"in the 1970s, after a long series of experiments, White performed a transplant of one monkey head onto the body of another monkey, although it lasted just a few days. These operations were continued and perfected to the point where the transplanted head could have survived indefinitely on its new body, though the animals were in fact euthanized. The problem with this operation is that since no one currently knows how to repair nerve damage which would arise when the spinal cord is severed during the head transplant process, the recipient would become paralyzed from the neck down.
The transplanted heads can see, think, feel, and taste and in short can function in all the ways that they could when attached to their original body, they simply cannot control their new one. The importance of head transplants is that if performed in humans they have the potential to save lives from almost any disease. Anything that afflicts the non-head regions of the body, be it otherwise inoperable non-brain cancer, multiple organ failure, heart disease, diabetes, etc will be removed if the head is transplanted to a non-afflicted body. If one is paralyzed already and has these illnesses, then nothing much would really change when the head is transplanted. If one is not paralyzed, then one would have to decide whether to live paralyzed until a cure for paralysis can be developed, or to die of one's affliction. The bodies could be obtained through organ donors as is already the case with heart, lung, and kidney transplants. See the articles titled whole-body transplant and head transplant for more information.
White has also pioneered now widely-accepted spinal cord and brain cooling techniques, which now allow for therapeutic procedures not previously possible. For 40 years, he was a neurological surgery professor for Case Western Reserve University medical school, but is now retired."