Cruciatus = nerve regeneration?

[zephyrjaid7]

I've been toying with an idea for a fanfic that involves extensive 
medical magic, and I began to think about the limitations of magic. 
More specifically, how magic could regenerate nerves to ultimately 
reverse conditions like paralysis and blindness.  

Cruciatus is the only spell we really know of that directly effects 
the nervous system, by somehow causing pain. We know that 
overexposure to the curse causes memory loss, probably because of the 
constant exposure to stress hormones such as cortisol and adrenaline 
(which kills nerve cells and causes memory loss). This suggests that 
the spell tricks the mind and then subsequently causes other physical 
reactions not associated with the spell itself, like inducing the 
stress hormones. On the other hand, the spell could have real, 
tangible effects on the nerves and could cause a vast array of 
problems within the body and mind. What does canon evidence point to?
(On a side note, I'm a little baffled by the 
insanity - was this caused by psychiatric drugs or the torture 
itself?) 

Now, if the spellcaster were to use Cruciatus on a person with nerves 
that were already damaged, what would happen? Is it possible to 
regenerate the nerves by shocking the nerve cells into lining up and 
reconnecting? Since the spell's sole purpose is to effectively cause 
pain, would the spell 'fix' something to make the spell work or would 
it fail(assuming the effects are tangible, but then how could they 
NOT be?)? And where do the electrical impulses come in, assuming that 
1) magic somehow consists of some kind of electricity and 2)the 
Cruciatus Curse has a huge electrical charge considering that its 
sole focus is on the nerves?  

How could this work?

If anybody has any ideas or input, please do speak up. :) I've always 
been vaquely fascinated by the Unforgiveable Curses and I've always 
wanted to write about them but couldn't put them into an interesting 
context, so feel free to tell me if I'm crazy or give suggestions 
(hint). 

Thanks!
Zeph, nearly in an insomnia-induced coma (so forgive the crazy 
thoughts that probably don't make sense)