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- From: tsf+@cs.cmu.edu (Timothy Freeman)
- Newsgroups: sci.cryonics,news.answers
- Subject: Cryonics FAQ 5: Neurosuspension
- Summary: This posting contains a list of Frequently Asked Questions
- and their answers about cryonics, the practice of carefully preserving
- very recently clinically and legally dead people in hopes that they can be
- revived in the future. It should be read
- Message-ID: <part5_725877379@cs.cmu.edu>
- Date: 1 Jan 93 08:36:40 GMT
- Article-I.D.: cs.part5_725877379
- Expires: Sun, 14 Feb 1993 08:36:19 GMT
- References: <part1_725877379@cs.cmu.edu>
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- Organization: School of Computer Science, Carnegie Mellon
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- Archive-name: cryonics-faq/part5
-
- Section 5: Neurosuspension
-
- (You can fetch cryomsg "n" by sending mail to kqb@whscad1.att.com or
- to kevin.q.brown@att.com with the subject line "CRYOMSG n". The index
- to this FAQ list is cryomsg "0018.1".)
-
- 5-1. What are the pros and cons of neurosuspension (only freezing the head)?
-
- (The next two paragraphs are taken from CRYOMSG 6.)
-
- An undisputed advantage of the neuro option (over whole body) is cost,
- both for suspension and for maintenance (liquid nitrogen required to
- remain frozen). Another advantage is the quality of perfusion with
- cryoprotectants attained during suspension. Each organ has its own
- optimal perfusion protocol and when the suspension can concentrate on
- the head only, the quality of perfusion of the brain does not have to
- be compromised to attain better perfusion of other parts of the body.
- Another important advantage of the neuro option is mobility. Whole
- body suspendees are stored in large, bulky containers that are hard to
- transport whereas the neuro suspendees are stored in a concrete vault
- on wheels that can be quickly hauled away in case of fire or other
- emergency. (Also, if necessary, they can be removed from the large
- vault and transported in smaller units that fit into a van.)
-
- An obvious disadvantage of the neuro option is bad PR; it sounds
- gruesome. Also, one would think that revival (as a whole,
- functioning, healthy human being) when only your head was preserved
- would be more difficult than if your entire body was preserved.
- However, the whole body situation may not be that much better. Mike
- Darwin of Alcor noticed several years ago, when examing two suspended
- people being transferred from another organization to Alcor, that
- every organ of their bodies suffers cracking from thermal stress
- during freezing. In particular, the spinal cords suffered several
- fractures. Thus, the whole bodies were not quite as "whole" as most
- people assumed. Another reason that a whole body may not offer much
- more than the head alone is that the technology required to revive
- people from (whole or neuro) cryonic suspension should also be able to
- clone bodies, which is much simpler than fixing damaged cells. One
- possible objection to this approach of recloning a body to attach to
- the head was voiced by Paul Segal of ACS (in the April 1988 issue of
- The Immortalist). He suggested that adult cells in the head may be
- missing some of the DNA needed to reclone the remainder of the body.
- Even if this objection is valid, it is easy to circumvent by storing
- samples of all the major organs with the preserved head (which is
- standard practice at Alcor).
-
- If the technology for suspension improves enough to make it
- possible to store a body without much damage, that might tilt the
- ideal tradeoff away from neurosuspension if the stored body is easily
- repairable.
-
- See the booklet "Neuropreservation: Advantages and Disadvantages"
- published by Alcor for a more thorough discussion.
-
- 5-2. How many people have chosen neurosuspension over whole-body
- suspension? (This question has only a partial answer.)
-
- The different organizations market neurosuspension differently, so
- the answer depends on which organization you have in mind.
-
- >>>Question sent to alcor@cup.portal.com on Wed Jul 29 1992<<<
-
- As of June 20, 1992, Alcor had 271 suspension members and 22
- members in suspension. I don't yet have information about how
- many of the suspension members have chose neuropreservation.
-
- ACS has six whole bodies, two heads, and two brains in cryonic
- suspension. They can do neurosuspensions, but they do not promote the
- option. Art Quaife estimates that less than 20% of the living
- members of ACS have chosen neuropreservation.
-
- The Cryonics Institute does not do neurosuspensions.
-