The role of sensory feedback mechanisms on sway size during rotating bipedal stance

Sway was examined during standing on a rotating platform. Sway increased significantly when standing on a firm rotating platform and increased further if standing on a compliant rotating platform. Medio-lateral (ML) sway was smaller than anterio-posterior (AP) sway when not rotating. When rotating, ML sway increased to similar levels as AP sway. Findings suggested that vestibular feedback is significantly impaired when the body is rotating. Conclusions Sway is increased when standing on a rotating platform, with the greatest increase seen in ML sway, mostly due to impaired vestibular sensory function.