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Visually enhanced vestibulo-ocular reflex: a diagnostic tool for migraine vestibulopathy.

Laryngoscope 2006 September
OBJECTIVES: 1) To compare the incidence of elevated visually enhanced vestibular-ocular reflex (VVOR) rotational gain during rotational chair testing in a normal control group versus a group of patients diagnosed with migraine vestibulopathy; 2) to discuss the possible application of VVOR gain during rotational chair testing for diagnosing migraine vestibulopathy.

STUDY DESIGN: Prospective normal control group and retrospective cohort comparison.

METHODS: 1) Prospective rotational chair studies including VVOR in 20 normal control patients; 2) retrospective review of vestibular studies including VVOR in 100 consecutive patients with migraine vestibulopathy.

RESULTS: Twenty of the normal controls and 69 of the migraine vestibulopathy patients met all inclusion criteria. One of 20 (5%) normal control patients had elevated VVOR gain, whereas 49 of 69 (71%) of migraine vestibulopathy patients had elevated VVOR gain.

CONCLUSIONS: VVOR gain normal criteria were appropriate in 95% of our normal control test group. VVOR gain was more frequently elevated in migraine vestibulopathy patients than in the normal controls, and the difference was significant (P < .001). VVOR gain elevation was the most common vestibular test abnormality in this cohort of patients with migraine vestibulopathy. Because VVOR measures visual-vestibular interaction and its central connections, this parameter may be a useful diagnostic tool for migraine vestibulopathy in patients manifesting disequilibrium and motion sensitivity.

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