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- W3110039276 abstract "Joint constraint could limit the available degrees of freedom in a kinematic chain for maintaining postural stability. This study investigated adaptive changes in postural synergy due to bracing of bilateral knee joints, usually thought to have a trifling impact on upright stance. Twenty-four young adults were requested to maintain balance on a stabilometer plate as steadily as possible while wearing a pair of knee orthoses, either unlocked (the non-constraint (NC) condition) or locked to restrict knee motion (the knee constraint (KC) condition). Knee constraint led to a significant increase in the regularity of the stabilometer angular velocity. More than 95% of the variance properties of the joint angular velocities in the lower limb were explained by the first and second principal components (PC1 and PC2), which represented the ankle strategy and the combined knee and hip strategy, respectively. In addition to the increase trend in PC1 regularity, knee constraint enhanced the mutual information of the stabilometer angular velocity and PC1 (MI STBV-PC1 ) but reduced the mutual information of the stabilometer angular velocity and PC2 (MI STBV-PC2 ). The MI STBV-PC1 was also positively correlated to stance steadiness on the stabilometer in the KC condition. In summary, in the knee constraint condition, postural synergy on the stabilometer was reorganized to increase reliance on ankle strategies to maintain equilibrium. In particular, a stable stabilometer stance under knee constraint is associated with a high level of coherent ankle–stabilometer interaction." @default.
- W3110039276 created "2020-12-07" @default.
- W3110039276 creator A5003154472 @default.
- W3110039276 creator A5034441283 @default.
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- W3110039276 date "2020-11-30" @default.
- W3110039276 modified "2023-10-16" @default.
- W3110039276 title "Changes in postural strategy of the lower limb under mechanical knee constraint on an unsteady stance surface" @default.
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- W3110039276 doi "https://doi.org/10.1371/journal.pone.0242790" @default.
- W3110039276 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7703948" @default.
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