Is there anay specific difference between the two body postures? (if we can even call them 'postures', which I doubt)
And, as a natural disorder which one is used? (I thought "Hunched" would be the right word, from the film "The Hunchback of Notre Dame"...)
I have a hunch that corum is no slouch at vocabulary.
Re your back: Given that your left left was almost paralysed and you've had an operation, I wouldn't really like to comment. There are so many factors - though I will say that muscle spasms don't normally cause paralysis. No doubt you've got a badly pinched nerve. Sorry I can't help.
YouTube - Kathi Béla polszkicipelés
I know this guy personally. Mad!