Kevin McGehee is concerned about someone in cryonic suspension somehow retaining consciousness and going mad, like someone in a perpetual sensory deprivation chamber.

I’m not, for at least two reasons.

First, the suspendee is given a heavy dose of barbiturates to prevent any pain that occurs during the temporary resuscitation necessary to circulate the anti-freeze. Since the body doesn’t metabolize in suspension, this drugged state would persist until the body is repaired and revived.

Second, I find the notion that a body frozen at that temperature, with no ability for synapses to fire, could possibly have any consciousness at all to be much more unlikely than even the prospects for future reanimation.

There may be some good reasons not to be suspended, but this isn’t one that I would even consider.