Ocular VEMPs indicate repositioning of otoconia to the utricle after successful liberatory maneuvers in benign paroxysmal positioning vertigo

Autor:	Julian Teufel, Otmar Bayer, Yuri Agrawal, Michael Strupp, Olympia Kremmyda, Thomas Brandt, Tatiana Bremova
Rok vydání:	2013
Předmět:	Adult Male medicine.medical_specialty Utricular macula Vestibular evoked myogenic potential Posture Nystagmus Otolithic membrane Audiology Patient Positioning Article Otolithic Membrane Utricle Vertigo otorhinolaryngologic diseases Humans Medicine In patient Benign Paroxysmal Positional Vertigo Prospective Studies Saccule and Utricle Aged Aged 80 and over biology business.industry Posterior Semicircular Canal General Medicine Middle Aged Vestibular Function Tests biology.organism_classification Vestibular Evoked Myogenic Potentials medicine.anatomical_structure Otorhinolaryngology Female sense organs medicine.symptom business Follow-Up Studies
Zdroj:	Acta Oto-Laryngologica. 133:1297-1303
ISSN:	1651-2251 0001-6489
DOI:	10.3109/00016489.2013.829922
Popis:	This study showed a transient increase of ocular vestibular evoked myogenic potential (oVEMP) amplitudes in the affected ear after successful liberatory maneuvers and no changes in cervical VEMP (cVEMP) amplitudes. These findings support the hypothesis that successful liberatory maneuvers can lead to a repositioning of otoconia to the utricle.To evaluate whether oVEMP amplitudes increase after successful liberatory maneuvers in patients with posterior semicircular canal benign paroxysmal positioning vertigo (pc-BPPV), while cVEMP amplitudes do not change. These findings may indicate a successful repositioning of dislodged otoconia to the utricular macula, but not to the saccular macula.Thirty patients with unilateral pc-BPPV were prospectively examined with bone-conducted oVEMP and air-conducted cVEMP at four time points: before, after, 1 week after, and 1 month after the liberatory maneuvers (Sémont maneuvers).At the 1-week follow-up, 20 of 30 patients were asymptomatic (responders); BPPV could still be induced in the other 10 (non-responders). In responders the mean n10 amplitude on the affected side increased from 12 ± 6.5 µV at baseline (before the treatment) to 15.9 ± 7.1 µV at 1 week after treatment; this increase was significantly (p = 0.001) higher in responders than in non-responders. cVEMP did not differ significantly.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2388b20f7e7c437ca3a1e87f390389f9 https://doi.org/10.3109/00016489.2013.829922 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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