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Ocular VEMPs indicate repositioning of otoconia to the utricle after successful liberatory maneuvers in benign paroxysmal positioning vertigo.
- Source :
-
Acta oto-laryngologica [Acta Otolaryngol] 2013 Dec; Vol. 133 (12), pp. 1297-303. - Publication Year :
- 2013
-
Abstract
- Conclusions: 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.<br />Objectives: 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.<br />Methods: 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).<br />Results: 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.
- Subjects :
- Adult
Aged
Aged, 80 and over
Benign Paroxysmal Positional Vertigo
Female
Follow-Up Studies
Humans
Male
Middle Aged
Otolithic Membrane physiopathology
Prospective Studies
Vertigo physiopathology
Patient Positioning
Posture physiology
Saccule and Utricle physiopathology
Vertigo rehabilitation
Vestibular Evoked Myogenic Potentials physiology
Vestibular Function Tests methods
Subjects
Details
- Language :
- English
- ISSN :
- 1651-2251
- Volume :
- 133
- Issue :
- 12
- Database :
- MEDLINE
- Journal :
- Acta oto-laryngologica
- Publication Type :
- Academic Journal
- Accession number :
- 24245699
- Full Text :
- https://doi.org/10.3109/00016489.2013.829922