title: The Vestibular-Evoked Postural Response of Adolescents with Idiopathic Scoliosis Is Altered.
abstract: Adolescent 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. Vestibular 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.
authors.affiliation: Faculté de médecine, Département de kinésiologie, Université Laval, Québec, QC, Canada.|Centre de recherche du CHU de Québec, Québec, QC, Canada.
authors.forename: Jean-Philippe
authors.initials: JP
authors.lastname: Pialasse
authors.affiliation: Département des sciences de l'activité physique, Université du Québec à Trois-Rivières, Trois-Rivières, QC, Canada.
authors.forename: Martin
authors.initials: M
authors.lastname: Descarreaux
authors.affiliation: Clinique d'Orthopédie Infantile de Québec, Québec, QC, Canada.
authors.forename: Pierre
authors.initials: P
authors.lastname: Mercier
authors.affiliation: Laboratoire de neurosciences cognitives, FR 3C 3512, CNRS-Aix-Marseille Université, Marseille, France.
authors.forename: Jean
authors.initials: J
authors.lastname: Blouin
authors.affiliation: Faculté de médecine, Département de kinésiologie, Université Laval, Québec, QC, Canada.|Centre de recherche du CHU de Québec, Québec, QC, Canada.
authors.forename: Martin
authors.initials: M
authors.lastname: Simoneau
mesh_terms: D000293:Adolescent; D001696:Biomechanical Phenomena; D016022:Case-Control Studies; D002648:Child; D004558:Electric Stimulation; D019054:Evoked Potentials, Motor; D056228:Feedback, Sensory; D005260:Female; D006801:Humans; D008297:Male; D004856:Postural Balance; D011187:Posture; D012600:Scoliosis / Q000473:pathology / Q000503:physiopathology*; D013131:Spine / Q000473:pathology / Q000503:physiopathology*; D014722:Vestibule, Labyrinth / Q000473:pathology / Q000503:physiopathology*