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Chirp-Evoked VEMPs: A Test-Retest Reliability Study.

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  • 1Department of Speech-Language Pathology and Audiology, University of Pretoria, South Africa.

Ear and Hearing
|August 15, 2023
PubMed
Summary
This summary is machine-generated.

The 500 Hz narrowband CE-Chirp stimulus demonstrated better test-retest reliability for cervical vestibular-evoked myogenic potentials (cVEMP) compared to the broadband CE-Chirp. Ocular VEMP reliability was poor for both stimuli.

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Area of Science:

  • Audiology
  • Neuroscience
  • Vestibular System

Background:

  • Vestibular-evoked myogenic potentials (VEMPs) are crucial for assessing vestibular and auditory pathway function.
  • CE-Chirp stimuli offer potential advantages over traditional tone bursts for VEMP elicitation.
  • Understanding the test-retest reliability of different CE-Chirp stimuli is essential for clinical application.

Purpose of the Study:

  • To evaluate the test-retest reliability of cervical and ocular VEMPs (c&oVEMP).
  • To compare the reliability of 500 Hz narrowband (NB) CE-Chirp and broadband (BB) CE-Chirp stimuli.
  • To assess both within-session and between-session reliability.

Main Methods:

  • Twenty healthy participants underwent bilateral c&oVEMP recordings.
  • Stimuli included 500 Hz NB CE-Chirp and BB CE-Chirp at 95 dB nHL air-conducted.
  • Testing was performed twice within a single session and again one week later.

Main Results:

  • Moderate to good between-session reliability (ICC 0.52-0.82) was found for NB CE-Chirp cVEMP latency, amplitude, and asymmetry ratio.
  • BB CE-Chirp showed good reliability for cVEMP amplitude (ICC 0.70, 0.84) but poor reliability for latency and asymmetry ratio (ICC 0.30-0.42).
  • Both NB and BB CE-Chirp stimuli exhibited poor between-session reliability for oVEMPs.

Conclusions:

  • The 500 Hz NB CE-Chirp is more reliable for cVEMP assessment than the BB CE-Chirp.
  • Further research with standard electrode montages is needed to clarify oVEMP reliability with chirp stimuli.