NDLI: Can an electro-tactile vestibular substitution system improve balance in patients with unilateral vestibular loss under altered somatosensory conditions from the foot and ankle?

Content Provider	IEEE Xplore Digital Library
Author	Vuillerme, N. Hlavackova, P. Franco, C. Diot, B. Demongeot, J. Payan, Y.
Copyright Year	2011
Description	Author affiliation: IDS, 2 avenue des Puits, 71300 Montceau-les-Mines, France (Diot, B.) \|\| TIMC-IMAG Laboratory, UMR UJF CNRS 5525, Faculty of Medicine, 38706 La Tronche Cedex, France (Payan, Y.) \|\| TIMC-IMAG Laboratory, UMR UJF CNRS 5525, Grenoble, France (Vuillerme, N.) \|\| FRE 3405 AGIM (AGeing Imaging Modeling) Laboratory, CNRS-UJF-EPHE, Faculty of Medicine, 38706 La Tronche Cedex, France (Hlavackova, P.; Franco, C.; Demongeot, J.)
Abstract	This pilot study aimed at assessing the feasibility and the effectiveness of an electro Electro-tactile Vestibular Substitution System (EVSS) in patients with unilateral vestibular loss under normal and altered somatosensory conditions from the foot and ankle. Four unilateral vestibular-defective patients voluntarily participated in the experiment. They were asked to stand upright as still as possible with their eyes closed in two Normal and Altered foot and ankle sensory conditions. In the Normal condition, the postural task was executed on a firm support surface constituted by the force platform. In the Altered condition, a 2-cm thick foam support surface was placed under the participants' feet. These two foot and ankle sensory conditions were executed under two No EVSS and EVSS experimental conditions. The No EVSS condition served as a control condition. In the EVSS condition, participants executed the postural task using a biofeedback system whose underlying principle consisted of supplying them with additional information about their head orientation/motion with respect to gravitational vertical through electro-tactile stimulation of their tongue. Centre of foot pressure displacements (CoP) were recorded using the force platform. Results showed that, relative to the No EVSS condition, the EVSS condition decreased CoP displacements in both the Normal and the Altered foot and ankle sensory conditions. Interestingly, the stabilizing effect was more pronounced in the Altered than in the Normal foot and ankle sensory condition. These preliminary results suggest that patients with unilateral vestibular loss were able to take advantage to a head position-based electro-tactile tongue biofeedback to mitigate the postural perturbation induced by alteration of somatosensory input from the foot and the ankle.
Starting Page	1323
Ending Page	1326
File Size	497872
Page Count	4
File Format	PDF
ISBN	9781424441211
ISSN	1557170X
e-ISBN	9781457715891
e-ISBN	9781424441228
DOI	10.1109/IEMBS.2011.6090311
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-08-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Foot Tongue Arrays Head Accelerometers Electrodes Visualization
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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