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  • Title: Rebound upbeat nystagmus after lateral gaze in episodic ataxia type 2.
    Author: Kim HJ, Kim JS, Choi JH, Shin JH, Choi KD, Zee DS.
    Journal: Cerebellum; 2014 Jun; 13(3):411-3. PubMed ID: 24420976.
    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.
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