Coup contrecoup. Basically the brain bounces back and forth both in the direction of the impact and the opposite direction. When your head gets hit hard enough, your brain sloshes around in your skull like water splashing in a tub. If the moment is more complex, it could even bounce in more directions.
Headbutting a pipe damages the back of the head more than the impact point and surrounding area?
How?
Why?
Who?
Coup contrecoup. Basically the brain bounces back and forth both in the direction of the impact and the opposite direction. When your head gets hit hard enough, your brain sloshes around in your skull like water splashing in a tub. If the moment is more complex, it could even bounce in more directions.