title: Oculomotor involvement in myotonic dystrophy type 2.
abstract: Oculomotor function has not been studied in patients with myotonic dystrophy type 2 (DM2). We report the presence of rebound nystagmus in seven of eight patients with DM2 in the absence of a structural brainstem or cerebellar lesion. The rebound nystagmus observed in these patients is very suggestive of ocular myotonia, and examination of patients using video-Frenzel goggles may be a useful method for diagnosing myotonia of the extraocular muscles.
authors.affiliation: Davee Department of Neurology and Clinical Neurosciences, Feinberg School of Medicine, Northwestern University, 710 North Lake Shore Drive, Abbott Hall 1426, Chicago, Illinois 60611, USA. s-ajroud@md.northwestern.edu
authors.forename: Senda
authors.initials: S
authors.lastname: Ajroud-Driss
authors.forename: Robert
authors.initials: R
authors.lastname: Sufit
authors.forename: Teepu
authors.initials: T
authors.lastname: Siddique
authors.forename: Timothy C
authors.initials: TC
authors.lastname: Hain
mesh_terms: D000328:Adult; D000368:Aged; D004185:Disability Evaluation; D018450:Disease Progression; D005139:Eyeglasses; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009222:Myotonia / Q000175:diagnosis / Q000276:immunology / Q000503:physiopathology; D009223:Myotonic Dystrophy / Q000150:complications* / Q000503:physiopathology*; D009460:Neurologic Examination; D009759:Nystagmus, Pathologic / Q000276:immunology / Q000503:physiopathology; D015835:Ocular Motility Disorders / Q000175:diagnosis / Q000276:immunology* / Q000503:physiopathology*; D009801:Oculomotor Muscles / Q000276:immunology* / Q000503:physiopathology*; D012720:Severity of Illness Index