title: Pendular nystagmus in patients with peroxisomal assembly disorder.
abstract: BACKGROUND
  Pendular nystagmus commonly occurs in congenital and acquired disorders of myelin.
  
  
  OBJECTIVE
  To characterize the nystagmus in 3 siblings with an infantile form of an autosomal recessive peroxisomal assembly disorder causing leukodystrophy.
  
  
  METHODS
  We examined visual function and measured eye movements using infrared oculography. We noted changes in eye speed and frequency before and after the administration of gabapentin to 1 patient.
  
  
  RESULTS
  All 3 siblings showed optic atrophy and pendular nystagmus that was predominantly horizontal, at a frequency of 3 to 6 Hz, with phase shifts of 45 degrees to 80 degrees between the oscillations of each eye. Gabapentin administered to 1 child caused a modest improvement of vision and the reduction of the velocity and frequency of oscillations in the eye with worse nystagmus.
  
  
  CONCLUSIONS
  The pendular nystagmus in these patients was due to their leukodystrophy and may have a similar pathogenesis to the oscillations seen in other disorders affecting central myelin.
authors.affiliation: Department of Neurology, University Hospitals of Cleveland, Ohio 44106, USA.
authors.forename: A A
authors.initials: AA
authors.lastname: Kori
authors.forename: N H
authors.initials: NH
authors.lastname: Robin
authors.forename: J B
authors.initials: JB
authors.lastname: Jacobs
authors.forename: D M
authors.initials: DM
authors.lastname: Erchul
authors.forename: O O
authors.initials: OO
authors.lastname: Zaidat
authors.forename: B F
authors.initials: BF
authors.lastname: Remler
authors.forename: L
authors.initials: L
authors.lastname: Averbuch-Heller
authors.forename: L F
authors.initials: LF
authors.lastname: Dell'Osso
authors.forename: R J
authors.initials: RJ
authors.lastname: Leigh
authors.forename: A B
authors.initials: AB
authors.lastname: Zinn
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005133:Eye Movements / Q000502:physiology; D005260:Female; D005808:Genes, Recessive; D006801:Humans; D008297:Male; D009759:Nystagmus, Pathologic / Q000235:genetics*; D009896:Optic Atrophy / Q000235:genetics; D018901:Peroxisomal Disorders / Q000235:genetics / Q000503:physiopathology*; D015351:Vision Screening