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JulianMorrison comments on This Didn't Have To Happen - Less Wrong
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Also, don't bother with whole-body preservation. It's useless, because regrowing a body is the least of revival problems, and it's harmful, because your brain spends longer warm while the whole useless hunk of meat attached to it is cooling down. Plus it costs more.
I'd feel more comfortable with that if we knew more about the extent to which the glial cells around the heart -- not to mention the remainder of the nervous system -- play a role in learning, decisionmaking, emotion etc. I'd hate to lose any non-recoverable data from those systems and have to recreate it, e.g. learning to walk again or being missing emotional reactions, or who knows what else. I think I'd want to keep the "useless hunk of meat" around, just in case, even if it had to be separated from the head for better cooling.
If they did play such an important role in human thought, wouldn't you expect there to be case studies of people who become psychologically impaired after heart surgery (in particular, the installation of an artificial heart)?
CI only offers full-body, but it's cheaper than Alcor's neuro option.