Muscle recruitment and coordination with an ankle exoskeleton.
Muscle recruitment and coordination with an ankle exoskeleton.
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DOI：
10.1016/j.jbiomech.2017.05.010
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发表时间：
2017-07-05
影响因子：
2.4
通讯作者：
Collins SH
中科院分区：
文献类型：
--
作者：
Steele KM;Jackson RW;Shuman BR;Collins SH
外骨骼有可能帮助和增强人类的表现。了解用户如何适应他们的运动和神经肌肉控制，以响应外部援助是很重要的通知这些设备的设计。本研究的目的是评估10个未受损的人与踝关节外骨骼行走的肌肉招募和协调的变化。我们评估了随着外骨骼工作和扭矩的增加，个体肌肉活动、共收缩水平和肌肉协调的协同模式的变化。参与者能够选择性地减少踝跖屈肌的活动，增加外骨骼的援助。增加外骨骼网络工作导致肌肉活动比增加外骨骼扭矩更大的减少。肌肉协调的模式不受限制或约束的协同模式观察到在无辅助行走。虽然三种协同作用可以描述无辅助行走期间肌电图数据的近95%的变化，但这些相同的协同作用只能描述使用外骨骼行走时肌肉活动的85-90%的变化。用外骨骼计算的协同证明了随着外骨骼工作的增加协同权重的更大变化，而随着外骨骼扭矩的增加协同激活的更大变化。这些结果支持了这样一种理论，即未受损的个体并不完全使用中央模式发生器或其他低级构建块来协调肌肉活动，特别是在学习新任务或适应外部帮助时，并证明了使用外骨骼来调节肌肉招募和协调模式以进行康复或表现的潜力。
Exoskeletons have the potential to assist and augment human performance. Understanding how users adapt their movement and neuromuscular control in response to external assistance is important to inform the design of these devices. The aim of this research was to evaluate changes in muscle recruitment and coordination for ten unimpaired individuals walking with an ankle exoskeleton. We evaluated changes in the activity of individual muscles, cocontraction levels, and synergistic patterns of muscle coordination with increasing exoskeleton work and torque. Participants were able to selectively reduce activity of the ankle plantarflexors with increasing exoskeleton assistance. Increasing exoskeleton net work resulted in greater reductions in muscle activity than increasing exoskeleton torque. Patterns of muscle coordination were not restricted or constrained to synergistic patterns observed during unassisted walking. While three synergies could describe nearly 95% of the variance in electromyography data during unassisted walking, these same synergies could describe only 85-90% of the variance in muscle activity while walking with the exoskeleton. Synergies calculated with the exoskeleton demonstrated greater changes in synergy weights with increasing exoskeleton work versus greater changes in synergy activations with increasing exoskeleton torque. These results support the theory that unimpaired individuals do not exclusively use central pattern generators or other low-level building blocks to coordinate muscle activity, especially when learning a new task or adapting to external assistance, and demonstrate the potential for using exoskeletons to modulate muscle recruitment and coordination patterns for rehabilitation or performance.
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使用未经动荡的外骨骼降低人行走的能源成本。
影响因子：
64.8
作者：
Collins, Steven H.;Wiggin, M. Bruce;Sawicki, Gregory S.
通讯作者：
Sawicki, Gregory S.
DOI：
10.1523/jneurosci.6344-11.2012
发表时间：
2012-08-29
期刊：
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子：
--
作者：
Chvatal SA;Ting LH
通讯作者：
Ting LH
影响因子：
3.2
作者：
Gonzalez-Vargas J;Sartori M;Dosen S;Torricelli D;Pons JL;Farina D
通讯作者：
Farina D
影响因子：
1.4
作者：
Ferris, DP;Czerniecki, JM;Hannaford, B
通讯作者：
Hannaford, B
影响因子：
2.4
作者：
Kao, Pei-Chun;Ferris, Daniel P.
通讯作者：
Ferris, Daniel P.