Muscle contributions to whole-body sagittal plane angular momentum during walking.
Muscle contributions to whole-body sagittal plane angular momentum during walking.
复制标题
DOI：
10.1016/j.jbiomech.2010.08.015
复制
发表时间：
2011-01-04
影响因子：
2.4
通讯作者：
McGowan, C. P.
中科院分区：
文献类型：
--
作者：
Neptune, R. R.;McGowan, C. P.
行走是一项复杂的动态任务，需要调节全身角动量以保持动态平衡，同时执行行走子任务，例如推动身体向前和加速腿部摆动。在人类行走中，调节角动量的主要机制是肌肉力量的产生。肌肉加速身体各节并产生地面反作用力，改变身体质心的角动量，以恢复和维持动态稳定性。此外，重力通过对地面反作用力的贡献而对全身角动量做出贡献。本研究的目的是生成正常行走的肌肉驱动的前向动力学模拟，以量化个体肌肉和重力如何影响矢状面中的全身角动量。在站立早期，单关节髋关节和膝关节伸肌（GMAX、VAS）、双关节腘绳肌（HAM）和踝背屈肌（TA）产生向后的角动量，而踝关节跖屈肌（SOL、GAS）产生向前的动量。在后期姿势中，SOL 和 GAS 是主要贡献者并产生相反方向的角动量。 SOL 主要产生前向角动量，而 GAS 产生后向角动量。肌肉之间的差异是由于它们对水平和垂直地面反作用力的相对贡献所致。重力在早期站立时对身体的角动量有贡献，在站立后期则有较小程度的影响，这主要由跖屈肌抵消。这些结果可以提供对平衡和运动障碍的深入了解，并为开发针对特定肌肉群的运动疗法提供基础。
Walking is a complex dynamic task that requires the regulation of whole-body angular momentum to maintain dynamic balance while performing walking subtasks such as propelling the body forward and accelerating the leg into swing. In human walking, the primary mechanism to regulate angular momentum is muscle force generation. Muscles accelerate body segments and generate ground reaction forces that alter angular momentum about the body’s center-of-mass to restore and maintain dynamic stability. In addition, gravity contributes to whole-body angular momentum through its contribution to the ground reaction forces. The purpose of this study was to generate a muscle-actuated forward dynamics simulation of normal walking to quantify how individual muscles and gravity contribute to whole-body angular momentum in the sagittal plane. In early stance, the uniarticular hip and knee extensors (GMAX, VAS), biarticular hamstrings (HAM) and ankle dorsiflexors (TA) generated backward angular momentum while the ankle plantar flexors (SOL, GAS) generated forward momentum. In late stance, SOL and GAS where the primary contributors and generated angular momentum in opposite directions. SOL generated primarily forward angular momentum while GAS generated backward angular momentum. The difference between muscles was due to their relative contributions to the horizontal and vertical ground reaction forces. Gravity contributed to the body’s angular momentum in early stance and to a lesser extent in late stance, which was counteracted primarily by the plantar flexors. These results may provide insight into balance and movement disorders and provide a basis for developing locomotor therapies that target specific muscle groups.
登录
查看更多内容
影响因子：
2.4
作者：
Runge, CF;Shupert, CL;Zajac, FE
通讯作者：
Zajac, FE
影响因子：
2.4
作者：
Pijnappels, M;Bobbert, MF;van Dieën, JH
通讯作者：
van Dieën, JH
DOI：
10.1109/86.650289
发表时间：
1997-12-01
期刊：
IEEE transactions on rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society
影响因子：
--
作者：
Riley, P O;Krebs, D E;Popat, R A
通讯作者：
Popat, R A
DOI：
10.1098/rspb.2009.0664
发表时间：
2009-10-22
影响因子：
4.7
作者：
Collins, Steven H.;Adamczyk, Peter G.;Kuo, Arthur D.
通讯作者：
Kuo, Arthur D.
影响因子：
3.3
作者：
McGowan, C. P.;Neptune, R. R.;Kram, R.
通讯作者：
Kram, R.