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Testing of all Six Semicircular Canals with Video Head Impulse Test Systems
Published on: April 18, 2019
Saccular sensitivity function measured by vestibular evoked myogenic potential.
Aline Cabral de Oliveira Barreto1, José Fernando Colafêmina, Pedro de Lemos Menezes
1Federal Universit of Sergipe, Brazil.
Acta Oto-Laryngologica
|February 16, 2011
Summary
Vestibular evoked myogenic potential (VEMP) responses are most effective with low-frequency tone bursts. This study analyzed VEMP parameters across various frequencies, finding significant differences in latency and amplitude.
Area of Science:
- Neuroscience
- Otolaryngology
- Audiology
Background:
- Saccular afferent frequency sensitivities are not well-documented.
- Vestibular evoked myogenic potentials (VEMPs) assess otolith function.
Purpose of the Study:
- To analyze VEMP latency and amplitude using tone bursts at 250, 500, 1000, and 2000 Hz.
- To determine the specific frequency sensitivities of saccular afferents.
Main Methods:
- VEMPs recorded from the sternocleidomastoid muscle in 156 ears.
- Tone burst stimuli at 250, 500, 1000, and 2000 Hz were used.
- Stimulus parameters included 95 dB nHL intensity and 5 Hz rate.
Main Results:
- VEMP responses were present across all tested frequencies.
- Lower p13 latencies were observed in women compared to men (except at 250 Hz).
- Higher amplitudes were noted at 250 and 500 Hz, with lower values at 2000 Hz.
Conclusions:
- Vestibular myogenic potential responses are more effective with low-frequency stimuli.
- Significant differences in VEMP parameters were found across frequencies, highlighting frequency-specific responses.
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