Andrew Huberman· PhD
one of the interesting features in terms of shock absorption that hopefully prevents a lot of traumatic brain injury is the fluid sheath around the brain the the brain you may know is um it's mostly fat it floats in salt water in our brains so our brains are all floating in in salt water and so with rapid acceleration deceleration that sheath of salt water adds a marvelous protective cushion against development of you know bruising of the brain say or bleeding in the brain