Akin F W, Murnane O D
Audiology and Speech Pathology Service, James H. Quillen VA Medical Center, Mountain Home, Tennessee 37684, USA.
J Am Acad Audiol. 2001 Oct;12(9):445-52; quiz 491.
Vestibular evoked myogenic potentials (VEMPs) are short-latency electromyograms evoked by high-level acoustic stimuli recorded from surface electrodes over the tonically contracted sternocleidomastoid (SCM) muscle. These responses are presumed to originate in the saccule. The purpose of this preliminary report is to provide an overview of our initial experience with the VEMP by describing the responses obtained in five subjects. Click-evoked VEMPs were present at short latencies in two normal-hearing subjects, one patient with profound congenital sensorineural hearing loss, and one patient with a severe sensorineural hearing loss due to Meniere's disease. Additionally, VEMPs were absent in a patient with profound sensorineural hearing loss following removal of a cerebellopontine angle tumor. The amplitude of the VEMP was influenced by the amount of background activity of the SCM muscle, stimulus level, and stimulus frequency. Tone-burst evoked responses showed an inverse relationship between stimulus frequency and response latency. VEMPs may prove to be a reliable technique in the clinical assessment of vestibular function.
前庭诱发肌源性电位（VEMPs）是由高强度听觉刺激诱发的短潜伏期肌电图，通过置于张力性收缩的胸锁乳突肌（SCM）上的表面电极记录。这些反应被认为起源于球囊。本初步报告的目的是通过描述在五名受试者中获得的反应，概述我们对VEMP的初步经验。短潜伏期的点击诱发VEMPs在两名听力正常的受试者、一名先天性重度感音神经性听力损失患者和一名因梅尼埃病导致重度感音神经性听力损失的患者中出现。此外，一名桥小脑角肿瘤切除术后重度感音神经性听力损失患者未出现VEMPs。VEMP的振幅受SCM肌肉背景活动量、刺激强度和刺激频率的影响。短纯音诱发反应显示刺激频率与反应潜伏期呈反比关系。VEMPs可能被证明是一种可靠的前庭功能临床评估技术。
