MSNBC NOW With Alex Wagner July 9, 2013
Way we are Walking Around an such, or even bumping your head. Its no big deal because the axons can take that. If the movement is very violent, it stretches the axons and this causes injury to the wall. If the movement, which is more violent, is relatively mild, the injury is repaired by the axon and theres no problem. And then there is a gradual increase in force until you get Something Like an Automobile Accident where, you know, you run into something and your head goes forward and hits the panel. That force is so great that it will injure these axons and they will not be able to be repaire...