Jamshidi Nima, Rostami Mostafa, Najarian Siamak, Menhaj Mohammad Bagher, Saadatnia Mohammad, Salami Firooz
Research Associate, Department of Biomechanics, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran.
J Res Med Sci. 2010 Jan;15(1):33-40.
This pilot study aimed to assess the differences in center of pressure trajectory in neuropathic patients with steppage gait. Steppage gait has previously been evaluated by several biomechanical methods, but plantar pressure distribution has been much less studied. The purpose of this study was to analyze the changes in center of pressure trajectory using a force plate.
The steppage gait group was selected from the patients using drop foot brace (25 male) and the control group was selected from Isfahan university students (20 male). They walked at self- selected speed at a mean of ten trials (+2) to collect the center of pressure using a force plate. Center of pressure patterns were categorized into four patterns based on the center of pressure displacement magnitude (spatial features) through time (temporal features) when the longitudinal axis of the insole was plotted as the Y- axis and the transverse axis of the insole as X- axis during stance phase.
The horizontal angle measured from center of pressure linear regression was positive in the control group (4.6 ± 2.4) (p < 0.005), but negative in the patient group (- 2.3 ± 1.6) (p < 0.005).
The finding of this research measured center of pressure trajectory in steppage gait over time, which is useful for designing better shoe sole and also orthopaedic device and better understanding of stability in patients with drop foot.
本试点研究旨在评估神经性跛行步态患者压力中心轨迹的差异。此前已有多种生物力学方法对跛行步态进行评估，但足底压力分布的研究较少。本研究的目的是使用测力板分析压力中心轨迹的变化。
跛行步态组选自使用垂足支具的患者（25名男性），对照组选自伊斯法罕大学的学生（20名男性）。他们以自定速度行走，平均进行十次试验（±2次），使用测力板收集压力中心数据。在站立期，当将鞋垫的纵轴绘制为Y轴，横轴绘制为X轴时，根据压力中心位移幅度（空间特征）随时间（时间特征）的变化，将压力中心模式分为四种模式。
对照组中，通过压力中心线性回归测量的水平角度为正值（4.6±2.4）（p<0.005），而患者组为负值（-2.3±1.6）（p<0.005）。
本研究结果测量了跛行步态中压力中心轨迹随时间的变化，这有助于设计更好的鞋底以及矫形器械，并更好地理解垂足患者的稳定性。
