Validation of a lower limb model with in vivo femoral forces telemetered from two subjects.
Validation of a lower limb model with in vivo femoral forces telemetered from two subjects.
复制标题
使用两名受试者遥测的体内股骨力验证下肢模型。
DOI：
10.1016/s0021-9290(97)00102-4
复制
发表时间：
1997
影响因子：
2.4
通讯作者：
Peter Walker
中科院分区：
文献类型：
--
作者：
T. Lu;J. O'Connor;S. Taylor;Peter Walker
在矢状面中的人骨盆-腿系统的数学模型，与膝关节的解剖模型，被开发用于计算由系统的结构元件传递的力。该模型被用来研究在等长运动和水平行走时，髋关节屈伸肌的活动对股骨中的力的影响。获得了两名植入内固定大块股骨近端假体的患者的运动学和动力学数据以及同步肌电图（EMG）和体内沿假体传递的沿着轴向力。模型股骨中计算的轴向力水平与同时遥测的力水平的比较表明，等长试验具有良好的一致性。在等长测试过程中肌肉和骨骼之间的相互作用进行了检查，双关节肌肉被证明在调节骨骼中的力中起着重要作用。这项研究支持了这一假设，即肌肉平衡四肢的外部力矩，不仅在关节，而且沿着四肢，减少弯曲力矩，但增加骨骼的轴向压力。因此，在离体实验和骨载荷传递的理论研究中，适当地模拟肌肉力是必要的。矢状面模型低估了行走过程中股骨的最大轴向力值约30%，但表明70%是由于伸肌或屈肌的作用。结果鼓励进一步发展的三维模型与解剖模型的关节，包括冠状面和横向平面的研究内收肌和外展肌。
A mathematical model of the human pelvis–leg system in the sagittal plane, with an anatomical model of the knee, was developed to calculate forces transmitted by the structural elements of the system. The model was used to study the influence of activity of hip flexors and extensors on the forces in the femur during isometric exercises and during level walking. Kinematic and kinetic data together with simultaneous electromyography (EMG) and in vivo axial forces transmitted along the prostheses from two patients implanted with instrumented massive proximal femoral prostheses were obtained. Comparison of the levels of the calculated axial forces in the model femur to the simultaneous telemetered forces showed good agreement for isometric tests. Interaction between the muscles and the bones during isometric tests was examined and bi-articular muscles were shown to play a major role in modulating forces in bones. The study supports the hypothesis that muscles balance the external limb moments, not only at joints but also along the limbs, decreasing the bending moments but increasing the axial compressive forces in bones. It is thus suggested that appropriate simulation of muscle force is necessary in in vitro laboratory experiments and in theoretical studies of load transmission in bones. The sagittal plane model underestimates the value of the maximum axial force in the femur during walking by about 30% but suggests that 70% was due to the action of the extensors or flexors. The results encourage further development of a three-dimensional model with anatomical models of the joints to include coronal and transverse planes for the study of adductors and abductors.
使用线性和非线性编程直接比较肌肉力量预测。
DOI：
10.1115/1.3138669
发表时间：
1987
期刊：
Journal of biomechanical engineering
影响因子：
--
作者：
Pedersen,DR;Brand,RA;Cheng,C;Arora,JS
通讯作者：
Arora,JS
影响因子：
2.4
作者：
PANDY, MG;ZAJAC, FE;LEVINE, WS
通讯作者：
LEVINE, WS
DOI：
10.1115/1.3138363
发表时间：
1982-01-01
影响因子：
1.7
作者：
BRAND, RA;CROWNINSHIELD, RD;VANKRIEKEN, FM
通讯作者：
VANKRIEKEN, FM