Reliability of Vestibular Evoked Myogenic Potentials in Healthy Subjects

Isaradisaikul, Suwicha; Strong, Darcy; Moushey, Jamie M.; Gabbard, Sandra Abbott; Ackley, Steven R.; Jenkins, Herman A.

doi:10.1097/mao.0b013e31816c7c25

Cited by 73 publications

(71 citation statements)

References 8 publications

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“…The first method is the monitoring of the pre-stimulus contraction level of the SCM, so the system runs a correction algorithm capable of calculating corrected amplitudes or it does not accept the myogenic responses if level of contraction is out of a pre-defined range [14,19]; the second is the use of a visual feedback system as a blood pressure manometer [16,19] or a visual display to maintain a steady contraction during the test. In our experiments, we have used both methods to monitor the level of tonic contraction in the SCM between different trials.…”

Section: Reliability Of Vempsmentioning

confidence: 99%

“…Although the reliability of STB-induced VEMPs has been investigated [13][14][15][16][17], a comparative study of individual responses to STB-and clicks-induced VEMPs in a group of healthy subjects has not been carried out and there is no rationale for using either click or STB. To solve this issue, we performed a reliability study for STB-and click-induced VEMPs in healthy subjects in different sessions.…”

Section: Introductionmentioning

confidence: 99%

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Short tone bursts are better than clicks for cervical vestibular-evoked myogenic potentials in clinical practice

Viciana

Lopez-Escamez

2012

Eur Arch Otorhinolaryngol

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Our aim is to compare short tone burst (STB)--and clicks--stimuli to evoke vestibular-evoked myogenic potentials (VEMPs) in healthy controls. A cross-sectional study in which VEMPs were measured in two sets of 185 and 55 normal volunteers by an air-conducted 500 Hz STBs and clicks, respectively. The test-retest reliability between different sessions was assessed in two subsets of 35 individuals. Moreover, 53 individuals were examined with both stimuli within the same session. Intraclass correlation coefficients (ICC) were used to assess reliability for P1 and N1 latencies, corrected amplitude and asymmetry ratio (AR). The results included that STBs produced a reliable response between different sessions (N = 35; [ICC] = 0.61-0.94, all p < 0.0001). Although clicks produced a reliable response for P1 and N1 latencies and corrected amplitudes (ICC = 0.62-0.74, all p < 0.0001), the amplitude ratio showed a lower reliability [ICC = 0.32 (-0.10 to 0.59)]. The amplitude of VEMP was consistently larger with 500 Hz STBs than clicks for a given sound pressure level. Within the same session, STBs evoked a response in 52/53 subjects (98%) whereas clicks evoked VEMPs only in 44/53 individuals (83%). Conclusions revealed that a 500 Hz STBs elicited consistently larger amplitudes, better reliability across recording sessions and fewer missing responses compared with click-induced VEMPs.

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Section: Reliability Of Vempsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Short tone bursts are better than clicks for cervical vestibular-evoked myogenic potentials in clinical practice

Viciana

Lopez-Escamez

2012

Eur Arch Otorhinolaryngol

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“…In a recent report, evaluation of VEMP responses with or without the use of EMG monitoring in two separate sessions was studied. It was found that symmetric head rotation with and without EMG monitoring produced reliably reproducible results [50]. However, the sample is small, only 20 participants, and further studies are needed to verify this statement.…”

Section: Monitoring Of Scm Contractionmentioning

confidence: 88%

Vestibular-evoked myogenic potentials eliciting: an overview

Eleftheriadou

Koudounarakis

2010

Eur Arch Otorhinolaryngol

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Recently, the favoured approach for unilateral testing of saccular function is the recently developed method of vestibular-evoked myogenic potentials (VEMPs). VEMP testing is a reliable technique, since it selectively stimulates and investigates each lateral canal in isolation from the other, providing information for the assessment of otolith function and inferior vestibular nerve integrity. The aim of this study was to provide a current review of the different methods used to record VEMPs. We noticed discrepancies in relation to the ways used to record the VEMPs in relation to the following factors: types of stimuli used (clicks or tone bursts) and body muscles tested, patient position at the time of recording, response, type of phone used and way of stimulus presentation (mono or binaural, ipsi or contralateral) and others. As a conclusion, despite the numerous studies in the field, there is no consensus in the literature as to the best recording method for VEMPs. However, the new ocular VEMPs in response to bone conducted vibration seem to be of clinical importance for the evaluation of utricular function. Further research is needed to support its clinical usefulness.

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“…Although the EMG was not monitored, it was made sure that the cVEMP waveforms were visually monitored for any insufficient strength of neck contraction. Interestingly, Isaradisaikul et al (2008) reported that there was no significant difference between the cVEMP waveforms with and without EMG monitoring.…”

Section: Comparisons Between Stimulus Durationmentioning

confidence: 99%