You know, sometimes I think the fandom as a whole spends waaaaaaaay more time and effort thinking about these things than JKR does.

The limb question is interesting. I'm assuming that if Moody polyjuices into someone with two legs, he'll regrow his leg. How does that affect his phantom pain? Has the wizarding world found an effective way to deal with that problem? Because my dad's remaining pain seems to be mainly neurological, so I wonder.

I'm really kind of curious as to how the wizarding world deals with neurological issues in general. Even with magic, messing around in the brain seems dodgy.