Coup-contrecoup

A coup-contrecoup injury occurs when the brain hits the side of the skull at the impact site and then bounces to hit the opposite side, causing dual-site bruising. This internal bouncing is a direct result of the "slosh" space inside the skull.

Bottom Line: This internal bouncing is caused by "slosh" space; the Q-Collar's mechanism of action helps limit the brain from bouncing into the interior skull wall after a hit.

FAQ

The brain is bruised at the point of impact and on the opposite side.

Yes, sudden acceleration/deceleration can cause the brain to bounce inside.

It fills extra skull space with blood to minimize the bounce room.