Torsional eye movements in patients with skew deviation and spasmodic torticollis: Responses to static and dynamic head roll
| Autor: | Jose I. Suarez, A. D. Pettee, Richard Leigh, Klaus G. Rottach, Ari Z. Zivotofsky, Bernd F. Remler, Lea Averbuch-Heller |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Adult
Male Torsion Abnormality medicine.medical_specialty Eye Movements Movement Vision Disorders Spasmodic Torticollis Fixation Ocular Nystagmus Ophthalmology medicine Humans Skew deviation Torticollis Aged Brain Diseases business.industry Skew Eye movement Reflex Vestibulo-Ocular Anatomy Middle Aged medicine.disease Vestibule Female Vestibule Labyrinth Neurology (clinical) medicine.symptom business Head Brain Stem |
| Zdroj: | Neurology. 48:506-514 |
| ISSN: | 1526-632X 0028-3878 |
| Popis: | We measured torsional eye movements induced by sinusoidal rotation or static tilt, of the head in roll while viewing a far or near target in 4 patients with skew deviation due to brainstem lesions, 4 patients with spasmodic torticollis (ST), 2 patients with unilateral eighth nerve section (VIIIS), and 10 normal subjects. Torsional nystagmus was present in all 4 patients with skew deviation. In subjects and patients, responses to both sinusoidal and static roll were larger while viewing the far target, consistent with factors dictated by geometry. Response gains to sinusoidal roll were abnormal in 3 patients with skew (increased in one, decreased in two), abnormal in 3 with ST (increased in 1, decreased in 2), and in abnormal both VIIIS patients (decreased). Greater abnormalities were evident in 3 skew patients while rolling away from the side of their brainstem lesions and in both VIIIS patients while rolling toward their lesioned ears. There were similar but less pronounced changes during static head roll. We conclude that patients with skew, ST, and VIIIS may all have abnormal ocular counter-rolling that is more evident during dynamic testing while viewing a far target. Such abnormalities endure because of the limited influence exerted by vision on torsional eye movements. |
| Databáze: | OpenAIRE |
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