正常受试者的前庭诱发肌源性电位（VEMP）与电刺激。
Vestibular evoked myogenic potential (VEMP) with galvanic stimulation in normal subjects.
机构信息
Universidade Federal de Minas Gerais, Faculdade de Medicina, Belo HorizonteMG, Brasil, Faculdade de Medicina da Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brasil.
Universidade Católica de Pelotas, PelotasRS, Brasil, Universidade Católica de Pelotas, Pelotas, RS, Brasil.
出版信息
Braz J Otorhinolaryngol. 2014 Jan-Feb;80(1):48-53. doi: 10.5935/1808-8694.20140011.
INTRODUCTION
The vestibular evoked myogenic potential (VEMP) generated by galvanic vestibular stimulation (GVS) is related to the vestibulo-spinal pathway. The response recorded from soleus muscle is biphasic with onset of short latency (SL) component around 60 ms and medium latency (ML) component around 100 ms. The first component reflects otolith function (sacule and utricle) and the last deals with semicircular canals.
AIM
To describe VEMP generated by GVS.
METHODS
In this cross-sectional clinical study, VEMP was generated by 2 mA/400 ms binaural GVS, frequency of 5-6 ms that was recorded from soleus muscles of 13 healthy adults, mean age 56 years. The subjects remained standing, head turned contralateral to the GVS applied to the mastoid. Thirty GVS were applied to the mastoid in the position cathode right anode left, followed by 30 in inverted position. SL and ML were measured.
RESULTS
SL and ML components were recorded from both legs of all participants and were similar. The average of SL component was 54 ms and of ML was 112 ms.
CONCLUSION
The components SL and ML of the VEMP response in soleus were reproducible and are useful measures of vestibular-spinal function.
简介
由电前庭刺激（GVS）产生的前庭诱发肌源性电位（VEMP）与前庭脊髓通路有关。从比目鱼肌记录到的反应是双相的，短潜伏期（SL）成分的起始约为 60 ms，中潜伏期（ML）成分约为 100 ms。第一个成分反映了耳石功能（椭圆囊和球囊），最后一个成分处理半规管。
目的
描述 GVS 产生的 VEMP。
方法
在这项横断面临床研究中，通过双耳 2 mA/400 ms GVS 产生 VEMP，频率为 5-6 ms，从 13 名健康成年人的比目鱼肌记录，平均年龄 56 岁。受试者保持站立，头部向与 GVS 施加于耳廓相对的一侧转动。将 30 个 GVS 施加到右侧阴极左侧阳极的位置，然后以相反的位置施加 30 个。测量 SL 和 ML。
结果
所有参与者的双腿都记录到了 SL 和 ML 成分，且相似。SL 成分的平均值为 54 ms，ML 的平均值为 112 ms。
结论
比目鱼肌 VEMP 反应的 SL 和 ML 成分具有可重复性，是前庭脊髓功能的有用测量指标。
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