Vestibular evoked myogenic and auditory brainstem evoked potentials in a female migraine population

Background and purpose - The purpose of the present study was to evaluate ocular vestibular evoked myogenic potential (oVEMP), cervical vestibular evoked myogenic potential (cVEMP), and brainstem auditory evoked potential (BAEP) response charac- teristics and to understand the pathophy- siology of vestibular dysfunction in female migraineurs with vertigo symptoms. We also aimed to assess the electrophysiological diagnostic significance of the VEMP respon- ses in vestibular migraine (VM). Methods - 23 patients with migraine with- out aura (MoA), 23 patients with VM, and 20 sex -and age -matched healthy controls, total of 66 female participants were enrolled in this study. The outcome parameters were asymmetry ratios (ARs), amplitudes of oVEMP, cVEMP, N1P1, P13N23, and the respective latencies (mean +/- SD). From the BAEP graphs, absolute and interpeak interval latencies of waves were analyzed. Results - 30.4% of the MoA group and 21.7% of the VM group had uni- or bilater- ally absent cVEMP responses which were statistically significant only in the MoA group (p=0.035) in comparison to control group. Both groups displayed statistically insignifi- cant absent or asymmetrical responses for oVEMP (13.1%). Cervical VEMP P13 and N23 latency, peak-to -peak amplitude, interaural latencies, and amplitude ARs did not show any significant difference between MoA and VM patients and healthy controls. No significant difference was detected among the three groups in the oVEMP and BAEP parameters. Conclusion - Although absent cVEMP responses were more common in MoA and VM patients than in healthy individuals, the VEMP and BAEP test results should used in the differential diagnosis of MoA.