Steady State Vestibular Evoked Myogenic Potentials

This study has been completed.
Sponsor:
Information provided by:
Universidade Estadual de Ciências da Saúde de Alagoas
ClinicalTrials.gov Identifier:
NCT01260077
First received: December 14, 2010
Last updated: NA
Last verified: February 2009
History: No changes posted
  Purpose

Objective: At present, vestibular evoked myogenic potentials are analyzed only in the time domain. A technique to evaluate this potential in the frequency domain could provide more information, but has only been applied within the last year. Design and Study Sample: In this study we recorded vestibular evoked myogenic potential in the time domain, in 156 ears of 78 normal-hearing young adults, at frequencies of 250, 500, 1000 and 2000 Hz, with intensity of 90 dB nHL. Next, the steady state vestibular evoked myogenic potential was recorded at the same carrying frequencies, modulated at 20, 37, 40, 43, 70, 77 and 80 Hz. Results: The responses found by modulated frequency, regardless of carrier, recorded a higher presence of peaks and mean amplitudes between 20 and 70 Hz, especially at 40 Hz. Conclusions: The results show that the observation technique in the frequency domain is feasible and shows a strong association with the time domain for recording vestibular evoked myogenic potentials, at carrying frequencies of 250, 500, 1000 or 2000 Hz.


Condition
Normal Vestibular Evoked Potentials in Frequency Domain

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Cross-Sectional
Official Title: Steady State Vestibular Evoked Myogenic Potentials

Further study details as provided by Universidade Estadual de Ciências da Saúde de Alagoas:

Primary Outcome Measures:
  • A technique to evaluate vestibular evoked myogenic potential in the frequency domain

Groups/Cohorts
Experimental group
The sample was composed of 78 individuals (156 ears), 40 females (80 ears) and 38 males (76 ears).

  Eligibility

Ages Eligible for Study:   18 Years to 35 Years
Genders Eligible for Study:   Both
Sampling Method:   Probability Sample
Study Population

Normal subjects.

Criteria

Inclusion criteria: age between 18 and 35 years and auditory threshold less than or equal to 20 dBHL, between 0.5 and 8 kHz, with inter-ear frequency difference less than or equal to 10 dB.

Exclusion criteria were: exposure to occupational or leisure noise; otological surgery; more than three ear infections within the last year; use of ototoxic medication; buzzing in the ear, vertigo, dizziness or other cochlear-vestibular symptoms ; presence of systemic alterations that could contribute to cochlear-vestibular pathologies, such as diabetes, hypertension, dyslipidemias and/or hormonal alterations.

  Contacts and Locations
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No Contacts or Locations Provided
  More Information

No publications provided by Universidade Estadual de Ciências da Saúde de Alagoas

Additional publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: PhD Pedro de Lemos Menezes, Professor, UNCISAL
ClinicalTrials.gov Identifier: NCT01260077     History of Changes
Other Study ID Numbers: CEP_UNCISAL_1010/2009
Study First Received: December 14, 2010
Last Updated: December 14, 2010
Health Authority: Brazil: Ministry of Health

ClinicalTrials.gov processed this record on October 29, 2014