Beschreibung:
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<jats:title>Objective</jats:title>
<jats:p>To compare ocular vestibular evoked myogenic potentials (oVEMPs) obtained with three different electrode montages (infra-orbital vs belly-tendon vs chin) in a group of healthy subjects. To assess the electrical activity recorded at the level of the reference electrode in the belly-tendon and chin montages.</jats:p>
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<jats:title>Study Design</jats:title>
<jats:p>Prospective study.</jats:p>
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<jats:title>Setting</jats:title>
<jats:p>Tertiary referral center.</jats:p>
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<jats:title>Patients</jats:title>
<jats:p>Twenty-five healthy adult volunteers.</jats:p>
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<jats:title>Intervention(s)</jats:title>
<jats:p>Each ear was tested separately via air-conducted sound (500 Hz Narrow Band CE-Chirps at 100 dB nHL) for recording contralateral myogenic responses. Recording conditions were randomized.</jats:p>
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<jats:title>Main Outcome Measure(s)</jats:title>
<jats:p>n1-p1 amplitudes values, interaural amplitude asymmetry ratios (ARs) and response rates.</jats:p>
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<jats:title>Results</jats:title>
<jats:p>The belly-tendon electrode montage (BTEM) produced larger amplitudes than the chin (<jats:italic toggle="yes">p</jats:italic> = 0.008) and the IOEM (infra-orbital electrode montage; <jats:italic toggle="yes">p</jats:italic> < 0.001). The chin montage displayed larger amplitudes than the IOEM (<jats:italic toggle="yes">p</jats:italic> < 0.001). The interaural amplitude asymmetry ratios (ARs) were not affected by the different electrode montages (<jats:italic toggle="yes">p</jats:italic> = 0.549). In 100% of cases, oVEMPs were detected bilaterally with the BTEM which is higher than with the chin and the IOEM (<jats:italic toggle="yes">p</jats:italic> < 0.001; <jats:italic toggle="yes">p</jats:italic> = 0.020, respectively). We did not record any VEMP when placing the active electrode on the contralateral internal canthus or the chin and the reference electrode on the dorsum of the hand.</jats:p>
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<jats:title>Conclusions</jats:title>
<jats:p>The BTEM increased the amplitudes recorded and response rate in healthy subjects. No positive or negative reference contamination was observed with the belly-tendon or chin montages.</jats:p>
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