How do non-muscular torques contribute to the kinetics of postural recovery following a support surface translation?
How do non-muscular torques contribute to the kinetics of postural recovery following a support surface translation?
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非肌肉扭矩如何影响支撑表面平移后的姿势恢复动力学？
DOI：
10.1016/s0021-9290(00)00161-5
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发表时间：
2001
影响因子：
2.4
通讯作者：
Jensen,JL
中科院分区：
文献类型：
--
作者：
Bothner,KE;Jensen,JL
在平衡控制研究中使用的共同平台平移范例采用了一种干扰事件，该干扰事件在干扰持续时间内向身体施加非肌肉力。先前的研究已经探索了通过将这些扰动视为触发事件而不是具有持续的力施加时间轴的事件来构建平衡恢复的过程。本研究的目的是量化的影响，肌肉和非肌肉扭矩扰动后的平衡，特别感兴趣的外部扰动的平衡恢复的作用。五个年轻的成年男性经历了三个不同的速度的支持表面向后平移。为每个段定义积分间隔，并计算角动量增加（不稳定）和角动量减少（重新稳定）的时间段的角冲量。远端节段失稳主要是由于支撑表面运动产生的脉冲。然而，对于躯干，肌肉和运动依赖性来源对增加动量的贡献最大。通过肌肉和平台脉冲实现远端节段的再稳定，而通过肌肉和运动依赖性条款实现躯干的再稳定，以对抗重力。增加平台速度导致增加肌肉的贡献，只有在控制的躯干，而对远端肌肉组织的需求随着平台速度的变化而下降，因为平台的贡献，以重新稳定增加，在这些部分。因此，来自非肌肉源的脉冲，包括扰动本身，是对平衡干扰的反应的重要修改器，并且必须在平衡研究中考虑。
The common platform translation paradigm used in balance control studies employs a disturbance event that applies non-muscular forces to the body for the duration of the disturbance. Previous research has explored the process of constructing the balance recovery by considering these perturbations to be trigger events, not events with an ongoing force application timeline. The purpose of this study was to quantify the effect of muscular and non-muscular torques on post-perturbation balance with particular interest in the role of the external perturbation in balance recovery. Five young adult males experienced backward translations of the support surface at three different speeds. Integration intervals were defined for each segment and angular impulses were calculated for a period of increasing angular momentum (destabilization), and a period of decreasing angular momentum (restabilization). Destabilization of distal segments was primarily due to impulse generated by the motion of the support surface. For the trunk, however, muscle and motion-dependent sources contributed most to increasing momentum. Restabilization of distal segments was achieved by muscle and platform impulses while trunk restabilization was achieved by muscle and motion-dependent terms in opposition to gravity. Increased platform speed resulted in increased muscular contribution only in the control of the trunk, while demand on distal musculature decreased with change in platform speed as the platform contribution to restabilization increased in these segments. Therefore, impulses from non-muscular sources, including the perturbation itself, are significant modifiers of the response to balance disturbances and must be accounted for in balance research.
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影响因子：
2.4
作者：
Runge, CF;Shupert, CL;Zajac, FE
通讯作者：
Zajac, FE
爪子抖动反应期间膝盖和脚踝处的惯性和肌肉力矩的对比作用。
影响因子：
2.5
作者：
Hoy,MG;Zernicke,RF;Smith,JL
通讯作者：
Smith,JL
DOI：
--
发表时间：
1974
期刊：
Journal of Physiology
影响因子：
--
作者：
J. M. Brookhart;R. E. Talbott
通讯作者：
R. E. Talbott
影响因子：
--
作者：
J. M. Brookhart;S. Mori;P. J. Reynolds
通讯作者：
P. J. Reynolds
影响因子：
2.5
作者：
MCILROY, WE;MAKI, BE
通讯作者：
MAKI, BE