That's our musculature getting "out of synchronicity" At the celluar level it's the protien system actin-myosin "normal" muscle synchronicity. We literally tear up our bodies muscular mechanism where the brain just can't talk to get the muscle fibers to slide over each other in a concerted way the way normal people can't imagine. It can cause any muscle pair in any part of the body to bring about negative skeletal-muscle-tendon changes. That's why so many of us look pushed and pulled in the face (our parkie "mask"). Dystonia presents to a neurologist as "heavy as lead" arms and "cogwheeling"; patients are often confined to a wheelchair by spinal disorders, caused by, you got it. Year and years of dystonic musculature leaves us with an ever progressive, ever more debilitated state. So bite the bullet, and take drugs that you know works to minimize the "attack events" where we never want to be seen in public undergoing. Some PWP have a chronic nerve damage, often a lifetime "pain in the neck, or an inability to walk for periods caused by bone-nerve-joint misinteractions. For god's sake, figger it out already, find some neurons that will re-establish the sometimes feet long nerve to nerve cell to musculature synchroic communication pathways OPEN SESAME.