you could reduce the frequency of concussions (even by a small amount) by lessening direct impact, that seems like a good start to me.