Zhang Yu, Yao Zilong, Wang Shaobai, Huang Wenhan, Ma Limin, Huang Huayang, Xia Hong
Department of Orthopaedic Surgery, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, Guangdong 510010, China.
Department of Orthopaedic Surgery, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, Guangdong 510010, China; Graduate School, Southern Medical University, Guangzhou, Guangdong, China.
Gait Posture. 2015 Mar;41(3):763-8. doi: 10.1016/j.gaitpost.2015.01.020. Epub 2015 Jan 28.
Normative tibiofemoral data of Chinese or Asian subjects during gait is rarely reported. This study is aimed at investigating the six-degree-of-freedom (6DOF) knee kinematics of adult Chinese during gait, based on a novel portable system. Twenty-eight healthy Chinese subjects (56 knees) were studied during their treadmill gaits. A set of optical marker clusters were attached to the thighs and shanks of each subject, who was tracked by an optical joint kinematics measurement system. Knee landmarks were initially digitized with respect to the marker cluster sets to determine the local coordinate systems for calculation of 6DOF knee joint kinematics. The range of motion (ROM) in 6DOF and 5 kinematic parameters were calculated and compared between bilateral knees and genders. We discovered that knee rotations, as well as motion in proximodistal and mediolateral translations, showed similar patterns in flexion and extension. However, the anteroposterior translations did not show a clear pattern. The results of ROM in 6DOF obtained in this study are comparable with those reported in existing literature. No statistical difference was found between left and right knees either in the ROMs or in the 5 kinematic parameters. However, the ROM in the mediolateral direction during gait was found to be higher in men than women (P=0.014). In addition, the femurs of female subjects rotated more internally than the femurs of male during the stance phase (P=0.011). We concluded that normal Chinese knees exhibited distinct gait patterns, except for anteroposterior motion. Women and men exhibit different axial rotations and mediolateral translation patterns during their treadmill gait.
关于中国或亚洲受试者在步态过程中的正常胫股数据鲜有报道。本研究旨在基于一种新型便携式系统，调查成年中国人在步态过程中的六自由度（6DOF）膝关节运动学。对28名健康的中国受试者（56个膝关节）在跑步机上行走时进行了研究。在每个受试者的大腿和小腿上附着了一组光学标记簇，并通过光学关节运动学测量系统对其进行跟踪。最初针对标记簇集对膝关节标志点进行数字化处理，以确定用于计算6DOF膝关节运动学的局部坐标系。计算并比较了双侧膝关节和不同性别的6DOF运动范围（ROM）及5个运动学参数。我们发现，膝关节的旋转以及近远侧和内外侧平移运动在屈伸过程中呈现出相似的模式。然而，前后平移并未呈现出明显的模式。本研究中获得的6DOF的ROM结果与现有文献报道的结果具有可比性。在ROM或5个运动学参数方面，左右膝关节之间均未发现统计学差异。然而，发现男性在步态过程中的内外侧方向ROM高于女性（P = 0.014）。此外，在站立期，女性受试者的股骨比男性受试者的股骨内旋更多（P = 0.011）。我们得出结论，除前后运动外，正常中国人群的膝关节呈现出独特的步态模式。在跑步机步态过程中，女性和男性表现出不同的轴向旋转和内外侧平移模式。
