A model-based study of passive joint properties on muscle effort during static stance.
A model-based study of passive joint properties on muscle effort during static stance.
复制标题
基于模型的静态站立期间被动关节特性对肌肉作用力的研究。
DOI：
10.1016/j.jbiomech.2005.07.012
复制
发表时间：
2006
影响因子：
2.4
通讯作者：
Audu,Musa
中科院分区：
文献类型：
--
作者：
Amankwah,Kofi;Triolo,Ronald;Kirsch,Robert;Audu,Musa
本研究探讨了下肢关节僵硬和模拟关节挛缩对脊髓损伤（SCI）后维持静态站立姿势所需的肌肉力量的影响。静态逆计算机模拟进行了三维15自由度的肌肉骨骼模型放置在1600个不同的站立姿势。通过优化程序计算所需的下肢肌肉力量，使肌肉应力平方和最小化，并将其用作每个站立姿势所需的肌肉努力指数。关节刚度增加和减少了100%的标称值，并模拟挛缩，以确定其对肌肉的努力，为每一个姿势的影响。名义上的肌肉和被动特性的一个人与SCI确定基线肌肉的努力进行比较。踝关节跖屈/背屈、髋关节屈曲/伸展和髋关节外展/内收方向的刚度变化对减少肌肉努力的影响最大，超过5%，而踝关节内翻/外翻和膝关节屈曲/伸展方向的变化影响最小。对于直立站立，当踝关节跖屈/背屈关节或髋关节屈曲/伸展关节的刚度降低时，肌肉努力减少了5%以上。在模拟关节挛缩的情况下，姿势工作区面积减少，肌肉努力在任何姿势下都不会减少5%以上。利用这些知识，可以通过使用矫形器、物理治疗、手术或其他手段来开发方法，以在使用神经假体站立期间适当地增加或减少这些被动力矩。
This study examined the impact of lower extremity joint stiffnesses and simulated joint contractures on the muscle effort required to maintain static standing postures after a spinal cord injury (SCI). Static inverse computer simulations were performed with a three-dimensional 15 degree of freedom musculoskeletal model placed in 1600 different standing postures. The required lower extremity muscle forces were calculated through an optimization routine that minimized the sum of the muscle stresses squared, which was used as an index of the muscle effort required for each standing posture. Joint stiffnesses were increased and decreased by 100 percent of their nominal values, and contractures were simulated to determine their effects on the muscle effort for each posture. Nominal muscle and passive properties for an individual with a SCI determined the baseline muscle effort for comparisons. Stiffness changes for the ankle plantar flexion/dorsiflexion, hip flexion/extension, and hip abduction/adduction directions had the largest effect on reducing muscle effort by more than 5 percent, while changes in ankle inversion/eversion and knee flexion/extension had the least effect. For erect standing, muscle effort was reduced by more than 5 percent when stiffness was decreased at the ankle plantar flexion/dorsiflexion joint or hip flexion/extension joint. With simulated joint contractures, the postural workspace area decreased and muscle effort was not reduced by more than 5 percent for any posture. Using this knowledge, methods can be developed through the use of orthoses, physical therapy, surgery or other means to appropriately augment or diminish these passive moments during standing with a neuroprosthesis.
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影响因子：
2.4
作者：
BRAND, RA;PEDERSEN, DR;FRIEDERICH, JA
通讯作者：
FRIEDERICH, JA
使用人体肌肉骨骼模型为站立神经假体选择最佳肌肉组
DOI：
10.1109/iembs.2003.1279645
发表时间：
2003
期刊：
Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439)
影响因子：
--
作者：
B. Heilman;R. Kirsch
通讯作者：
R. Kirsch
确定人体双足姿态地面反作用力的计算技术
DOI：
--
发表时间：
2003
期刊：
影响因子：
--
作者：
M. Audu;R. Kirsch;R. Triolo
通讯作者：
R. Triolo
影响因子：
--
作者：
F. Zajac
通讯作者：
F. Zajac
站立时有或没有关节挛缩时的踝关节、膝关节和髋关节力矩 功能性电刺激的模拟研究
影响因子：
3
作者：
H. Kagaya;Mukut Sharma;R. Kobetic;E. Marsolais
通讯作者：
E. Marsolais