title: Writer's cramp: questions of causation.
authors.forename: Joel S
authors.initials: JS
authors.lastname: Perlmutter
authors.forename: W Thomas
authors.initials: WT
authors.lastname: Thach
mesh_terms: D001905:Botulinum Toxins / Q000494:pharmacology / Q000627:therapeutic use; D002531:Cerebellum / Q000473:pathology / Q000503:physiopathology*; D020821:Dystonic Disorders / Q000188:drug therapy / Q000209:etiology* / Q000503:physiopathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D009046:Motor Neurons / Q000502:physiology; D009047:Motor Neurons, Gamma / Q000187:drug effects / Q000502:physiology*; D009470:Muscle Spindles / Q000187:drug effects / Q000503:physiopathology*; D018482:Muscle, Skeletal / Q000187:drug effects / Q000294:innervation / Q000503:physiopathology*; D012021:Reflex, Abnormal / Q000187:drug effects / Q000502:physiology; D012026:Reflex, Stretch / Q000187:drug effects / Q000502:physiology
chemical_list: D001905:Botulinum Toxins