Abstract
Migraine and vertigo are common complaints seen in clinical practice, and in a few such cases, we also find epileptic manifestations, including migraine-triggered seizures. Currently, patients presenting with vertigo and headache are diagnosed according to established diagnostic criteria for Meniere's disease, vestibular migraine, or vestibular migraine/Meniere's disease overlapping syndrome. In addition to using those diagnostic criteria and the patient's history, cervical vestibular evoked myogenic potential and auditory middle latency responses are useful tools to better understand the physiological background of these patients and also to confirm the diagnosis. Here we report 2 cases: 1 of vestibular migraine/ Meniere's disease overlapping syndrome and 1 of vestibular migraine with epileptic manifestations. Each patient showed potentiation (lack of habituation) in auditory middle latency response, and each showed endolymphatic hydrops in cervical vestibular evoked myogenic potential. The potentiation in auditory middle latency response might be attributable to neuronal hyperexcitability in those patients with migraine or epilepsy, and neurogenic inflammation caused by migraine episodes might affect inner ear function.
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