Normal Vestibular Evoked Potentials in Frequency Domain
Conditions
Brief summary
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.
Interventions
None listed
Sponsors
Universidade Estadual de Ciências da Saúde de Alagoas
Study design
Observational model
COHORT
Time perspective
CROSS_SECTIONAL
Eligibility
Sex/Gender
ALL
Age
18 Years to 35 Years
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.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| A technique to evaluate vestibular evoked myogenic potential in the frequency domain | — |
Outcome results
None listed