Activation of human arm muscles during flexion/extension and supination/pronation tasks: A theory on muscle coordination
Activation of human arm muscles during flexion/extension and supination/pronation tasks: A theory on muscle coordination
复制标题
屈曲/伸展和旋后/旋前任务期间人体手臂肌肉的激活：肌肉协调理论
作者：
H. Jongen;J. J. D. Gon;C. Gielen
一般来说，在关节上活动的肌肉数量超过了关节的自由度。这种冗余引发了一个关于这些肌肉在特定运动任务中被激活的比例的问题。在本文中，我们提出了一个理论来解释在自愿和反射诱导收缩期间使用的肌肉激活模式。该理论的基本假设是：1)肌肉的协调是基于协同的肌肉活动；2)所涉及的协同作用满足肌肉主轴信号到肌肉激活信号的一定转换；3)在拉伸肌肉时，肌肉主轴输出与肌肉拉伸和肌肉长度之比成正比；在缩短肌肉时，肌肉主轴输出为零。该理论被用于预测六块手臂肌肉在自主等距收缩时运动单元的招募阈值。所有的理论预测都与实验观察到的每块肌肉内大量运动单元的行为有合理的一致性。然而，在单个肌肉中，有时发现运动单位群体具有不同类型的招募行为。这种偏离行为是根据这里提出的理论来讨论的。
Generally the number of muscles acting across a joint exceeds the number of degrees of freedom available to the joint. This redundancy raises a problem regarding the ratio in which these muscles are activated during a particular motor task. In this paper we present a theory to explain the activation patterns of muscles used during voluntary and reflex induced contractions. The basic assumptions underlying the theory are that 1) coordination of muscles is based on synergistic muscle activities, 2) the synergisms involved satisfy certain transformations of muscle spindle signals to muscle activation signals and 3) muscle spindle output is proportional to the ratio of muscle stretch and muscle length in lengthening muscles, and is zero in shortening muscles. The theory is used to predict the recruitment threshold of motor units in six arm muscles during voluntary isometric contractions. All theoretical predictions are in reasonable agreement with the experimentally observed behavior of a large population of motor units within each muscle. However, within a single muscle sometimes motor-unit populations have been found to have different types of recruitment behavior. This deviating behavior is discussed in the light of the theory presented here.
协调：过完备 CNS 坐标变换的向量矩阵描述和使用 Moore-Penrose 广义逆的张量解。
影响因子：
2
作者：
Pellionisz,AJ
通讯作者：
Pellionisz,AJ
影响因子：
2.5
作者：
BUCHANAN, TS;ALMDALE, DPJ;RYMER, WZ
通讯作者：
RYMER, WZ
影响因子：
2.4
作者：
AN, KN;HUI, FC;CHAO, EY
通讯作者：
CHAO, EY