摘要
目的:观察我国正常青年人群中前庭诱发肌源性电位(VEMP)出现的阳性率及各项参数指标.方法:选取52例(男31例,女21例)21～22岁正常健康人群,以短声为刺激声,单耳给声,同侧胸锁乳突肌(SCM)记录.结果:47例2耳均可引出VEMP,5例2耳均不能引出.总104耳中,94耳阳性,10耳阴性,阳性率90%.统计阳性耳各参数:p1潜伏期(15.97±3.22)ms、n2潜伏期(24.41±2.46)ms、p1n2间期(8.41±2.06)ms,幅值(33.27±14.37)μV,阈值(93.67±5.20)dB nHL. 统计47例正常人同一个体耳内差异的各参数为p1潜伏期(0.97±1.31)ms,n2潜伏期(1.23±1.30 )ms,p1n2间期(0.95±1.21 )ms,幅值(10.04±11.88)μV,阈值(2.29±2.56 )dB nHL.男女各参数比较差异无统计学意义.结论:绝大部分正常人可引出VEMP.VEMP的引出体现该侧耳球囊→前庭下神经→脑干前庭神经核→前庭脊髓通路→颈肌运动神经元这条反射途径的完整性.VEMP可能成为一种检测前庭终器及其传导通路完整性的方法.
Objective：To observe the positive rate and other variances of the vestibular evoked myogenic potentials （VEMP）in normal young people. Method： Fifty-two normal young people aged from 21-22 years old including 31males and 21 females were investigated. Intense clicks were given to one test ear and EMG was recorded from ipsilateral side. Resnlt：VEMPs were presented in both ears in 47 subiects, absent in either of the two ears in 5 subjects. Variances averaged from all 94 positive ears were as follows（mean± standard deviation） ：latencies for pl （15.97±3.22）ms,latencies for n2 （24.41±2.46）ms, interval time between pl and n2 （8.41±2.06）ms,amplitude （33.27±14.37）μV,threshold （93.67±5.20）dB nHL. Inter-subject variances averaged from 47 normal subjects were as follows：latencies for pl （0.97±1.31）ms ,latencies for n2 （1.23±1.30）ms, interval time between pl and n2 （0.95±1.21）ms,amplitude （10.04±11.88）μV,threshold （2.29±2.56）dB nHL. There were no significant difference between males and females. Conclusion： VEMP can be recorded in most normal subjects. VEMP may travel along the hypothesized response pathway from the vestibular sacculus to the inferior vestibular nerve , vestibular nucleus, and lateral vestibulospinal tract to the SCM muscle. VEMP recording could become an attractive method for testing otolithic receptors and vestibulospinal pathways.
出处
《临床耳鼻咽喉科杂志》
CAS
CSCD
北大核心
2005年第22期1012-1014,共3页
Journal of Clinical Otorhinolaryngology
关键词
前庭诱发肌源性电位
声刺激
胸锁乳突肌
球囊
Vestibular evoked myogenic potentials I Acoustic stimulation
Sternocleidomastoid muscle
Saccule
作者简介
通讯作者：孔维佳（Email：wjkong@whuh．com）
