Balance control strategies during perturbed and unperturbed balance in standing and handstand
Balance control strategies during perturbed and unperturbed balance in standing and handstand
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DOI：
10.1098/rsos.161018
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发表时间：
2017-07-01
影响因子：
3.5
通讯作者：
Hiley, Michael J.
中科院分区：
文献类型：
--
作者：
Blenkinsop, Glen M.;Pain, Matthew T. G.;Hiley, Michael J.
通过评估站立和倒立姿势中的扰动和未扰动平衡，研究了对平衡感觉运动控制的见解。在站立时的扰动和未扰动平衡中，最普遍的控制策略是踝关节策略，超过90%的时间都采用该策略。在手倒立的扰动和无扰动平衡过程中，最普遍的控制策略是手腕策略，超过75%的时间用于平衡。在这两种姿势中，这些策略可以被描述为单段倒立摆控制策略，其中多段系统由围绕最下关节的扭矩控制，其中围绕所有上级关节的补偿扭矩沿相同方向作用以保持上级段之间的固定取向。与以前的文献相比，令人惊讶的是，在混合策略中花费的时间很少，站立平衡时间不到1%，倒立平衡时间约为2%。研究结果表明，虽然中枢神经系统在试验过程中可能会采用多种控制策略，但这些策略是单独使用的，而不是同时使用的。
Insights into sensorimotor control of balance were examined by the assessment of perturbed and unperturbed balance in standing and handstand postures. During perturbed and unperturbed balance in standing, the most prevalent control strategy was an ankle strategy, which was employed for more than 90% of the time in balance. During perturbed and unperturbed balance in handstand, the most prevalent control strategy was a wrist strategy, which was employed for more than 75% of the time in balance. In both postures, these strategies may be described as a single segment inverted pendulum control strategy, where the multi-segment system is controlled by torque about the most inferior joint with compensatory torques about all superior joints acting in the same direction to maintain a fixed orientation between superior segments. In contrast to previous literature, surprisingly little time was spent in a mixed strategy, representing less than 1% of time in standing balance and approximately 2% of time in handstand balance. Findings indicate that although the central nervous system may employ a number of control strategies during a trial, these strategies are employed individually rather than simultaneously.