Abstract
Background: Characteristics of vestibular evoked myogenic potentials (VEMPs) depend on stimulus conditions.Objective: To determine the optimal stimulus conditions for cervical and ocular VEMPs.Methods: Participants were 23 healthy subjects. We compared air-conducted cervical and ocular VEMPs elicited by various tone-burst conditions (frequencies 500–1,000 Hz, rise/fall times 1–2 ms, and plateau times 0–6 ms) with an intensity of 105 dB normal hearing level. Effects of simultaneous contralateral masking noise on VEMPs were also evaluated.Results: The largest cervical VEMP amplitudes were elicited by 500–750 Hz and 2–6 ms plateau time-tone-bursts, and the largest ocular VEMP amplitudes by 750 Hz and 2–4 ms plateau time-tone-bursts. Repeatability of the latency was better at 1 ms than at 2 ms rise/fall time in both VEMPs. In both VEMPs, masking noise reduced amplitude, and in ocular VEMP, amplitudes were significantly larger at the left ear stimulation than the right.Conclusion: Optimal tone-burst stimulation for both VEMPs seemed to be 500–750 Hz frequency and 1/2/1 ms rise/plateau/fall time without contralateral masking noise. Ocular VEMP amplitudes from left ear stimulation were originally larger than those from right ear stimulation.
Published Version
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