Open AccessThe Vestibular-Evoked Postural Response of Adolescents with Idiopathic Scoliosis Is Altered
Author(s) -
Jean Pialasse,
Martin Descarreaux,
Pierre Mercier,
Jean Blouin,
Martin Simoneau
Publication year - 2015
Publication title -
hal (le centre pour la communication scientifique directe)
Language(s) - English
DOI - 10.1371/journal.pone.0143124.t001
Subject(s) - idiopathic scoliosis , vestibular system , audiology , physical medicine and rehabilitation , scoliosis , vestibular evoked myogenic potential , psychology , medicine , psychiatry
International audienceAdolescent idiopathic scoliosis is a multifactorial disorder including neurological factors. A dysfunction of the sensorimotor networks processing vestibular information could be related to spine deformation. This study investigates whether feed-forward vestibulomotor control or sensory reweighting mechanisms are impaired in adolescent scoliosis patients. Vestibu-lar evoked postural responses were obtained using galvanic vestibular stimulation while participants stood with their eyes closed and head facing forward. Lateral forces under each foot and lateral displacement of the upper body of adolescents with mild (n = 20) or severe (n = 16) spine deformation were compared to those of healthy control adolescents (n = 16). Adolescent idiopathic scoliosis patients demonstrated greater lateral displacement and net lateral forces than controls both during and immediately after vestibular stimulation. Altered sensory reweighting of vestibular and proprioceptive information changed balance control of AIS patients during and after vestibular stimulation. Therefore, scoliosis onset could be related to abnormal sensory reweighting, leading to altered sensorimotor processes