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A new paradigm of electro-oculogram for the detection of slow saccade Kumiko Kamigaki 1 , Tetsuto Yamada 2 , Kazuo Mukuno 1 , Yumiko Mitsuhashi 2 , Asako Sugimoto 2 , Ayako Matsuno 2 1Dept of Orthoptics and Visual Science, Kitasato Univ 2Dept of Ophthalmol, Kitasato Univ pp.1321-1326
Published Date 1999/6/15
DOI https://doi.org/10.11477/mf.1410906444

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  • Abstract
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Purpose : The sensitivity of electro-oculogram (EOG) varies with the location of the electrode and the eye position during monocular induction due to influence of the fellow eye, or cross talk. We developed a new paradigm to detect slightly slowing saccade in mild disorders. Cases and Methods : We examined 5 patients with divergence palsy, one patient with internuclear ophthalmoplegia (INO) and 5 healthy persons as control. Eye movements were recorded using standard monocular-induction EOG. The data were fed into a personal computer to measure the saccade amplitude and peak velocity. We calculated the peak velocities of saccades which went from the fixation target to eccentric target and vice versa. Each eye was measured for over 200 sets of to-and-fro saccades. The relationship between the amplitude and peak velocity was evaluated using an exponential curve-fitting method. Results : There were mild difference between centrifugal and centripetal saccades in control eyes. The patient with INO showed slowing in ipsilateral abducting and contralateral adducting saccades. Conclusion : This method is potentially useful in detecting modest oculomotor disorders, particularly in mild or subclinical abnormalities by evaluating the velocity of saccades.


Copyright © 1999, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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