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Direction-Changing and Direction-Fixed Positional Nystagmus in Patients With Vestibular Neuritis and Meniere Disease
Article de En | WPRIM | ID: wpr-763320
Bibliothèque responsable: WPRO
ABSTRACT
OBJECTIVES: Direction-changing positional nystagmus (PN) was considered to indicate the presence of benign paroxysmal positional vertigo involving lateral semicircular canal in most cases. We investigated the incidence of PN on the supine head-roll test and compared the characteristics of nystagmus in patients with vestibular neuritis (VN) and Meniere disease (MD). METHODS: A retrospective review of patients, who were diagnosed with unilateral VN or unilateral definite MD between September 2005 and November 2011, was conducted. Sixty-five VN patients and 65 MD patients were enrolled. Eye movements were recorded for 30–60 seconds at the positions of sitting, head roll to the right, and head roll to the left, and maximum slow-phase eye velocity was calculated. PN was classified as direction-fixed (paretic or recovery) and direction-changing (geotropic or apogeotropic). RESULTS: Spontaneous nystagmus was observed in 57 patients (87%, the slow-phase eye velocity of 7°/sec±5°/sec) with acute VN, 39 (60%, 2°/sec±1°/sec) with follow-up VN, and 32 (49%, 2°/sec±2°/sec) with MD. Direction-fixed PN was the most common type. Direction-fixed paretic type was most common in acute VN (80%) and follow-up VN (42%), and direction-fixed recovery type was most common in MD (31%). Paretic type was significantly more common in acute VN (80%) than in follow-up VN (42%) and MD (26%), and the recovery type was significantly more common in MD (31%) than in acute VN (3%) and follow-up VN (14%). Direction-changing PN was more common in MD (22%), followed by follow-up VN (14%) and acute VN (9%). CONCLUSION: Though direction-fixed paretic PN was most common in VN and MD patients, direction-changing PN could be observed in a few patients (9%–20%) with peripheral vestibular disorders regardless of the duration from the onset of dizziness, suggesting the presence of otolith-related dizziness.
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Texte intégral: 1 Indice: WPRIM Sujet Principal: Nystagmus physiologique / Canaux semicirculaires osseux / Incidence / Études rétrospectives / Études de suivi / Névrite vestibulaire / Sensation vertigineuse / Mouvements oculaires / Vertige positionnel paroxystique bénin / Tête Type d'étude: Incidence_studies / Observational_studies / Prognostic_studies / Risk_factors_studies Limites du sujet: Humans langue: En Texte intégral: Clinical and Experimental Otorhinolaryngology Année: 2019 Type: Article
Texte intégral: 1 Indice: WPRIM Sujet Principal: Nystagmus physiologique / Canaux semicirculaires osseux / Incidence / Études rétrospectives / Études de suivi / Névrite vestibulaire / Sensation vertigineuse / Mouvements oculaires / Vertige positionnel paroxystique bénin / Tête Type d'étude: Incidence_studies / Observational_studies / Prognostic_studies / Risk_factors_studies Limites du sujet: Humans langue: En Texte intégral: Clinical and Experimental Otorhinolaryngology Année: 2019 Type: Article