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HOME > J Korean Bal Soc > Volume 4(1); 2005 > Article
Case Report Jerky Seesaw Nystagmus in Isolated Internuclear Ophthalmoplegia
Kyungmi Oh, Jae Hong Chang, Kun Woo Park, Dae Hie Lee, Kwang Dong Choi, Ji Soo Kim

DOI: https://doi.org/
1Department of Neurology, Korea University School of Medicine, Seoul, Korea.
2Department of Neurology, Seoul National University College of Medicine, Seongnam, Korea. jisookim@snu.ac.kr
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The authors report jerky seesaw nystagmus, extorsional downbeating in the right eye and intorsional upbeating in the left eye, in a patient with right internuclear ophthalmoplegia (INO). This pattern of nystagmus may occur by disrupting pathways from contralateral posterior and anterior semicircular canals by a lesion in the medial longitudinal fasciculus. Depending on damage to the pathways from contralateral vertical canals, various patterns of dissociated torsional-vertical nystagmus may accompany INO.


Res Vestib Sci : Research in Vestibular Science