A unified approach for revealing multiple balance recovery strategies

Kuangyou B. Cheng, Chih Kuo Yeh

研究成果: Article同行評審

10 引文 斯高帕斯(Scopus)

摘要

In human balance recovery, different strategies have been proposed with generally overlooked knee motions but extensive focus on the ankle, hip, and step strategies. It is not well understood whether maintaining balance is regulated at the lower "muscular-articular" level of coordinating segment joints or at a higher level of controlling whole body dynamics. Whether balance control is to minimize joint degrees of freedom (DOF) or utilize all the available DOF also remains unclear. This study aimed to use a realistic musculoskeletal human model to identify multiple balance recovery strategies with a single optimization criterion. Movements were driven by neural excitations (which activated muscle force generation) and were assumed to be symmetric. Balance recoveries were simulated with forward-inclined straight body postures as the initial conditions. When the position of the toes was fixed, balance was regained with virtually straight knees and mixed ankle/hip strategies. Under a severely perturbed condition, use of the forward hop strategy after releasing the fixed-toes constraint indicated spontaneous recruitment or suppression of DOF, which mimicked functions of optimally computed CNS commands in humans. The results also indicated that increase/decrease in the number of DOF depends on the imposed perturbation intensity and movement constraints.

原文English
頁(從 - 到)307-316
頁數10
期刊Human Movement Science
44
DOIs
出版狀態Published - 2015 12月 1

All Science Journal Classification (ASJC) codes

  • 生物物理學
  • 骨科和運動醫學
  • 實驗與認知心理學

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