Developing an objective tool that would allow doctors to judge the severity of a patient's Parkinson's disease has been difficult. The classification most widely used to stage disease severity is the Hoehn and Yahr Scale. This system puts symptoms into five stages:
U.S. News's featured content providers were not involved in the selection of advertisers appearing on this website, and the placement of such advertisement in no way implies that these content providers endorse the products and services advertised. Disclaimer and a note about your health.
