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Published on: August 28, 2019
Vestibular evoked myogenic potentials using low frequency stimuli.
Aline Cabral de Oliveira1, José Fernando Colafêmina, Pedro de Lemos Menezes
1Faculdade de Medicina de Ribeirão Preto- USP, Universidade Federal de Sergipe.
Brazilian Journal of Otorhinolaryngology
|December 21, 2011
Summary
This study establishes normative values for vestibular evoked myogenic potentials (VEMPs) using low-frequency stimuli. These findings provide essential reference data for assessing the vestibulocervical reflex in young, healthy individuals.
Area of Science:
- Neuroscience
- Audiology
- Otolaryngology
Background:
- Vestibular evoked myogenic potentials (VEMPs) are crucial vestibulocervical reflexes elicited by sound stimulation of the saccule.
- Establishing normality parameters for VEMPs, particularly with low-frequency stimuli, is essential for accurate clinical assessment in young, healthy individuals.
Purpose of the Study:
- To determine and establish normative standards for vestibular evoked myogenic potentials (VEMPs) when using low-frequency auditory stimulation.
- To provide reliable reference data for the interpretation of VEMP tests in audiological and neurological evaluations.
Main Methods:
- A clinical observational, cross-sectional study was conducted on 160 ears.
- Vestibular evoked myogenic potentials (VEMPs) were recorded from the ipsilateral sternocleidomastoid muscle.
- Tone-burst stimuli at 250 Hz and 95 dB intensity were used, with 200 averaged responses captured.
Main Results:
- Analysis using t-test and Mann-Whitney test revealed no significant differences in VEMP latency or amplitude (p < 0.05).
- Mean latencies for p13-n23 and p13-n23 interpeaks were 13.84 ms (±1.41) and 23.81 ms (±1.99), respectively.
- Amplitude asymmetry between ears was observed at 13.48% in females and 3.81% in males.
Conclusions:
- Low-frequency stimuli effectively generate VEMPs with appropriate morphology and amplitude.
- The study successfully established standard values for VEMPs at low frequencies in normal individuals.
- These normative data are valuable for clinical applications in audiology and neurology.
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