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Understanding of VOR for the Beginner
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Byoung Youn Ko, Kyu Sung Kim, Hee Kwun Park
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Res Vestib Sci. 2012;11:73-79.
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 Abstract
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- Vestibulo-ocular reflex is a reflex eye movement that stabilizes images on the retina during head movement by producing an eye movement in the direction opposite to head movement, thus preserving the image on the center of the visual field. The peripheral vestibular receptors which detect head movement transduce the physical stimulus into electrical signals and send the signals to the vestibular nuclei in the beainstem via the vestibular nerve. From these nuclei, fibers project to the ocular motor nuclei which contain motoneurons that drive extraocular muscle activity. Characteristics of anatomy and physiology of the vestibulo-ocular system, stimulation of the vestibular system, measurement and analysis of eye movement, and clinical significance of the vestibule-ocular reflex were described as followings.
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Age and Gender Specific Reference Value of Ocular Torsion by Using Funduscope in Korean
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Byoung Youn Ko, Jeong Seok Choi, Kyu Sung Kim, Hoseok Choi
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Res Vestib Sci. 2011;10(1):30-33.
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Abstract
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- Background and Objectives: Ocular torsion may be a result of vestibulopathy. The funduscopy is the most reliable method of measuring an ocular torsion. However, the reference value of ocular torsion in Korean is available at only limited ages. Therefore, we analyzed the angle of ocular torsion more age-specific than previous study.
Materials and Methods: We used the fundus photograph of health check-up visitor. And age and sex specific average angle of ocular torsion was measured.
Results: The right and left average angle of ocular torsion were 7.7±3.6°, 5.3±3.0°, respectively. In addition, there was no significant difference in age or sex specific angle of ocular torsion.
Conclusion: This result might give an aid to evaluating the function of otolithic organ by measurement of ocular torsion.
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KBS
