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The Cerebellum

, Volume 13, Issue 3, pp 411–413 | Cite as

Rebound Upbeat Nystagmus After Lateral Gaze in Episodic Ataxia Type 2

  • Hyo-Jung Kim
  • Ji-Soo KimEmail author
  • Jae-Hwan Choi
  • Jin-Hong Shin
  • Kwang-Dong Choi
  • David S. Zee
Case Report

Abstract

Rebound nystagmus is a transient nystagmus that occurs on resuming the straight-ahead position after prolonged eccentric gaze. Even though rebound nystagmus is commonly associated with gaze-evoked nystagmus (GEN), development of rebound nystagmus in a different plane of gaze has not been described. We report a patient with episodic ataxia type 2 who showed transient upbeat nystagmus on resuming the straight-ahead position after sustained lateral gaze that had induced GEN and downbeat nystagmus. The rebound upbeat nystagmus may be ascribed to a shifting null in the vertical plane as a result of an adaptation to the downbeat nystagmus that developed during lateral gaze.

Keywords

Gaze-evoked nystagmus Rebound nystagmus Lateropulsion Episodic ataxia 

Notes

Conflict of Interest

On behalf of all authors, the corresponding author states that there is no conflict of interest.

Supplementary material

Supplementary video 1

Gaze-evoked and downbeat nystagmus during lateral gaze and rebound upbeat nystagmus on resuming the straight-ahead position. The patient shows gaze-evoked and downbeat nystagmus during lateral gazes and upbeat nystagmus on resuming the straight-ahead position after lateral gaze in either direction. (WMV 40763 kb)

Supplementary video 2

Leftward pulsion during upward saccades. The patient shows leftward pulsion only during upward saccades, giving rise to a curved trajectory, in the presence of normal downward and horizontal saccades. (WMV 16911 kb)

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Hyo-Jung Kim
    • 1
    • 3
  • Ji-Soo Kim
    • 2
    • 3
    Email author
  • Jae-Hwan Choi
    • 4
  • Jin-Hong Shin
    • 4
  • Kwang-Dong Choi
    • 5
  • David S. Zee
    • 6
  1. 1.Biomedical Research InstituteSeoul National University Bundang HospitalSeongnamKorea
  2. 2.Department of NeurologySeoul National University College of MedicineSeoulKorea
  3. 3.Department of NeurologySeoul National University Bundang HospitalSeongnamKorea
  4. 4.Department of NeurologyPusan National University Yangsan Hospital, Pusan National University School of Medicine and Biomedical Research InstituteYangsanKorea
  5. 5.Department of NeurologyPusan National University Hospital, Pusan National University School of Medicine and Biomedical Research InstituteBusanKorea
  6. 6.Department of Neurology, Otolaryngology, Head and Neck Surgery, Neuroscience, and OphthalmologyThe Johns Hopkins University School of MedicineBaltimoreUSA

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