Side-difference of vestibular evoked myogenic potentials in healthy subjects

Young, Yi‐Ho; Kuo, Shih-Wei

doi:10.1016/j.heares.2004.06.011

Cited by 21 publications

(15 citation statements)

References 14 publications

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“…cVEMP amplitudes were proportional to the stimulation level. This has also been shown in several previous studies [Ozdek et al, 2009;Wang and Young, 2003;Welgampola and Colebatch, 2001;Young, 2006;Young and Kuo, 2004]. We could not measure any side differences.…”

Section: Discussionsupporting

confidence: 68%

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Neurofeedback-Controlled Comparison of the Head Elevation versus Head Rotation and Head-Hand Methods in Eliciting Cervical Vestibular Evoked Myogenic Potentials

Rahne

Weiser

Plontke³

2014

Audiol Neurotol

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A constant tension of the sternocleidomastoid muscles is a prerequisite to a reliable recording of cervical vestibular evoked myogenic potentials (cVEMP). Therefore, the head elevation method, the head rotation method, and the head-hand method are used in clinical practice. So far, no method has been shown to achieve the best stability and validity of the cVEMP responses. We performed a prospective study to compare the cVEMP responses in a within-subject design. With 40 healthy subjects, cVEMP amplitudes, latencies, asymmetry ratios and thresholds were measured. The muscle tension was kept constant by using acoustic feedback. The individual subjective comfort and preference of a method were evaluated by a questionnaire. The cVEMP threshold and asymmetry ratios were lowest with the head rotation method. This method was also rated as the most comfortable and thus preferred one. The cVEMP latencies were not different between the methods. Our results show that the head rotation method appears to be superior to the compared head elevation and head-hand methods.

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Section: Discussionsupporting

confidence: 68%

“…We could not measure any side differences. The side differences as reported by Young and Kuo [2004] were due to different EMG amplitudes. As cVEMP amplitude depends on the EMG level [Young, 2006], a constant EMG level is strongly advised to avoid misinterpretations of cVEMP amplitude side differences.…”

Section: Discussionmentioning

confidence: 60%

Neurofeedback-Controlled Comparison of the Head Elevation versus Head Rotation and Head-Hand Methods in Eliciting Cervical Vestibular Evoked Myogenic Potentials

Rahne

Weiser

Plontke³

2014

Audiol Neurotol

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“…Under similar acoustic stimulation, the effectiveness of a neuromuscular reflex, either excitatory or inhibitory, can therefore be correlated with the voluntary task undertaken by the muscle [12]. Because the amplitude of the VEMP varies substantially between subjects and in one subject between trials, either interaural amplitude difference (IAD) ratio or relative amplitude was used to adjust the side difference of amplitudes [13]. The IAD ratio is defined as interaural peak-to-peak amplitude difference over the sum of amplitudes of both ears [14].…”

Section: Discussionmentioning

confidence: 99%

“…The EMG activities were monitored during recording to maintain muscle activities at a relatively constant level (50-200 lV). Hence, applying increased effort in the head elevation method may result in a neuromuscular reflex with increased effectiveness [13], leading to large amplitude of VEMPs. However, the lower response rate with smaller amplitude prevents the use of the head rotation method as an initial screening test for VEMPs.…”

Section: Head Elevation Vs Head Rotation Methodsmentioning

confidence: 99%

Vestibular evoked myogenic potentials: optimal stimulation and clinical application

Young

2006

J Biomed Sci

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SummaryBy easily stimulating the ear with loud sound and recording on tonically contracted neck muscles, vestibular evoked myogenic potential (VEMP) test can reflect inner ear function other than the cochlea and semicircular canal. This expands the test battery for clinicians to explore saccular disease, adding a potential usefulness to the sacculo-collic reflex. The ideal stimulation mode for VEMPs is as follows: 95 dB tone bursts, frequency 500 Hz, stimulation repetition rate 5 Hz, rise/fall time 1 ms, plateau 2 ms, binaural stimulation with bilateral recordings. Animal model using guinea pigs has been established, which sets the stage for useful future studies investigating VEMPs in guinea pigs that would appear to resemble human VEMP responses. Clinically, VEMP test has been widely used in central and peripheral vestibular disorders.

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“…Thereby, the latency of peak p13 and the p13-n23 amplitude were measured. Relative amplitude indicated that the p13-n23 amplitude after alcohol dosing was divided by that before dosing [Young and Kuo, 2004].…”

Section: Vemp Testmentioning

confidence: 99%

Impact of Alcohol on Vestibular Function in Relation to the Legal Limit of 0.25 mg/l Breath Alcohol Concentration

Chiang¹,

Young²

2007

Audiol Neurotol

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The aim of this study was to investigate the effect of alcohol on sacculocollic and vestibulo-ocular reflex systems, when the breath alcohol concentration (BrAC) is close to the legal limit of 0.25 mg/l. Twenty healthy male volunteers underwent vestibular evoked myogenic potential and caloric coupled with visual suppression tests. These tests were conducted prior to imbibing alcohol at a dosage of 0.5 g/kg to achieve a peak BrAC of around 0.25 mg/l. Once the peak BrAC was reached, these tests were performed again. Predosing and postdosing analytical results were compared, as were those with BrAC levels ≧ 0.25 mg/l and <0.25 mg/l. After ingesting alcohol, 36 ears (90%) showed vestibular evoked myogenic potential responses, with a significantly increased latency of peak p13. The mean slow-phase velocity of caloric nystagmus in 40 ears after dosing was significantly reduced, and that with BrAC ≧0.25 mg/l was significantly less than that with BrAC <0.25 mg/l. Likewise, the visual suppression index decreased considerably after alcohol ingestion. In conclusion, from the perspective of vestibular function, the 0.25-mg/l BrAC limit gains clinical significance, because the vestibulo-ocular reflex performance deteriorates further, when the BrAC exceeds 0.25 mg/l. However, impaired performance of sacculocollic reflex and vestibulocerebellar interaction has occurred, when the BrAC was <0.25 mg/l, suggesting that a lower legal threshold is appropriate.

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Side-difference of vestibular evoked myogenic potentials in healthy subjects

Cited by 21 publications

References 14 publications

Neurofeedback-Controlled Comparison of the Head Elevation versus Head Rotation and Head-Hand Methods in Eliciting Cervical Vestibular Evoked Myogenic Potentials

Neurofeedback-Controlled Comparison of the Head Elevation versus Head Rotation and Head-Hand Methods in Eliciting Cervical Vestibular Evoked Myogenic Potentials

Vestibular evoked myogenic potentials: optimal stimulation and clinical application

Impact of Alcohol on Vestibular Function in Relation to the Legal Limit of 0.25 mg/l Breath Alcohol Concentration

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