Compliance Control of Leg Joints and Configuration of Leg during Level Walking

主要研究结果如下：(1)软垫和柔性垫有效地降低了脚着地时的冲击力和各关节产生的能量。这种柔软性和柔韧性还改善了老年人的步行特性，并在步行过程中稳定了他们的上半身。(2)建立了股骨近端三维模型，分析了髋关节置换术后股骨的应力分布。从种植体下方的区域到种植体钉的顶端都显示了应力屏蔽和应变。应力屏蔽和应变模式可能导致假体断裂和松动。(3)建立股骨复合模型分析应力分布，将计算机模拟结果与光弹性实验结果进行比较。(4)采用光弹性涂层方法测量膝关节运动过程中前十字韧带的应变。(5)研制了一套激光三维表面测量系统，并应用于人体股骨测量。(6)模型和实验结果表明，在异常行走和治疗性运动过程中，内力的估计对于客观评价病变关节是非常重要的。(7)经颅磁刺激对Prkinson病患者的运动能力的改善是最有效的。(8)将与Mayo诊所康复科和Kurume生物力学会议小组合作开发髋关节力矩复位矫形器。

Main results are summarized as follows :(1) Soft inserts and flexible shows effectively reduced impact force at foot landing and energy generated at each joint. The softness and flexbility also improved walking characteristics of aged persons and stabilized their upper torsos during walking.(2) A three-dimensional model of the proximal femur was developed to analyze the stress distribution of the femur after resurfacing hip arthroplasty. Stress shielding and strains were demonstrated from the area beneath the implant to the top of the implant peg. The stress shielding and the strain pattern may result in fracture and loosening of the implant.(3) Composite model of the femur was developed for analyzing stress distribution in order to compare computer simulation results with experimental results obtained by photoelastic method.(4) Strains of anterior cruciate ligament were thoroughly measured by photoelestic coating method during knee motion. The process of fracture of the ligament was described.(5) A three-dimensional surface measurement system using laser was develop and applied to measure human femur.(6) Model and experimental results showed that estimation of inner forced, during abnormal walking and during therapeutic motion, was important for objextively evaluating diseased joint.(7) Transcranial magnetic stimulation for patients with Prkinson's disease was most effective to improve the performance of motion.(8) Reduction orthosis for hip joint moment will be developed in cooperation with the rehabilitation department in Mayo Clinic and Kurume biomechanics conference group.