Title |
Rebound Upbeat Nystagmus After Lateral Gaze in Episodic Ataxia Type 2
|
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Published in |
The Cerebellum, January 2014
|
DOI | 10.1007/s12311-014-0547-6 |
Pubmed ID | |
Authors |
Hyo-Jung Kim, Ji-Soo Kim, Jae-Hwan Choi, Jin-Hong Shin, Kwang-Dong Choi, David S. Zee |
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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