Subliminal galvanic-vestibular stimulation recalibrates the distorted visual and tactile subjective vertical in right-sided stroke

Neuropsychologia
Karin OppenländerAnna-Katharina Schaadt

Abstract

Stroke of the right cerebral hemisphere often causes deficits in the judgement of the subjective visual vertical (SVV) and subjective tactile vertical (STV) which are related to central vestibular functioning. Clinically, deficits in the SVV/STV are linked to balance problems and poor functional outcome. Galvanic Vestibular Stimulation (GVS) is a non-invasive, save stimulation technique that induces polarity-specific changes in the cortical vestibular systems. Subliminal GVS induces imperceptible vestibular stimulation without unpleasant side effects. Here, we applied bipolar subliminal GVS over the mastoids (mean intensity: 0.7 mA, 20 min duration per session) to investigate its online-influence on constant errors, difference thresholds and range values in the SVV and STV. 24 patients with subacute, single, unilateral right hemisphere stroke were studied and assigned to two patient groups (impaired vs. normal in the SVV and STV) on the basis of cut-off scores from healthy controls. Both groups performed these tasks under three experimental conditions on three different days: a) sham GVS where electric current was applied only for 30s and then turned off, b) left-cathodal GVS and c) right-cathodal GVS, for a period of 20 min pe...Continue Reading

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Citations

Jun 11, 2015·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Lena SchmidtKathrin S Utz
Apr 16, 2016·Annals of Physical and Rehabilitation Medicine·C Piscicelli, D Pérennou
Nov 10, 2017·Frontiers in Neurology·Amir Kheradmand, Ariel Winnick
Apr 18, 2019·Journal of Neurophysiology·Julia DlugaiczykHans Straka
Dec 19, 2015·Current Opinion in Neurology·Christophe Lopez
Sep 5, 2019·The Journal of Physiology·Navid Khosravi-HashemiJean-Sébastien Blouin
Jan 23, 2018·Experimental Brain Research·Katerina CabolisElisa Raffaella Ferrè
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Jan 9, 2018·Physiotherapy Theory and Practice·Gozde YagciEngin Simsek
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Feb 24, 2021·Expert Review of Neurotherapeutics·Soojin LeeMartin J McKeown
Apr 22, 2021·Journal of Neurophysiology·Youstina MikhailDorothy Barthélemy
Jul 26, 2021·Neuropsychologia·Gabriele De MaioElisa Raffaella Ferré

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