title: Vestibular evoked myogenic potential (VEMP) with galvanic stimulation in normal subjects.
abstract: BACKGROUND
  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.
  
  
  OBJECTIVE
  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.
  
  
  CONCLUSIONS
  The components SL and ML of the VEMP response in soleus were reproducible and are useful measures of vestibular-spinal function.
authors.affiliation: 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.
authors.forename: Luciana Cristina Matos
authors.initials: LC
authors.lastname: Cunha
authors.affiliation: 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.
authors.forename: Ludimila
authors.initials: L
authors.lastname: Labanca
authors.affiliation: Universidade Católica de Pelotas, PelotasRS, Brasil, Universidade Católica de Pelotas, Pelotas, RS, Brasil.
authors.forename: Maurício Campelo
authors.initials: MC
authors.lastname: Tavares
authors.affiliation: 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.
authors.forename: Denise Utsch
authors.initials: DU
authors.lastname: Gonçalves
mesh_terms: D003430:Cross-Sectional Studies; D004558:Electric Stimulation / Q000379:methods*; D004576:Electromyography; D005260:Female; D005712:Galvanic Skin Response / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D004856:Postural Balance; D058585:Vestibular Evoked Myogenic Potentials / Q000502:physiology*