I was reading about cryonic preservation recently. In a separate place on the Internet, I've read that once brain activity stops and brain death occurs, the person is dead with no hope of recovery. Surely, if the latter information is correct, methods of preservation would have to somehow address that, right? Once brain activity stops, then is it actually impossible for that person to recover, even if the cells themselves have not been damaged? If so, why?

  • $\begingroup$ Can you add your sources? $\endgroup$ – AliceD Dec 9 '19 at 23:36

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