Please join us for our next speaker in the School’s 2023/24 colloquium series, May Elbar, who will be presenting, ‘Normal Values for Cervical and Ocular Vestibular-Evoked Myogenic Potentials: Comparison of air conducted (AC) and vibratory stimuli (bone conduction-BC)‘
WHEN: Wednesday, 6 December 2023 @ 12:35pm (regular colloquium time)
WHERE: Room 355, Friedman Building or virtual (see below for link)
TITLE:
Normal Values for Cervical and Ocular Vestibular-Evoked Myogenic Potentials: Comparison of air conducted (AC) and vibratory stimuli (bone conduction-BC)
OVERVIEW: The use of vestibular-evoked myogenic potentials (VEMP) can be an effective diagnostic tool when investigating the presence of various vestibular and audiological disorders. However, the scientific community lacks consistent normative clinical techniques and a baseline understanding of responses for a diverse population. These factors limit clinicians from utilizing VEMP in an effective diagnostic manner. The current protocols show variability in results, replicability, technical procedures, and population diversity (age, gender, race, structural differences, etc.).
OBJECTIVES:
- Obtain normative data on using a bone conductor during cVEMP and oVEMP testing.
- To obtain and compare VEMP response rates, wave morphology quality, thresholds, absolute latency, loudness judgment, and interaural amplitudes using air and bone conduction across a diverse population.
METHODOLOGY: A total of 13 young adults with normal hearing between the ages of 18 and 29 years of age were recruited to participate in repeated measures of VEMP and auditory assessment. Twenty-six typical ears will be included in the study. All participants have attended a single 120-160-minute test session.
RESULTS: Waveform morphology was significantly better in BC cVEMP and BC oVEMP when compared to AC VEMP using an expert judge. The loudness scale of the stimulus was significantly lower in BC cVEMP and BC oVEMP compared to AC cVEMP and AC oVEMP.
Bone conduction stimulation produces a significantly higher response rate (100%) in oVEMP when compared to AC oVEMP response rate (90.9%). BC oVEMP has a significant reduction of N1 latency and interaural asymmetry ratio. There was a significant reduction in P1 latency in BC cVEMP.
BIO:
May is a Ph.D. student at the school of Audiology and Speech Sciences. She received her Mater degree in Audiology from Menoufia University, Egypt. She has been practicing Audiology and Vestibular assessment since 2014. Her research project is about “Assessment of the long-term auditory and vestibular function in hospitalized and non-hospitalized COVID-19 patients.”
We look forward to seeing you on December 6th at 12:35pm! If you plan to join us virtually, please click here to RSVP for the Zoom session.