title: A visual suppression test using post-rotatory nystagmus.
abstract: The visual suppression test is one method for examining the function of visual fixation and visual influence on vestibular nystagmus. In this study the visual suppression test using post-rotatory nystagmus was investigated in 65 normal subjects and 142 clinical cases with cerebellar lesions. In 65 normal subjects the mean +/- standard deviation of visual suppression of the slow phase velocity on post-rotatory nystagmus was 69 +/- 11%. As to the stimulation for visual suppression test, the post-rotatory method using rotatory stimulation is milder than caloric stimulation. This method is far simpler to analyze than the visual suppression test using pendular rotatory nystagmus and other vestibulo-ocular reflex tests. In the 142 patients with cerebellar lesions, reduced or abolished visual suppression on post-rotatory nystagmus was seen in 89 patients with radiologically confirmed disturbances in the vestibulo-cerebellum. And this method could identify the lesion side in the cerebellum. These results showed a correlation between the visual suppression test using post-rotatory nystagmus and one using caloric nystagmus in 65 normal subjects and 142 clinical cases with cerebellar lesions.
authors.affiliation: Department of Neurotology, Saitama Medical School, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Teramoto
mesh_terms: D002150:Caloric Tests; D002531:Cerebellum / Q000000981:diagnostic imaging / Q000473:pathology; D004584:Electronystagmography; D005260:Female; D006801:Humans; D008297:Male; D009760:Nystagmus, Physiologic / Q000502:physiology*; D010775:Photic Stimulation; D012027:Reflex, Vestibulo-Ocular; D014057:Tomography, X-Ray Computed; D014786:Vision Disorders / Q000503:physiopathology; D014793:Visual Cortex / Q000503:physiopathology*