The Influence of the Way the Muscle Force is Modeled on the Predicted Results Obtained by Solving Indeterminate Problems for a Fast Elbow Flexion
The Influence of the Way the Muscle Force is Modeled on the Predicted Results Obtained by Solving Indeterminate Problems for a Fast Elbow Flexion
复制标题
肌肉力建模方式对解决快速肘部屈曲的不确定问题所获得的预测结果的影响
DOI：
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发表时间：
2003
影响因子：
1.6
通讯作者：
H. Aladjov
中科院分区：
文献类型：
--
作者：
R. Raikova;H. Aladjov
在人体四肢模型中，研究运动控制的一个关键点是肌肉模型。更常见的情况是，肌肉的机械输出被认为是一个肌腱作用力，这是优化任务中的一个设计变量，主要通过静态优化来解决。对于动态条件，肌肉的展开力、长度和收缩速度之间的关系变得重要，流变性肌肉模型可以被纳入优化任务中。在这里，肌肉的激活也可以作为设计变量。最近提出了一种新的肌肉模型[22]。肌肉被认为是具有不同特性的运动单位(MU)的混合物，肌力被计算为MU抽动的总和。这篇论文的目的是比较这三种呈现肌肉力量的方式。采用五块肌肉的平面模型对快速屈肘进行研究。结论：流变学模型适用于当前最大肌力的计算，可作为目标函数中的权重因子。基于MUS的模型对于电机控制的精确研究具有许多优势。这样的肌肉呈现可以解释肌肉的共同收缩以及快和慢小鼠的作用。MUS的激活与机械输出之间的关系更清晰，更接近实际。
A critical point in models of the human limbs when the aim is to investigate the motor control is the muscle model. More often the mechanical output of a muscle is considered as one musculotendon force that is a design variable in optimization tasks solved predominantly by static optimization. For dynamic conditions, the relationship between the developed force, the length and the contraction velocity of a muscle becomes important and rheological muscle models can be incorporated in the optimization tasks. Here the muscle activation can be a design variable as well. Recently a new muscle model was proposed [22]. A muscle is considered as a mixture of motor units (MUs) with different peculiarities and the muscle force is calculated as a sum of the MUs twitches. The aim of the paper is to compare these three ways for presenting the muscle force. Fast elbow flexion is investigated using a planar model with five muscles. It is concluded that the rheological models are suitable for calculation of the current maximal muscle forces that can be used as weight factors in the objective functions. The model based on MUs has many advantages for precise investigations of motor control. Such muscle presentation can explain the muscle co-contraction and the role of the fast and the slow MUs. The relationship between the MUs activation and the mechanical output is more clear and closer to the reality.
影响因子：
2.4
作者：
Lemay, MA;Crago, PE
通讯作者：
Crago, PE
优化标准对不对称举重过程中脊柱力估计的影响。
影响因子：
2.4
作者：
Hughes,RE
通讯作者：
Hughes,RE