text: why is brain transplant not possible?   it is actually possible, but you really, really would not want it: they can take a brain out of the casing, but think of it, they'd have to cut all nerval connections to the body: eyes, spine etc.  the brain might conceivable be kept alive, properly fixed to a machine that pumps oxygenated and nutrient-enriched blood to the brain, but what would you do then? this actually has been done to a few pitiful lab animals. you would definitely need to hook the brain up to a body again, it would need hormonal regulation (we cannot completely reproduce the body in a lab) but how would you do that in any meaningful way? you would end up with a brain hooked up to the circulation system of a prone body without any sensory or muscular connection - we cannot yet get nerves to reconnect as we want them, else spinal cord injuries could be fixed. so you'd only end up with a terminally isolated brain without any sensory input and without any ability to communicate - sheer hell. for all practical purposes, you'd have a body and a brain worse than dead.