title: Fourth nerve palsy unmasked by botulinum toxin therapy for cervical torticollis.
authors.affiliation: Departments of Neurology, University of Pennsylvania Health System, Pennsylvania Hospital, Philadelphia, PA 19104-4283, USA.
authors.forename: J
authors.initials: J
authors.lastname: Varrato
authors.forename: S
authors.initials: S
authors.lastname: Galetta
mesh_terms: D000368:Aged; D002574:Cervical Vertebrae; D004172:Diplopia / Q000209:etiology*; D005260:Female; D006801:Humans; D014103:Torticollis / Q000188:drug therapy*; D020432:Trochlear Nerve Diseases / Q000150:complications* / Q000503:physiopathology*