In the Dutch edition the subject of visualisation and regeneration came up. I mentioned having read about children being able to regenerate lost finger tops, but until now I never checked for sources.
I consulted with Google. Well... it seems possible. Here are some links, look for more with Google, and especially scholar.google.com for scientific publications:
- "[...] in the very young, a certain amount of regeneration occurs to compensate for lost tissue", Med J Aust. 1979 Dec 1;2(11):580-2
- Possibly an adult? Case report: "the distal phalanx generated to give an excellent functional result", J Hand Surg [Br]. 1993 Apr;18(2):230-3
- Torture on monkeys. "The new structures were cosmetically pleasing as in the human instances", Anat Embryol (Berl). 1987;177(1):29-36.
Visualisation not even needed.