The Movement Disorder Society (MDS)
MDS is an international professional society invested in the research and care of patients with Movement Disorders, including Parkinson's disease, Parkinsonism, Dystonia, Chorea, Huntington's disease, Ataxia, Tremor, Myoclonus, Startle, Tics, Tourette syndrome, Restless legs syndrome, Stiff Person's syndrome and Gait disorders
Link to The Movement Disorder Society Home Page