title: Direction of tremor oscillation in spiral drawings reveals proximal versus distal muscle involvement.
authors.forename: Xuguang
authors.initials: X
authors.lastname: Liu
authors.forename: Peter G
authors.initials: PG
authors.lastname: Bain
mesh_terms: D020329:Essential Tremor / Q000503:physiopathology*; D006236:Handwriting; D006801:Humans; D018482:Muscle, Skeletal / Q000503:physiopathology*; D009949:Orientation / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*