The contribution of a central pattern generator in a reflex-based neuromuscular model.

The contribution of a central pattern generator in a reflex-based neuromuscular model.
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DOI:
10.3389/fnhum.2014.00371
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发表时间:
2014
影响因子:
2.9
通讯作者:
Ijspeert A
Ijspeert A
中科院分区:
医学3区
文献类型:
--
作者:
Dzeladini F;van den Kieboom J;Ijspeert A

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尽管脊椎动物中控制运动的中枢模式发生器(CPGs)的概念被广泛接受,但人类运动中是否存在专门的CPGs仍然是一个争论的问题。90年代开发的一个有趣的数值模型证明了CPG在人类运动中的重要作用,无论是在抗扰动的稳定性方面,还是在速度控制方面。最近,一个反射为基础的神经肌肉骨骼模型已被提出,表现出类似于以前的模型,没有任何CPG组件的扰动的稳定性水平。虽然表现出惊人的相似性与人类的步态,缺乏CPG使得控制的速度/步长的模型中的困难。在本文中,我们假设CPG组件将提供一个有意义的方式来控制运动速度。在反射模型中引入CPG分量,并利用其特性,提出了一种简单的步态调制模型。结果突出了CPG作为前馈组件在步态调制方面的优势。
Although the concept of central pattern generators (CPGs) controlling locomotion in vertebrates is widely accepted, the presence of specialized CPGs in human locomotion is still a matter of debate. An interesting numerical model developed in the 90s’ demonstrated the important role CPGs could play in human locomotion, both in terms of stability against perturbations, and in terms of speed control. Recently, a reflex-based neuro-musculo-skeletal model has been proposed, showing a level of stability to perturbations similar to the previous model, without any CPG components. Although exhibiting striking similarities with human gaits, the lack of CPG makes the control of speed/step length in the model difficult. In this paper, we hypothesize that a CPG component will offer a meaningful way of controlling the locomotion speed. After introducing the CPG component in the reflex model, and taking advantage of the resulting properties, a simple model for gait modulation is presented. The results highlight the advantages of a CPG as feedforward component in terms of gait modulation.
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