Research in Vestibular Science

Myung-Whan Suh

6 Articles

The XXXI Bárány Society Meeting: An Attendance Report: Dong-Han Lee, Myung-Whan Suh; Res Vestib Sci. 2022;21(2):63-65. Published online June 15, 2022; DOI: https://doi.org/10.21790/rvs.2022.21.2.63

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Clinical Application and Updates on Vestibular Evoked Myogenic Potential: Proposal for Future Development in Vestibulopathy: Myung-Whan Suh, Jinil Kim; Res Vestib Sci. 2018;17(3):71-78. Published online September 18, 2018; DOI: https://doi.org/10.21790/rvs.2018.17.3.71

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Both cervical vestibular evoked myogenic potential (cVEMP) and ocular VEMP (oVEMP) are irreplaceable tools in the current vestibular science, but they have many drawbacks. For example, the test-retest reliability of the asymmetry ratio is inadequate for both tests. The American Academy of Neurology noted that there is insufficient evidence to determine whether cVEMP and oVEMP can accurately identify vestibular function specifically related to the saccule/utricle. One of the most important factors underlying the variability of cVEMP seems to be the control of, and compensation for, baseline muscle contraction power. Reasons for variability in oVEMP include a poor signal to noise ratio, the angle of superior gaze, effective and controlled presentation of stimuli, intracranial pressure, and electrode location. Many of these shortcomings could be improved by further development of recording methods and devices. This article examines the reasons for the insufficient reliability of VEMP and proposes avenues for improvement of VEMP recording systems.

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Difference of Cervical Vestibular Evoked Myogenic Potentials between Bone-Conduction and Air-Conduction in Patients with Nonspecific Dizziness
Yong-Hwi An, Jung Ho Choi, Seung Yeon Jeon, Hyun Joon Shim
Research in Vestibular Science.2022; 21(4): 93. CrossRef
A Case of Patient with Acute Peripheral Vestibulopathy Involving Isolated Posterior Semicircular Canal
Sang Kwon Im, Mee Hyun Song, Ja Won Gu, Dae Bo Shim
Research in Vestibular Science.2019; 18(4): 128. CrossRef

Clinical Application and Updates on Vestibular Evoked Myogenic Potential: Proposal for Future Development in Vestibulopathy: Myung-Whan Suh, Jinil Kim; Received August 12, 2018 Accepted August 28, 2018 Published online August 28, 2018; [Accepted]

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Abstract: Both cervical vestibular evoked myogenic potential (cVEMP) and ocular VEMP (oVEMP) are irreplaceable tools in the current vestibular science, but they have many drawbacks. For example, the test–retest reliability of the asymmetry ratio is inadequate for both tests. The American Academy of Neurology noted that there is insufficient evidence to determine whether cVEMP and oVEMP can accurately identify vestibular function specifically related to the saccule/utricle. One of the most important factors underlying the variability of cVEMP seems to be the control of, and compensation for, baseline muscle contraction power. Reasons for variability in oVEMP include a poor signal to noise ratio, the angle of superior gaze, effective and controlled presentation of stimuli, intracranial pressure, and electrode location. Many of these shortcomings could be improved by further development of recording methods and devices. This article examines the reasons for the insufficient reliability of VEMP and proposes avenues for improvement of VEMP recording systems.

Central Apogeotropic Direction Changing Positional Nystagmus due to Fourth Ventricle Mass Mimicking Horizontal Canal Cupulolithiasis Benign Paroxysmal Positional Vertigo: Hyoung Won Jeon, Yae-Ji Shim, Moo-Kyun Park, Myung-Whan Suh; Res Vestib Sci. 2016;15(3):84-88. Published online September 15, 2016; DOI: https://doi.org/10.21790/rvs.2016.15.3.84

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In some dizzy patients the apogeotropic direction changing positional nystagmus (DCPN) can be caused by a central disorder such as a mass lesion near the fourth ventricle or infaction. We have recently encountered a patient who showed a central DCPN mimicing a horizontal canal cupulolithiasis benign paroxysmal positional vertigo (BPPV). A 4.1 cm sized tumor was filling the fourth ventricle before the operation. When the head was turned to the left side vigorous right beting nystagmus was found. When the head was turned to the right side vigorous left beting nystagmus was found. But unlinke the typical horizontal canal BPPV, bowing and lying down position did not elicit any nystagmus. In order to see if the central DCPN was a transient finding or a persistent finding, we checked the nystagmus 3 weeks after the first testing. The same pattern of nystagmus was found again. The video head impulse test gain of all six canals were within the normal limit. In this article we discuss the points how to suspect a central DCPN in such cases.

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The Effect, Compliance and Satisfaction of Customized Vestibular Rehabilitation: A Single Center Experience
Hyung Lee, Hyun Ah Kim
Research in Vestibular Science.2019; 18(1): 14. CrossRef
Factors Associated with Patient Satisfaction in Customized Vestibular Exercise: A Pilot Study
Hye Soo Ryu, Min Young Lee, Jae Yun Jung, Ji Eun Choi
Research in Vestibular Science.2019; 18(3): 71. CrossRef

Associated Symptoms in Dizziness: Hearing Loss and Tinnitus: Mi Na Park, Myung-Whan Suh; Res Vestib Sci. 2013;12:S16-S23. Published online June 1, 2013

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Abstract PDF: Dizziness is one of the most common complaint leading patients to visit their primary care physicians in older people. Despite its frequency, symptoms of dizziness can be difficult for the physician to categorize. Also many dizzy patients have hearing loss. The evaluation of patients with dizziness depends on not only the history of dizziness, physical findings but also basic laboratory tests such as audiometry, electrocochleogram, Cochlear hydrops analysis masking procedure, auditory brainstem response. Based on these considerations, this article outlines the interpretation of basic audiologic tests which is fundamental in evaluating dizzy patients.

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