| Bowtie, Upbeat and Hemi-seesaw Nystagmusin Medial Medullary Infarction |
| Kwang-Dong Choi, Dae Soo Jung, Kyung-Pil Park, Jae-Wook Jo, and Ji Soo Kim |
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| Copyright © 2004 The Korean Society of Clinical Neurophysiology |
| This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium,
provided the original work is properly cited. |
| ABSTRACT |
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A 20-year-old man with bilateral medial medullary infarction showed transition of bowtie and upbeat nystagmus intohemi-seesaw nystagmus. Follow-up MRI revealed near complete resolution of the right medullary lesion. This transitionof nystagmus suggests that the upbeat nystagmus was generated by bilateral lesions in the ascending pathways fromboth anterior semicircular canals (SCC), and that the hemi-seesaw nystagmus was caused by damage to the pathwayfrom the left anterior SCC. |
| Key words:
Bowtie Nystagmus, Hemi-seesaw Nystagmus, Medial Medullary Syndrome |
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