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Ocular Vestibular Evoked Myogenic Potential in Vestibular Neuritis Patients: Comparative Study with Cervical Vestibular Evoked Myogenic Potential and Subjective Visual Vertical
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Su Il Kim, Young Min Ha, Sang Hoon Kim, Ji Hyun Chung, Moon Suh Park, Jae Yong Byun
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Res Vestib Sci. 2014;13(4):102-107.
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 Abstract
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- Background
and Objectives: Subjective visual vertical (SVV) reflects utricle and
superior vestibular neural functions, and cervical vestibular evoked myogenic
potentials (cVEMP) reflect saccule and inferior vestibular neural functions. But,
origin and characteristics of ocular VEMP (oVEMP) remain controversial, especially
in case of evoked by air conducted sound (ACS). Thus, the aim of this study
was to identify the origin and characteristics of oVEMP by comparing with
various otolith function tests. Materials and Methods: Forty vestibular neuritis
patients were enrolled from September 2012 to January 2013 in this study. We
examined cVEMP, oVEMP using 500 Hz air-counducted sounds. And, we
measured static and dynamic SVV. Results: Abnormal cVEMP responses were
observed in 6 (15%) patients, and abnormal oVEMP responses were observed
in 28 (70%) patients. Abnormal static and dynamic SVV were observed in 18
(45%), 35 (87.5%) patients, respectively. There was strong correlation between
oVEMP and dynamic SVV (p=0.009). Conclusion: ACS oVEMP responses
showed different tendency from cVEMP responses in vestibular neuritis patients,
but similar tendency with results of dynamic SVV. The results suggest that origin
of oVEMP is different from that of cVEMP and maybe utricle and superior
vestibular neuron.
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A Human Immunodeficiency Virus-Positive Patient with Dizziness and Peripheral Facial Palsy
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Eun Woong Ryu, Jae Yong Byun, Hoon Jung, Moon Suh Park
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Res Vestib Sci. 2010;9(1):38-42.
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Abstract
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- Various neurological complications occur in association with human immunodifiency virus (HIV) infection. These complications occur at all stages of infection and any level of central and peripheral nervous system. Neurological complications, such as aseptic meningitis, encephalopathy, neuropathy, myelopathy, and brachial neuritis, develop in association with primary HIV infection. We here in report a case of peripheral facial palsy with suspicious peripheral vertigo manifested as initial symptoms of primary HIV infection.
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Subjective Visual Vertical during Eccentric Rotation in Acute Vestibular Neuritis Patients
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Kee Hwan Kwon, Moon Suh Park, Jae Yong Byun
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J Korean Bal Soc. 2008;7(2):182-187.
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Abstract
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- Background and objective: By assessing unilateral utricular function at the acute unilateral vestinuloneuritis (Acute UVN), we sought to determine the ability of the subjective visual vertical (SVV) during eccentric rotation (dynamic SVV) in localizing the site of the lesion in unilateral vestibular neuritis (UVN).
Methods: The static SVV and dynamic SVV of fifteen patients diagnosed with acute UVN were enrolled within 10 days of onset (average 7 days). First, the static SVV was measured in a dark booth without rotation. The dynamic SVV was measured during rotation with an eccentric displacement of the head to 3.5 cm from the vertical rotation axis during a constant velocity of 300°/s.
Results: In the acute stage of UVN, the static SVV showed an increase in deviation to the side of the lesion compared to those of normal subjects. Also, we found 73% of abnormal findings in Acute UVN patients by assessing static conventional SVV. The dynamic SVV had a statistically significant increase in deviation to the side of the lesion compared to those of normal subjects and 93% patients showed beyond normal range.
Conclusions: The dynamic SVV would be an effective method in the diagnosis and localization of acute unilateral vestibularneuritis,
Key words: Acute vestibular neuritis, Subjective visual vertical, Eccentric rotation
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