Fig. 4From: The quality of turning in Parkinson’s disease: a compensatory strategy to prevent postural instability?Subjects with PD have their body COM and ECOM outside their base of support for longer duration during fast turns. Group means (±SEM) for the % of turning duration in which COM a or ECOM b fall outside the lateral base of support in 90 ° turns and matched speeds. p-value: *:p < 0.05; **:p < 0.01Back to article page