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Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Neurol. | doi: 10.3389/fneur.2018.00972

Effect of Rotating Auditory Scene on Postural Control in Normal Subjects, Patients with Bilateral Vestibulopathy, Unilateral or Bilateral Cochlear Implants

Caroline Guigou1, 2,  Michel Toupet1, 3, Benoit Delemps1, Sylvie Heuschen3, Serge Aho1 and  Alexis Bozorg Grayeli1, 2*
  • 1Centre Hospitalier Regional Universitaire De Dijon, France
  • 2FRE2005 Laboratoire d'Electronique, d'Informatique et d'Image (LE2I), France
  • 3Centre d' Explorations Fonctionnelles Oto-Neurologiques Falguiére, France

Objective: The aim of this study was to investigate the impact of a rotating sound stimulation on the postural control in normal subjects, patients with bilateral vestibulopathy (BVP), unilateral (UCI) and bilateral (BCI) cochlear implantees.
Materials and Methods: Sixty-nine adults were included (32 women and 37 men) in a multicenter prospective study. The group included 37 healthy subjects, 10 BVP, 15 UCI and 7 BCI patients. The average of age was 47 ± 2.0 (range: 23-82). In addition to a complete audiovestibular work up, a dynamic posturography (Multitest Framiral, Grasse) was conducted in silence and with a rotating cocktail party sound delivered by headphone. The center of pressure excursion surface (COPS), sensory preferences, as well as fractal, diffusion and wavelet analysis of stabilometry were collected.
Results: The rotating sound seemed to influenced balance in all subgroups except in controls. COPS increased with sound in the BVP and BCI groups in closed eyes and sway-referenced condition indicating a destabilizing effect while it decreased in UCI in the same condition suggesting stabilization (p<0.05, linear mixed model corrected for age, n=69). BVP had higher proprioceptive preferences, BCI had higher vestibular and visual preferences and UCI had only higher vestibular preferences than controls. Sensory preferences were not altered by rotating sound.
Conclusions: The rotating sound destabilized BVP and BCI patients with binaural hearing while it stabilized UCI patients with monaural hearing and no sound rotation effect. This difference suggests that binaural auditory cues are exploited in BCI patients for their balance.

Keywords: binaural hearing, Stereophony, balance, bilateral vestibulopathy, posturography, multisensory integration

Received: 10 Sep 2018; Accepted: 29 Oct 2018.

Edited by:

Yuri Agrawal, Johns Hopkins University, United States

Reviewed by:

Eduardo Martin-Sanz, University Hospital of Getafe, Spain
Juan C. Amor-Dorado, Hospital Can Misses, Spain  

Copyright: © 2018 Guigou, Toupet, Delemps, Heuschen, Aho and Bozorg Grayeli. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Prof. Alexis Bozorg Grayeli, Centre Hospitalier Regional Universitaire De Dijon, Dijon, 21079, Burgundy, France, alexis.bozorggrayeli@free.fr