目的基于Matlab建立一套适用于非人灵长类动物的步态数据处理方法。方法通过VICON系统在3只恒河猴脊髓损伤术后6周进行后肢步态分析测试，获取运动学数据。通过Excel Link将Matlab与Microsoft Excel相结合，实现对运动学原始数据的筛选和提取，并在Matlab环境下进行计算。结果通过计算得到步长、步高以及膝关节和踝关节角度等运动学参数。在0.2 km/h、0.5 km/h、0.8 km/h速度下，步长(F=2.869, P=0.088)和步高(F=1.148, P=0.344)均值无显著性差异(P>0.05)，表明数据模型可重复。通过计算得到的角度-时间曲线图反映了关节功能和运动变化规律。系统初步实现了足部步态轨迹的描绘，还实现了步态运动的二维/三维轨迹图的生成。结论该系统使得实验原始数据的处理不依赖于VICON系统，计算得到的参数和轨迹描绘可基本满足非人灵长类动物后肢行为学评价的需求。%Objective To establish a new processing method for gait data on Matlab to evaluate the hindlimbs behavior of non-human primates. Methods Gait analysis was tested on three rhesus monkeys 6 weeks after spinal cord injury, and kinematics data of hindlimbs were obtained using the VICON system. The raw data of kinematics were filtered and extracted, which were achieved through VICON 3D motion capture system with the Excel link combining Matlab with Microsoft Excel, and calculated in the Matlab environment. Results The kinematic parameters such as step length, step height, knee joint angle, and malleolus joint angle were gained by calculating. The mean val-ues of step length (F=2.869, P=0.088) and step height (F=1.148, P=0.344) showed no significant difference at three speeds, which implied a higher repeatability of the data model. Angle-time curve reflected the joint function and movement. This system initially described the foot gait trajectory which could be used in gait repetitive analysis, and also generated the gait 2D/3D trajectories of hindlimbs. Conclusion The implement of these functions makes the post-processing of data more flexible and open whitout VICON system, and the calculated parame-ters and space tracing of gait trajectory basically meet the need of hindlimb behavior evaluation for nonhuman primate.
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