A significant data point here is that organ transplants -- including those of entire limbs -- have been made to work already. This indicates that the wiring in general cannot be so specific as to be impossible to replicate or regrow without originals.
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!