Hi again, Sandy - I'll let Joao Paulo speak for himself as to why he was asking, but I'm guessing it's because STN does seem to help with dystonia, which may be causing the diaphram rigidity. It also helps considerably with rigidity in the limbs, so I suspect it might positively affect the diaphram. If you'd like more info about DBS, feel free to write me. Margie << Yes have briefly considered DBS: but chickened out on the day of surgical consult. You see for the first eight years of having pd I had to rely on my emotional strength for a I was misdiagnosed as psychosymatically causing my symptoms. I have a fear that something would go wrong and I would lose my mental capabilities. There is always a risk. I would be interested in knowing the reason you are asking? Thanks so much for the question> >>