Abstract
[Purpose] The purpose of this study was to investigate the characteristics of quiet standing control using cross-correlation analysis of the center of foot pressure and the center of mass sway. [Subjects] Twenty elderly individuals participated in this study. [Methods] Using a 3D motion analysis system, we created segment models of the head, thoracic, and pelvic regions. The 3D system was used to measure the center of mass sway of the body and of each segment, as well as the center of foot pressure sway on a force plate. [Results] The results revealed that the correlation coefficient peak value of the center of mass of the head and the center of foot pressure showed a significantly lower value than the center of mass of the body in the mediolateral direction. [Conclusion] The results of this study indicate that the center of mass sway of the head in the mediolateral direction has a low association with the center of foot pressure sway; therefore, the center of mass sway of the other body segments of elderly individual during quiet standings is possibly controlled independently.
