For Parkinson, anulom vilom (alternate breathing) bhramari (humming bee) and Aum sound are good. But it will be nice to give him/her some brain nourishing herbs like Shankhapushpi, Brahmi, Ashwagandha too. This will show results faster. Also anti vata diet, which means, no cold, dry and wind forming foods. Diet should be warm, liquid type (like soup) and lubricated with some ghee or oil on top (not deep fried). Full body oil massage with sesame oil will also be helpful.