Evaluation of cervical vestibular evoked myogenic potential measures using different stimulus types in patients with posterior canal benign paroxysmal positional vertigo.

Cervical Vestibular Evoked Myogenic Potential (cVEMP) measurements still do not have standard normative values in posterior canal benign paroxysmal positional vertigo (BPPV). We aimed to compare cVEMP recordings obtained with different stimuli applied in two different intensities in posterior canal BPPV patients. Thirty-four patients with unilateral posterior canal BPPV were included in the patient group. In cVEMP recordings obtained with different stimulus intensity [95 dB HL and 105 dB HL] and different stimuli[tone-burst cVEMP (T-cVEMP) and click cVEMP (C-cVEMP)]. When the C-cVEMP and T-cVEMP findings were compared in the patient group, differences were observed only in peak-to-peak p1-n1 amplitude values in the measurements performed with 95 dB stimulus. However, T-cVEMP measurements performed with 105 dB stimulus showed that both p1 and n1 latency values ​were longer and peak-to-peak p1-n1 amplitude values ​were higher than C-cVEMP measurements. We recommend using priorly tone-burst stimulus for measurements with 105 dB HL in cVEMP evaluations we will perform in posterior BPPV patients. Both stimulants can be used when 95 dB HL stimuli is used.