Postural control systems in two different functional movements: a comparison of subjects with and without chronic ankle instability

Abstract

[Purpose] The aim of this study was to evaluate postural control during two different movements of the Functional Movement Screen in patients with chronic ankle instability compared with healthy subjects. [Subjects] This study was a cross-sectional survey of 50 participants comprised of 25 chronic ankle instability patients and 25 healthy subjects. [Methods] All subjects were subjected to measurement of the Foot and Ankle Disability Index and center of pressure and Functional Movement Screen testing. The deep squat and hurdle step were performed for the lower extremities in Functional Movement Screen testing. Then, the center of pressure was measured with balance assessment software using a Nintendo Wii Balance Board. The center of pressure path length, velocity, and area of the 95% confidence ellipse and Functional Movement Screen scores were evaluated for all subjects. [Results] The results showed significant differences in center of pressure path length, velocity, and area of the 95% confidence ellipse between the groups for the hurdle step with the non-affected limb. However, there were no significant differences between groups for the deep squat and hurdle step with the affected limb. [Conclusion] The results of this study showed that there was a difference in the hurdle step with the non-affected limb in chronic ankle instability patients compared with normal subjects.

Correlation between Mechanical Properties of the Ankle Muscles and Postural Sway during the Menstrual Cycle

“…Balance is maintained when the center of pressure (CoP) stays within the support base (Choi and Shin 2016). The vertical projection of the center of mass within their base of support should be kept when standing to maintain balance, resulting in little medial-lateral or anterior-posterior sway (Inanir et al 2014).…”