A 3D model of the Achilles tendon to determine the mechanisms underlying nonuniform tendon displacements.
A 3D model of the Achilles tendon to determine the mechanisms underlying nonuniform tendon displacements.
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DOI：
10.1016/j.jbiomech.2016.11.062
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发表时间：
2017-01-25
影响因子：
2.4
通讯作者：
Blemker SS
中科院分区：
文献类型：
--
作者：
Handsfield GG;Inouye JM;Slane LC;Thelen DG;Miller GW;Blemker SS
跟腱是人体中最粗的肌腱，是跑步过程中主要的弹性储能部件。人类阿基里斯的形态和功能是复杂的：扭曲的结构、腱内的相互作用以及小腿三头肌的不同运动控制使阿基里斯的行为难以凭直觉感知。最近在体内的跟腱成像显示不均匀的位移模式，并没有完全理解，可能会导致复杂的架构和肌肉肌腱的相互作用。为了了解跟腱的哪些特征会导致在体内观察到的不均匀变形，我们使用计算建模来预测肌腱不同特征的力学贡献。本研究的目的是：（i）建立一个新的计算模型的跟腱的基础上超短回波时间MRI，（ii）比较模拟位移与发表的在体内超声测量位移，和（iii）使用该模型来阐明肌腱扭曲，肌腱内滑动，跟骨后插入，和肌腱变形的肌肉力量差的影响。肌腱内滑动和不同的肌肉力量被认为是最大的因素，肌腱区域之间的位移不均匀性。消除肌腱内滑动或肌肉力量分别减少了96%和85%的位移不均匀性，而消除肌腱扭曲和跟骨后插入减少位移不均匀性只有35%和3%。这些结果表明，肌腱复杂内部结构的变化改变了肌肉力量和肌腱行为之间的相互作用，因此可能对运动过程中的肌肉功能有重要影响。
The Achilles is the thickest tendon in the body and is the primary elastic energy-storing component during running. The form and function of the human Achilles is complex: twisted structure, intratendinous interactions, and differential motor control from the triceps surae muscles make Achilles behavior difficult to intuit. Recent in vivo imaging of the Achilles has revealed nonuniform displacement patterns that are not fully understood and may result from complex architecture and musculotendon interactions. In order to understand which features of the Achilles tendon give rise to the nonuniform deformations observed in vivo, we used computational modeling to predict the mechanical contributions from different features of the tendon. The aims of this study are to: (i) build a novel computational model of the Achilles tendon based on ultrashort echo time MRI, (ii) compare simulated displacements with published in vivo ultrasound measures of displacement, and (iii) use the model to elucidate the effects of tendon twisting, intratendon sliding, retrocalcaneal insertion, and differential muscle forces on tendon deformation. Intratendon sliding and differential muscle forces were found to be the largest factors contributing to displacement nonuniformity between tendon regions. Elimination of intratendon sliding or muscle forces reduced displacement nonuniformity by 96% and 85%, respectively, while elimination of tendon twist and the retrocalcaneal insertion reduced displacement nonuniformity by only 35% and 3%. These results suggest that changes in the complex internal structure of the tendon alter the interaction between muscle forces and tendon behavior and therefore may have important implications on muscle function during movement.
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DOI：
10.1097/00005768-200003000-00012
发表时间：
2000-03-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
--
作者：
Giddings, VL;Beaupré, GS;Carter, DR
通讯作者：
Carter, DR
影响因子：
2.8
作者：
Lichtwark, G. A.;Wilson, A. M.
通讯作者：
Wilson, A. M.
影响因子：
2.4
作者：
Milz, S;Rufai, A;Benjamin, M
通讯作者：
Benjamin, M
影响因子：
64.8
作者：
ALEXANDER, RM;BENNETCLARK, HC
通讯作者：
BENNETCLARK, HC
影响因子：
5.5
作者：
GRIFFITHS, RI
通讯作者：
GRIFFITHS, RI