Possible Mechanism of Seesaw Nystagmus in Internuclear Ophthalmoplegia.
- Author:
Ji Soo KIM
1
;
Kwang Dong CHOI
;
Ja Won KOO
;
Kyungmi OH
;
Jae Hong CHANG
;
Kun Woo PARK
;
Dae Hie LEE
;
Gyu Cheol HAN
Author Information
1. Department of Neurology, Seoul National University College of Medicine, Korea. jisookim@snu.ac.kr
- Publication Type:Case Report
- Keywords:
Internuclear ophthalmoplegia;
Seesaw nystagmus
- MeSH:
Humans;
Ocular Motility Disorders*;
Semicircular Canals
- From:Journal of the Korean Balance Society
2004;3(2):413-416
- CountryRepublic of Korea
- Language:English
-
Abstract:
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.
