Modeling of multiarticular muscles: importance of inclusion of tendon-pulley interactions in the finger.
Modeling of multiarticular muscles: importance of inclusion of tendon-pulley interactions in the finger.
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DOI：
10.1109/tbme.2009.2019119
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发表时间：
2009-09
期刊：
影响因子：
--
通讯作者：
Kamper DG
中科院分区：
文献类型：
--
作者：
Lee SW;Kamper DG
本研究的目的是探讨力的传输，从一个主要的多关节肌肉的手指，屈趾深（FDP），食指。具体来说，我们研究了流行的力矩臂（MA）关节扭矩技术建模肌肉力量传输是否可以准确地代表手指运动的FDP的影响。采用几何MA值（模型I）的动态手指模型进行了比较，另一个模型，包括现实的肌腱力转换机制，通过滑轮结构和关节反作用力（模型II）。这些模型产生的手指屈曲运动进行了比较，从体内刺激实验中获得的。具有力转换机构的模型（模型II）导致更真实的关节空间协调（即，近端指间关节>掌指关节≥远端指间关节）比基于MA的模型（模型I）与刺激诱发的运动模式的关系更好。此外，滑轮结构和被动关节特性的重要性在模型模拟中得到了证实;改变/消除这些组件显着改变了关节角度的空间协调在所产生的运动。本研究的结果强调了通过各种生物力学组件的力转换的功能重要性，并建议在调查手指运动控制时包括这些组件的重要性，例如用于检查损伤机制或设计康复方案。
The purpose of this study was to examine force transmission from one of the major multiarticular muscles of the finger, flexor digitorum profundus (FDP), to the index finger. Specifically, we examined whether the popular moment arm (MA)–joint torque technique of modeling muscle force transmission can accurately represent the effects of the FDP on finger movement. A dynamic finger model employing geometric MA values (model I) was compared with another model including realistic tendon force transformation mechanisms via pulley structures and joint reaction forces (model II). Finger flexion movements generated by these models were compared with those obtained from in vivo stimulation experiments. The model with the force transformation mechanisms (model II) resulted in more realistic joint spatial coordination (i.e., proximal interphalangeal > metacarpophalangeal ≥ distal interphalangeal) than the MA-based model (model I) in relation to the movement patterns evoked by stimulation. Also, the importance of the pulley structures and passive joint characteristics was confirmed in the model simulation; altering/eliminating these components significantly changed the spatial coordination of the joint angles during the resulting movements. The results of this study emphasize the functional importance of the force transformation through various biomechanical components, and suggest the importance of including these components when investigating finger motor control, such as for examining injury mechanisms or designing rehabilitation protocols.