Is the nystagmus pattern in hemi-labyrinthectomized subjects during positional alcohol nystagmus 2 similar to that found in patients with cupulolithiasis in the lateral semicircular canal?
Conclusion: A positional nystagmus pattern compatible with a condition of a heavy cupula (cupulolithiasis) in the lateral semicircular canal could be reproduced in hemi-labyrinthectomized subjects during positional alcohol nystagmus 2 (PAN 2). The nystagmus pattern was opposite to that found in the...
| Publicado en: | Acta Oto-Laryngologica Vol. 133; no. 8; pp. 796 - 804 |
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| Autores principales: | , |
| Formato: | pictorial research tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
Aug2013
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=104194177&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104194177 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00016489 B6D jtl: Acta Oto-Laryngologica issn: 00016489 maglogo: Y pubinfo: dt: Aug2013 vid: 133 iid: 8 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 104194177 89025769 10.3109/00016489.2013.777472 NLM23565838 104194177 ppf: 796 ppct: 8 formats: fmt: @attributes: type: P tig: atl: Is the nystagmus pattern in hemi-labyrinthectomized subjects during positional alcohol nystagmus 2 similar to that found in patients with cupulolithiasis in the lateral semicircular canal? aug: au: Tomanovic, Tatjana Bergenius, Johan affil: Department of Audiology and Neurotology, Diagnostics and Dizziness Unit, Karolinska University Hospital; Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institute, Stockholm, Sweden sug: subj: Nystagmus, Pathologic Physiopathology Posture Physiology Semicircular Canals Physiopathology Calculi Physiopathology Vestibule, Labyrinth Surgery Human Male Female Adult Middle Age Ethanol Pharmacodynamics Body Positions Analysis of Variance Descriptive Statistics Repeated Measures Adult: 19-44 years Middle Aged: 45-64 years Male Female ab: Conclusion: A positional nystagmus pattern compatible with a condition of a heavy cupula (cupulolithiasis) in the lateral semicircular canal could be reproduced in hemi-labyrinthectomized subjects during positional alcohol nystagmus 2 (PAN 2). The nystagmus pattern was opposite to that found in the same subjects during PAN 1. The affected side could not be judged by applying Ewald's second law. Objectives: To mimic the condition of a heavy cupula in the lateral semicircular canal by using unilaterally deafferented subjects during PAN 2 and compare (a) results reported in the literature with those of patients with cupulolithiasis, and (b) the nystagmus findings in the same subjects during PAN 1. Methods: Five hemi-labyrinthectomized subjects were studied during PAN 2 when they kept their heads pointed straight forward or turned sideways in the prone and supine positions, respectively. Results: When the subjects were examined with their heads turned in the supine or prone positions, the alcohol-induced nystagmus pattern was compatible with that of cupulolithiasis. When the head was pointed straight forward in the prone and supine positions, the nystagmus directions were opposite to those found during PAN 1. Directional preponderance was not seen for the apogeotropic nystagmus for either ampullofugal or ampullopetal deviation of the cupula. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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