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Journal of Neurology

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01-10-2018 | Original Communication

Noisy vestibular stimulation improves vestibulospinal function in patients with bilateral vestibulopathy

Authors: R. Schniepp, J. C. Boerner, J. Decker, K. Jahn, T. Brandt, Max Wuehr

Published in: Journal of Neurology | Special Issue 1/2018

Abstract

Objectives

To examine the mechanism underlying previously reported ameliorating effects of noisy galvanic vestibular stimulation (GVS) on balance performance in patients with bilateral vestibulopathy (BVP) and determine those patients (incomplete versus complete vestibular loss) that might benefit from this intervention.

Methods

Vestibulospinal reflex thresholds were determined in 12 patients with BVP [2 with complete loss (cBVP) and 10 with residual function (rBVP)]. Patients were stimulated with 1 Hz sinusoidal GVS of increasing amplitudes (0–1.9 mA). Coherence between GVS input and stimulation-induced body motion was determined and psychometric function fits were subsequently used to determine individual vestibulospinal reflex thresholds. The procedure was repeated with an additional application of imperceptible white noise GVS (nGVS).

Results

All patients with rBVP but none with cBVP exhibited stimulation-induced vestibulospinal reflex responses with a mean threshold level of 1.26 ± 0.08 mA. Additional nGVS resulted in improved processing of weak subthreshold vestibular stimuli (p = 0.015) and thereby effectively decreased the vestibulospinal threshold in 90% of patients with rBVP (mean reduction 17.3 ± 3.9%; p < 0.001).

Conclusion

The present findings allow to identify the mechanism by which nGVS appears to stabilize stance and gait performance in patients with BVP. Accordingly, nGVS effectively lowers the vestibular threshold to elicit balance-related reflexes that are required to adequately regulate postural equilibrium. This intervention is only effective in the presence of a residual vestibular functionality, which, however, applies for the majority of patients with BVP. Low-intensity noise stimulation thereby provides a non-invasive treatment option to optimize residual vestibular resources in BVP.

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Title: Noisy vestibular stimulation improves vestibulospinal function in patients with bilateral vestibulopathy
Authors: R. Schniepp
J. C. Boerner
J. Decker
K. Jahn
T. Brandt
Max Wuehr
Publication date: 01-10-2018
Publisher: Springer Berlin Heidelberg
Published in: Journal of Neurology / Issue Special Issue 1/2018
Print ISSN: 0340-5354
Electronic ISSN: 1432-1459
DOI: https://doi.org/10.1007/s00415-018-8814-y

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Noisy vestibular stimulation improves vestibulospinal function in patients with bilateral vestibulopathy

Abstract

Objectives

Methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Objectives

Methods

Results

Conclusion

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