title: Commentary.
authors.affiliation: Morton and Gloria Shulman Movement Disorders Clinic and the Edmond J. Safra Program in Parkinson's Disease, Toronto Western Hospital, University Health Network and the University of Toronto, Toronto, Ontario, Canada.
authors.forename: Anthony E
authors.initials: AE
authors.lastname: Lang
mesh_terms: D002540:Cerebral Cortex / Q000473:pathology*; D005121:Extremities / Q000503:physiopathology*; D006801:Humans; D008297:Male; D009207:Myoclonus / Q000473:pathology* / Q000503:physiopathology*; D013494:Supranuclear Palsy, Progressive / Q000473:pathology* / Q000503:physiopathology*