Three-dimensional modular control of human walking.
Three-dimensional modular control of human walking.
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DOI：
10.1016/j.jbiomech.2012.05.037
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发表时间：
2012-08-09
影响因子：
2.4
通讯作者：
Neptune RR
中科院分区：
文献类型：
--
作者：
Allen JL;Neptune RR
最近的研究表明，行走过程中复杂的肌肉活动可能是通过一种减少的神经控制策略来控制的，这种策略是围绕多个肌肉或模块的共同兴奋来组织的。先前的计算机仿真研究表明，有五个模块可以满足二维行走的矢状面生物力学子任务。目前的研究表明，需要第六个模块，它主要有助于中外侧平衡控制和对侧腿摆动，以满足3D行走的额外非矢状面需求。早期站立时由模块1（髋关节和膝关节伸肌、髋关节外展肌）提供身体支撑，后期站立时由模块2（跖屈肌）提供身体支撑。在早期的立姿中，模块4（腿筋）提供向前推进，但净制动是由模块1和模块2提供的。模块2以后期姿态提供向前推进。模块1在整个站姿中加速身体内侧，主要是模块4和模块6（大收肌）提供的站姿早期和模块2提供的站姿后期的侧向加速，除了离球前。模块3（踝关节背屈肌、股直肌）和模块5（髋屈肌和大收肌以外的内收肌）在摆动早期加速同侧腿向前，而模块4在脚跟撞击前减速同侧腿。最后，模块1、4和6在对侧摆动之前和期间加速对侧腿向前。由于这些模块是基于实验测量的肌肉活动，这些结果提供了进一步的证据，表明一种简单的神经控制策略，包括围绕特定任务的生物力学功能组织的肌肉激活模块，可以用来控制复杂的人类运动。
Recent studies have suggested that complex muscle activity during walking may be controlled using a reduced neural control strategy organized around the co-excitation of multiple muscles, or modules. Previous computer simulation studies have shown that five modules satisfy the sagittal-plane biomechanical sub-tasks of 2D walking. The present study shows that a sixth module, which contributes primarily to mediolateral balance control and contralateral leg swing, is needed to satisfy the additional non-sagittal plane demands of 3D walking. Body support was provided by Module 1 (hip and knee extensors, hip abductors) in early stance and Module 2 (plantarflexors) in late stance. In early stance, forward propulsion was provided by Module 4 (hamstrings), but net braking occurred due to Modules 1 and 2. Forward propulsion was provided by Module 2 in late stance. Module 1 accelerated the body medially throughout stance, dominating the lateral acceleration in early stance provided by Modules 4 and 6 (adductor magnus) and in late stance by Module 2, except near toe-off. Modules 3 (ankle dorsiflexors, rectus femoris) and 5 (hip flexors and adductors except adductor magnus) accelerated the ipsilateral leg forward in early swing whereas Module 4 decelerated the ipsilateral leg prior to heel-strike. Finally, Modules 1, 4 and 6 accelerated the contralateral leg forward prior to and during contralateral swing. Since the modules were based on experimentally measured muscle activity, these results provide further evidence that a simple neural control strategy involving muscle activation modules organized around task-specific biomechanical functions may be used to control complex human movements.
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影响因子：
2.4
作者：
Menegaldo, LL;Fleury, ADT;Weber, HI
通讯作者：
Weber, HI
影响因子：
2.4
作者：
Peterson, Carrie L.;Hall, Allison L.;Neptune, Richard R.
通讯作者：
Neptune, Richard R.
影响因子：
2.4
作者：
Pandy, Marcus G.;Lin, Yi-Chung;Kim, Hyung Joo
通讯作者：
Kim, Hyung Joo
影响因子：
5.5
作者：
Ivanenko, YP;Poppele, RE;Lacquaniti, F
通讯作者：
Lacquaniti, F
影响因子：
1.8
作者：
Hall, A. L.;Peterson, C. L.;Neptune, R. R.
通讯作者：
Neptune, R. R.