the brain can cause for two major reasons and you guys hit on both of them one is that the blood flow is blocked by a clot that a clot comes from somewhere or it's formed in the Blayne and it prevents the blood from flowing into the brain the other cause of stroke is a blood vessel that ruptures so then you either get bleeding into the brain or around the surface of the brain and you can imagine those are very different problems right a blood vessel that's blocked up with a clot we're going to approach that very differently than we