Department of Audiology, All India Institute of Speech and Hearing, Mysuru.
Am J Audiol. 2022 Jun 2;31(2):403-410. doi: 10.1044/2022_AJA-22-00016. Epub 2022 May 10.
Masseter vestibular evoked myogenic potentials (VEMPs) are short-latency myogenic responses obtained in response to electric or acoustic stimulation. It is a relatively newer test that helps assess the vestibulo-trigeminal pathway, thereby gaining more interest in brainstem pathologies like Parkinsonism, multiple sclerosis, and idiopathic random eye movement disorders. The purpose of the study was to compare the effect of zygomatic versus mandibular reference montage on the latency and amplitude of masseter VEMP (mVEMP) using a 500-Hz tone burst stimulus.
Twenty healthy participants in the age range of 18-29 years, with no complaints of vestibular signs and symptoms, were recruited for the study. VEMP was recorded for all the participants using 500-Hz tone burst stimuli in zygomatic electrode montage and mandibular electrode montage. mVEMP was recorded in both ipsilateral and contralateral modes.
The Wilcoxon signed-ranks test revealed no significant difference between the zygomatic and mandibular montage for both the latency and amplitude parameters ( > .05).
This study revealed no significant difference in p11 and n21 latencies as well as p11-n21 rectified amplitude between zygomatic and mandibular montage using a 500-Hz tone burst stimulus in young adults. Hence, utilizing a 500-Hz tone burst, mVEMP can be recorded in zygomatic and mandibular electrode montage.
咀嚼肌前庭诱发肌源性电位（VEMP）是一种短潜伏期肌源性反应，可通过电或声刺激获得。它是一种相对较新的测试，有助于评估前庭-三叉神经通路，因此在帕金森病、多发性硬化症和特发性随机眼球运动障碍等脑干病变中引起了更多的兴趣。本研究的目的是比较使用 500Hz 短音刺激时，颧弓与下颌参考电极放置对咀嚼肌 VEMP（mVEMP）潜伏期和振幅的影响。
招募了 20 名年龄在 18-29 岁之间、无前庭症状和体征的健康参与者进行研究。使用 500Hz 短音刺激，在颧弓电极放置和下颌电极放置两种方式下，为所有参与者记录 VEMP。记录双侧 mVEMP 时采用同侧和对侧两种模式。
Wilcoxon 符号秩检验显示，在潜伏期和振幅参数方面，颧弓和下颌两种电极放置方式之间无显著差异（>.05）。
本研究显示，在年轻成年人中，使用 500Hz 短音刺激时，颧弓和下颌两种电极放置方式在 p11 和 n21 潜伏期以及 p11-n21 校正振幅方面无显著差异。因此，使用 500Hz 短音刺激时，mVEMP 可以在颧弓和下颌电极放置方式下记录。
