Your brain doesn’t stop working when you sleep or are under. Your physiology keeps going.
Killing and freezing a person kills them. You can’t revive someone after doing that.
We’re unable to do piece-by-piece replacements of the brain(stem) so not much to argue about there. But if we could, it’s probably still you since you’re the continuation of your biological processes, which doesn’t get interrupted, just modified.
There’s plenty of examples of people who have drowned under the ice, been dead for many (most I can remember is around 30) minutes, and have been revived. We’re talking about people that have had no heartbeat and no brain activity for a prolonged amount of time. I would definitely argue that they’re the same “life” when they wake up.
With such “revivals” they weren’t fully dead yet. They would be, if nobody intervened.
Human bodies are irrecoverable once life fully ceases. Before that happens revival is still possible. Afterwards, it isn’t.
There also have not been any revivals after brain activity stops. Once neurons stop firing (which happens on cell death), no revival is possible anymore. At that point, death is permanent.
Under anaesthesia like propofol your brain literally pauses, when you wake up you are typically confused because it’s like you were literally paused and resumed
Hamsters and other small animals can be and are regularly frozen and unfrozen
Propofol slows down your brain and changes several “rhythms”, but your brain activity does not cease at any point. To your conscious self it may appear as if you’ve “paused”, but this is absolutely not the case.
Hamsters and small animals can be partially frozen and unfrozen. Once fully frozen (or close to it) they can no longer be revived. Once brain cells die, they cannot be revived.
His study showed that every animal in which 15% or less of the body water had been frozen recovered completely. Two-thirds of those in which 15 to 40%, and one-third of those in which 40 to 50% of the water had been frozen were fully resuscitated and survived long periods.
Hamsters in which 55 to 70% of the water had been frozen subsequently recovered heart beats and breathing but not consciousness, whereas when 76% of the body water had been in the form of ice resumption of heart beat was the only sign of life.
Your brain doesn’t stop working when you sleep or are under. Your physiology keeps going.
Killing and freezing a person kills them. You can’t revive someone after doing that.
We’re unable to do piece-by-piece replacements of the brain(stem) so not much to argue about there. But if we could, it’s probably still you since you’re the continuation of your biological processes, which doesn’t get interrupted, just modified.
There’s plenty of examples of people who have drowned under the ice, been dead for many (most I can remember is around 30) minutes, and have been revived. We’re talking about people that have had no heartbeat and no brain activity for a prolonged amount of time. I would definitely argue that they’re the same “life” when they wake up.
With such “revivals” they weren’t fully dead yet. They would be, if nobody intervened.
Human bodies are irrecoverable once life fully ceases. Before that happens revival is still possible. Afterwards, it isn’t.
There also have not been any revivals after brain activity stops. Once neurons stop firing (which happens on cell death), no revival is possible anymore. At that point, death is permanent.
Under anaesthesia like propofol your brain literally pauses, when you wake up you are typically confused because it’s like you were literally paused and resumed
Hamsters and other small animals can be and are regularly frozen and unfrozen
That’s literally not how it works.
Propofol slows down your brain and changes several “rhythms”, but your brain activity does not cease at any point. To your conscious self it may appear as if you’ve “paused”, but this is absolutely not the case.
Hamsters and small animals can be partially frozen and unfrozen. Once fully frozen (or close to it) they can no longer be revived. Once brain cells die, they cannot be revived.
Of course total brain activity cannot completely pause, but that’s the effect on your consciousness
You got a link to read about these hamsters? My understanding is we had progressed well past this point
https://royalsocietypublishing.org/rspb/article-abstract/145/920/427/30027/Studies-on-golden-hamsters-during-cooling-to-and
… 1956
Well yeah, we haven’t really been in the business of freezing hamsters regularly since they end up braindead pretty quickly.