In order to evaluate vestibular function in migraine, electronystagmography (ENG) was used. Twenty migrainous patients in the headache free phase and free of drugs for at least one week prior to study, were studied. The ENG examination included spontaneous eye movements, bithermal caloric tests and rotatory tests.
The results showed vestibular abnormalities in sixteen patients (80%). Spontaneous nystagmus was found in nine patients (45%). Sixteen patients (80%) had adnormal caloric tests and fifteen (75%) had adnormal rotatory tests.
These findings suggest impairment in vestibular function in a large proportion of migrainous patients. The significance and a possible mechanism are discussed.