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J Korean Bal Soc > Volume 3(2); 2004 > Article
Journal of the Korean Balance Society 2004;3(2): 413-416.
핵간안근마비에서 관찰되는 시소안진의 발병기전
, , , , , , , 김지수1, 최광동1, 구자원2, 오경미3, 장재홍3, 박건우3, 이대희3, 한규철4
서울대학교 의과대학 신경과학교실1, 이비인후과학교실2, 고려대학교 의과대학 신경과학교실3, 가천의과대학교 이비인후과학교실4
Possible Mechanism of Seesaw Nystagmus in Internuclear Ophthalmoplegia
Ji Soo Kim, Kwang Dong Choi, Ja Won Koo, Kyungmi Oh, Jae Hong Chang, Kun Woo Park, Dae Hie Lee, Gyu Cheol Han
1Department of Neurology, Seoul National University College of Medicine, Korea. jisookim@snu.ac.kr
2Department of Otolaryngology-Head & Neck Surgery, Seoul National University College of Medicine, Korea.
3Department of Neurology, Korea University School of Medicine, Korea.
4Department of Otolaryngology-Head & Neck Surgery, Gachon Medical School, Korea.
The authors report jerky seesaw nystagmus, extorsional downbeating in the ipsilesional eye and intorsional upbeating in the contralesional eye, in a patient with internuclear ophthalmoplegia (INO) from focal pontine lesion. 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 the pathways involved, various patterns of dissociated torsional-vertical nystagmus may accompany INO.
Keywords: Internuclear ophthalmoplegia; Seesaw nystagmus
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