I can't remember all the details, but something similar happened to Colin Fletcher in his 70's or so - he made it a good deal of the way back, and his injuries included head trauma. There should be some news stories or Backpacker magazine stories about it, as I recall.

I'd bet there's a good chance that you'll come most, if not quite all, the way back and be able to enjoy everything you did before the accident.

Good luck, take care, and keep us posted.