On the other side of the coin, I think people should be allowed to opt-in to such an experiment if they are fully informed and not being financially coerced. E

On the other side of the coin, I think people should be allowed to opt-in to such an experiment if they are fully informed and not being financially coerced. E.g., if someone's body is dying and they want their brain to live a little longer, and they need several extra days to finish saying goodbye to their loved ones. But there would need to be a ton of anesthesia and other calming drugs given both during and the entire time after surgery. I don't think that experiments like this should be off the table if needed for progress as a civilization, but I think we can't force very lucid animals into these experiments and not give them anesthesia. The experiment itself isn't necessarily good or bad, but forcing a lucid animal into this even if it expresses fear or wants to flee is wrong.