title: Teaching video NeuroImage: the "Fonzarelli" sign: focal thumb dystonia as an early manifestation of Parkinson disease.
authors.affiliation: Department of Neurology, West Wing Level 3, John Radcliffe Hospital, Oxford OX3 9DU, UK. turnermr@doctors.org.uk
authors.forename: Martin R
authors.initials: MR
authors.lastname: Turner
authors.forename: Lucy
authors.initials: L
authors.lastname: Matthews
authors.forename: George C
authors.initials: GC
authors.lastname: Ebers
mesh_terms: D000368:Aged; D004421:Dystonia / Q000503:physiopathology*; D006801:Humans; D008297:Male; D010300:Parkinson Disease / Q000503:physiopathology*; D013933:Thumb / Q000503:physiopathology*