Voluntary Nystagmus. |
Ji Soo Kim, So Young Moon, Kwang Ki Kim, Jeong Min Hwang |
1Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea. 2Department of Ophthalmology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea. hjm@snu.ac.kr |
수의눈떨림 |
김지수 ( Ji Soo Kim ) , 문소영 ( So Young Moon ) , 김광기 ( Kwang Ki Kim ) , 황정민 ( Jeong Min Hwang ) |
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Abstract |
PURPOSE We evaluated the clinical manifestations of voluntary nystagmus in three patients and verified the efficacy of video-oculography as a diagnostic tool to differentiate voluntary nystagmus from congenital or latent nystagmus. METHODS: Meticulous history taking and neuro-ophthalmologic examination were performed for three patients with voluntary nystagmus. Video-oculography was also performed in one patient. RESULTS: All of the three patients were young men in military service. Neuro-ophthalmologic examination was normal in all three patients, except for shaking of the eyes. Video-oculography in one patient showed 5~6 Hz pendular oscillation with an amplitude of 7~15 degrees and a peak velocity of 345.4 deg/sec, verifying that the oscillatory eye movement was composed of saccades and was not a nystagmus. CONCLUSIONS: In differentiating between voluntary and congenital nystagmus, video-oculography as well as history taking and neuro-ophthalmologic examination were very helpful. |
Key Words:
Neuro-ophthalmologic examination;Video-oculography;Voluntary nystagmus |
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