I haven't seen it raised as a "standard" objection, but it has occurred to me quite a few times as a problem with the head-only approach.
What is interesting about this is that some people can't even imagine this being an issue whereas others can't imagine it not being an issue. To me it seems like a simple extrapolation from stem cell research and organ printing to regenerating the whole body.
Many approaches to cryonics assume that a detailed map of the neural patterns in a brain (via brain scanning technology) may be sufficient, using future technology, to bring that person "back to life." But cognition is greatly shaped by more than just the neural pattern: it is shaped by biology - by the body. (See Noe 2009; Pfeifer et al. 2006; Lakoff & Johnson 1999.)
I admit I'm pretty unfamiliar with the cryonics literature. I assume this is a standard objection, and has standard responses. Where can I find those responses?
Thanks!