Fig. 4From: Sub-sensory vibratory noise augments the physiologic complexity of postural control in older adultsThe effects of sub-sensory foot sole vibrations on the complexity of standing postural sway. The influence of vibration level, within-day testing session and standing visual condition on mediolateral (ML) and anterioposterior (AP) postural sway complexity were tested with 3- way repeated-measures ANOVAs. A significant main effect of vibration level was observed for the ML direction (a). Tukey’s post-hoc testing revealed that complexity was greater when standing with vibrations applied at both 70 and 85 % of vibratory thresholds (B symbols), as compared to the control condition (A symbol). No other model effects or interactions were present. Postural sway complexity in the AP direction was not influenced by vibration level, testing session or visual condition (b). Presented means represent outcomes averaged across within-day testing session and standing visual conditionBack to article page