A dynamic cadaver model of the stance phase of gait: performance characteristics and kinetic validation
A dynamic cadaver model of the stance phase of gait: performance characteristics and kinetic validation
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DOI：
10.1016/s0268-0033(98)00003-5
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发表时间：
1998-09-01
影响因子：
1.8
通讯作者：
Hamel, AJ
中科院分区：
文献类型：
--
作者：
Sharkey, NA;Hamel, AJ
Objective.本研究旨在评估一种新的动态实验室模型的步态站立相的性能。在该装置中对5只尸体足进行了重复测试。典型的尸体足生物力学研究只是在胫骨上施加静态载荷。本系统的设计是为了更好地模拟在增益过程中脚和角度的变化的体内负载环境。该器械通过再现五块外部足部肌肉的生理动作和胫骨近端的生理运动，模拟胫骨、足部和踝关节从脚跟着地到脚趾离地的行为。为了验证其实用性，尸体步态模拟，同时测量施加的肌肉力量，地面反作用力和足底压力。动态肌肉力量始终在预编程值的10%以内。地面反作用力和足底压力的动态测量结果与健康受试者的测量结果相似。峰值垂直（y）、前后（x）和内外侧（z）力分别为体重的110、18和4%。压缩力在胫骨干达到410%的体重。Relevancecadaver的研究大大提高了我们的正常和病理足功能的理解，但往往受到过度简化的负荷条件。本文所述的装置准确地再现了体内加载环境，并为足部和踝关节功能的研究提供了强大的研究工具。有了这个设备，肌肉骨骼结构可以在类似于他们在生活中经历的生物力学条件下进行详细检查。(C)1998爱思唯尔科技有限公司版权所有。
Objective. This study was undertaken to evaluate the performance of a new dynamic laboratory model of the stance phase of gait.Design. Five cadaver feet were repetitively tested in the apparatus.Background. Typical biomechanical investigations of cadaver feet simply place a static load on the tibia. The present system was designed to better simulate the changing in-vivo loading environment of the foot and angle during gain.Methods. The device mimics the behavior of the tibia, foot, and ankle from heel-strike to toe-off by reproducing the physiologic actions of five extrinsic foot muscles and physiologic motion at the proximal tibia. To verify its utility, cadaver gait simulations were constructed while measuring applied muscle forces, ground reaction forces, and plantar pressures.Results. Dynamic muscle forces were consistently delivered to within 10% of pre-programmed values. Dynamic measurements of ground reaction forces and plantar pressure were similar to those measured in healthy human subjects. Peak vertical (y), fore-aft (x) and medio- lateral (z) forces were 110, 18, and 4% of body weight respectively. Compressive force in the tibial shaft reached 410% of body weight.RelevanceCadaver studies have greatly enhanced our understanding of normal and pathologic foot function, but are often limited by over-simplified loading conditions. The apparatus presented here accurately reproduces the in-vivo loading environment and provides a powerful investigational tool for the study of foot and ankle function. With this device, musculoskeletal structures can be examined in detail under biomechanical conditions similar to those they experience in life. (C) 1998 Elsevier Science Ltd. All rights reserved.