Читать книгу Vestibular Disorders - Группа авторов - Страница 21

Ask the patient to sit on a swivel chair with arms extended, hands clasped and thumbs pointing up. Rotate the patient en bloc in the yaw plane as the patient fixates on his/her own thumbs. Inspect the eyes for fast phases. In a normal subject with normal VOR cancellation, the eyes remain fixed on the target and no fast phases are observed. In cerebellar disorders and in disorders of smooth pursuit, VOR cancellation is impaired and fast phases toward the direction of rotation are seen.