Prevalence of Abnormal Cervical Vestibular Evoked
Myogenic Potential (CVEMP) Responses in Dizzy Patients
Following Mild Traumatic Brain Injury
Volume 6 - Issue 5
Dr. Eytan A David MD, FRCSC*, Kira Shalinsky BSc
- Department of Surgery, University of British Columbia, Canada
Received:June 12, 2021; Published:June 22, 2021
Corresponding author: Eytan A David, Department of Surgery, University of British Columbia, Canada
DOI: 10.32474/SJO.2021.06.000249
Abstract
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Abstract
Objective: We sought to assess the feasibility of cervical vestibular evoked myogenic potential (cVEMP) as a diagnostic tool for
patients experiencing dizziness after mild traumatic brain injury (mTBI) in tertiary neurotology clinic. We used cVEMP to estimate
the prevalence of saccular dysfunction after mTBI.
Design: This was a cross-sectional study of patients referred to a tertiary neurotology clinic for dizziness after mTBI. These patients
were given a standard neurotology clinical examination and vestibular assessment in addition to a cVEMP test.
Results: 20 of 63 (31.7%) patients had an abnormal cVEMP response. 75% of these subjects showed no deficiency by clinical exam
or VNG and 50% registered a deficiency by pure tone audiometry (PTA).
Conclusions: We found that abnormal cVEMP responses were common in dizzy patients post-mTBI and many had normal results
in standard neurotological/vestibular tests. cVEMP may help identify those with vestibular dysfunction associated with saccular
injury after mTBI.
Keywords: Vestibular evoked myogenic potential; TBI; cVEMP, saccule
Abbreviations: TBI: Traumatic Brain Injury; VEMP: Vestibular Evoked Myogenic Potential; SCM: Sternocleidomastoid; PTA: Pure
Tone Audiometry; IAD: Interaural Amplitude Difference; PPPD: Persistent Postural Positional Dizziness
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