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Acknowledgments
This work was supported by a Grant of the Korean Heath Technology R&D Project, Ministry of Health and Welfare, Republic of Korea (A070001).
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We have no disclosure of any competing interest.
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The authors declare that they acted in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki.
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Supplementary material 1 Leftward head rotation induces convergent eye motion with horizontal and vertical saccadic oscillation of small amplitude and high frequency, which is followed by prominent upbeat nystagmus with a small left-beating component. The upbeat nystagmus decreases over the following 20 seconds even though the rotated head posture is maintained. (WMV 9557 kb)
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Park, SH., Kim, SJ., Seo, JD. et al. Upbeat nystagmus during head rotation in rotational vertebral artery occlusion. J Neurol 261, 1213–1215 (2014). https://doi.org/10.1007/s00415-014-7328-5
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DOI: https://doi.org/10.1007/s00415-014-7328-5