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Japanese

DIAGNOSTIC EVALUATION OF OPTOKINETIC AFTER NYSTAGMUS (OKAN) Eiji Sakata 1 pp.589-596
Published Date 1970/8/20
DOI https://doi.org/10.11477/mf.1492207498
  • Abstract
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 Optokinetic after nystagmus (OKAN) was studied on 208 cases affected vertigo and loss of balance and, also, on 12 cases of person in normal health.

 OKAN in normal persons may last from 17 to 28 sec. at a time with eye movements from 14 to 32 times. However, there are a great deal of individual difference which may be influenced by such factors as, light, sounds and pain.

 In cases of brain stem tumors the manifestation of optokinetic nystagmus (OKN) and OK AN may highly delayed. Yet in cases of circulatory disturbances involving the brain base the spinal cord, OKN may show an early manifestation but, OKAN may not be seen at all.

 In cases of peripheral vestibular disturbances in comparison to that of the cerebellar one, OK AN on either side may show a significant wide difference.


Copyright © 1970, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 印刷版ISSN 0386-9679 医学書院

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