Is sample entropy based entropic half-life and de-trended fluctuation analysis correlated and do they reflect phase regularity of center of pressure measurements?
Entropic half-life (EnHL) is a variable that reflects long range correlation in the COP signal. 1/EnHL negatively correlates with the scaling factor ? of a de-trended fluctuation analysis. EnHL and the scaling factor ? depend on the phase regularity of the COP signal. EnHL and the scaling factor ? reflect information about motor control of balance.
variability balance complexity phase surrogate long-range correlation postural control