Andrew Huberman· PhD
So I know that they've been studied, I'm not sure if it's in the military. We mentioned the woodpecker or the contrecoup injury. So that obviously. - The head jolting back and forth and the brain basically slamming up against the front of the skull. - So- - Football, heading the ball in soccer, definitely people who use the 50 caliber in military, although that's a fairly small population. And I think anyone that's hit their head hard more than once.