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The effect of galvanic vestibular stimulation on distortion product otoacoustic emissions.
- Source :
-
Journal of vestibular research : equilibrium & orientation [J Vestib Res] 2012; Vol. 22 (1), pp. 17-25. - Publication Year :
- 2012
-
Abstract
- Galvanic stimulation has long been used as a nonmechanical means of activating the vestibular apparatus through direct action on the vestibular nerve endings. This stimulation has been reported to be safe, but no studies have examined the potential changes in the corresponding cochlear receptors. The aim of the present study was to evaluate the effect of galvanic vestibular stimulation (GVS) on distortion product otoacoustic emissions (DPOAEs). Fourteen subjects underwent DPOAEs during several conditions of GVS. The DPOAEs ranged from ∼ 1 kHz to ∼ 8 kHz at 65/55 dB for f1/f2 and with an f2/f1 ratio of 1.2. The subjects were evaluated at 10 stimulation conditions that ranged from -2.0 mA to +2.0 mA for each frequency. Statistical analysis showed no significant differences in DPOAE amplitudes for all conditions with and without GVS. Results also showed no significant differences between DPOAE amplitudes before and after GVS. Multivariate analysis found subject variability in DPOAE amplitude, which was not thought to be GVS related. Results indicated that GVS produced neither temporary nor permanent changes in DPOAEs.
- Subjects :
- Adult
Biomechanical Phenomena physiology
Cochlea physiology
Electrophysiological Phenomena physiology
Female
Galvanic Skin Response physiology
Humans
Male
Multivariate Analysis
Young Adult
Acoustic Stimulation methods
Otoacoustic Emissions, Spontaneous physiology
Vestibule, Labyrinth physiology
Subjects
Details
- Language :
- English
- ISSN :
- 1878-6464
- Volume :
- 22
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Journal of vestibular research : equilibrium & orientation
- Publication Type :
- Academic Journal
- Accession number :
- 22699149
- Full Text :
- https://doi.org/10.3233/VES-2012-0444