The Vestibular-Evoked Postural Response of Chinese Adolescents with Idiopathic Scoliosis
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AbstractIntroduction: Results from recent studies suggest sensorimotor control of about 40% of North-American patients with
idiopathic scoliosis is altered compared with normal controls when tested with galvanic vestibular stimulation (GVS).
This study aimed to determine if similar observations are encountered in a Chinese population of patients with scoliosis.

Methods: A total of 36 adolescents with or without idiopathic scoliosis had their sensorimotor control evaluated. During trials, participants were standing with eyes closed, each foot on a force platform and kinematic marker was placed at the 7th cervical vertebra (C7). Each trial was divided into 4 intervals: 2 seconds pre-GVS, 2 seconds of GVS, 1 second post-GVS, and further 2 seconds. The polarity of the 24 GVSs was alternated. Analysis of variance with repeated measures were used to study the effect of direction of GVS, group, and interval.

Results: The mean (± standard deviation) induced movement of 0.3 ± 0.27 cm/m observed in control participants were similar to what was reported previously. For C7 movement (F[3,102]=13.8, p<0.001) and vertical forces (F[3,102]=10.2, p<0.001), an effect of the stimulation was observed. Post-hoc analysis showed that GVS did effectively influence the balance in 3 last intervals when compared with pre-GVS. No side or group effect were observed. We found 2 patients with adolescent idiopathic scoliosis (AIS) had larger reaction to GVS.

Conclusion: It is well known that AIS is a multifactorial pathology. The current sample might underrepresent sensorimotor causes, or the North American one did overrepresented it with 42%. Further investigation is necessary to better understand the role of vestibular system in AIS.
All Author(s) ListJ. P. Pialasse, S. C. N. Hui, J. C. Y. Cheng and W. C. W. Chu
Name of ConferenceThe 36th Annual Congress of the Hong Kong Orthopaedic Association (HKOA)
Start Date of Conference05/11/2016
End Date of Conference06/11/2016
Place of ConferenceHong Kong
Country/Region of ConferenceHong Kong
LanguagesEnglish-United Kingdom

Last updated on 2018-22-01 at 09:15