Hayashi S
Nihon Seikeigeka Gakkai Zasshi. 1983 Dec;57(12):1911-21.
Analysis of the lateral force of floor reactions has only been reported with reference to the vertical and fore- and-aft force because of large individual variations and great differences between the right and left limb of the same individual on the normal pattern of the force curve. In this study, the lateral force in normal and above-knee prosthetic gait was evaluated by calculating the total impulse during stance phase duration as well as by characteristic points of the force curve. The sensitivity of the electronic unit connected to the Kistler 's force plate was enhanced four times. The following results were obtained: In normal gait, the lateral stability during stance phase was shown by the lateral force which was proved to be a regulative element for rhythmical forward movement of the center of gravity of the body. The lateral stability in above-knee prosthetic gait was evaluated not only by the characteristic pattern of the force curve, but also by a decreased difference of the impulse of lateral force between the natural and artificial limb. The initial adduction angle of above-knee prostheses was determined by such a definition of the lateral force. Five degrees proved to be the most appropriate angle, as has been generally accepted. The lateral force of floor reaction can be definitely measured by a quantitative analysis of the total impulse during stance phase duration.
由于个体差异较大，且同一个体左右下肢在力曲线正常模式下存在巨大差异，因此仅在参考垂直力和前后力时才报告了地面反作用力的侧向力分析。在本研究中，通过计算站立期的总冲量以及力曲线的特征点，对正常和膝上假肢步态中的侧向力进行了评估。连接到奇石乐测力板的电子单元的灵敏度提高了四倍。得到以下结果：在正常步态中，站立期的侧向稳定性通过侧向力表现出来，该侧向力被证明是身体重心有节奏向前移动的调节因素。膝上假肢步态的侧向稳定性不仅通过力曲线的特征模式进行评估，还通过自然肢体和假肢之间侧向力冲量差异的减小来评估。膝上假肢的初始内收角度由这种侧向力的定义确定。五度被证明是最合适的角度，这一点已被普遍接受。通过对站立期总冲量的定量分析，可以明确测量地面反作用力的侧向力。
