Cortical facilitation of somatosensory inputs using gravity-related tactile information in humans with vestibular hypofunction

Author:

Fabre Marie1,Beullier Laura1,Sutter Chloé1,Kebritchi Amirreza2,Chavet Pascale3,Simoneau Martin24ORCID,Toupet Michel56,Blouin Jean1,Mouchnino Laurence17ORCID

Affiliation:

1. CNRS, Laboratoire de Neurosciences Cognitives, Aix Marseille Université, Marseille, France

2. Centre Interdisciplinaire de Recherche en Réadaptation et Intégration Sociale (CIRRIS) du CIUSSS de la Capitale Nationale, Quebec City, Quebec, Canada

3. CNRS, Institut des Sciences du Mouvement, Aix Marseille Université, Marseille, France

4. Département de Kinésiologie, Faculté de Médecine, Université Laval, Quebec City, Quebec, Canada

5. IRON, Institut de Recherche en Oto-Neurologie, Paris, France

6. Centre d’Explorations Fonctionnelles Oto-Neurologiques, Paris, France

7. Institut Universitaire de France, Paris, France

Abstract

Somatosensory cortex excitability is greater in participants with bilateral vestibular hypofunction than in age-matched healthy humans. To control balance, healthy humans “locked” the head whereas participants with vestibular hypofunction “locked” their pelvis. For participants with vestibular hypofunction, increasing loading/unloading of the feet enhances the internal representation of body state in the posterior parietal cortex.

Funder

Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada

Publisher

American Physiological Society

Subject

Physiology,General Neuroscience

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