Motion characteristics of the medial and lateral longitudinal arch during landing
Motion characteristics of the medial and lateral longitudinal arch during landing
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DOI：
10.1007/s00421-008-0915-3
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发表时间：
2009-02-01
影响因子：
3
通讯作者：
Fukubayashi, Toru
中科院分区：
文献类型：
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作者：
Fukano, Mako;Fukubayashi, Toru
本研究测定了内侧纵弓(MLA)和外侧纵弓(LLA)在着陆过程中的矢状面运动及其运动学。获得IRB批准的知情同意来自10名健康男性受试者(23.4+/-A3.4岁)，他们从10厘米的高度进行单腿着陆，并伸展膝盖。然后，受试者被要求在每次着陆后停下来保持平衡。每个试验都使用电影血管造影术进行记录。使用相当于200 mA(1ms)、强度为50千伏的辐射曝光，以60赫兹的速率获得图像。使用测力板测量同时的地面反作用力。使用模板法对数据进行分析。矢状面运动定义为牙弓角度和平移运动的变化。进行配对t检验以确定MLA和LLA之间测量值的差异。在80~100ms范围内，所有受试者的牙弓角度均随时间增加。LLA的牙弓角度明显大于MLA。在平移运动方面，MLA的运动大于LLA。显然，各纵拱在吸收着陆冲击方面有不同的变形模式。MLA的角度变化很小，平移程度适中。相反，LLA的运动主要是角度变化，并有少量的平移运动。
This study determined sagittal plane motion of the medial longitudinal arch (MLA) and lateral longitudinal arch (LLA) as well as the kinematics of the arch during landing. IRB-approved informed consent was obtained from 10 healthy male subjects (23.4 +/- A 3.4 years old) who performed single leg landings from a height of 10 cm with their knee extended. The subjects were then asked to stop and balance after each landing. Each trial was recorded using cineangiography. Images were obtained at a rate of 60 Hz using a radiation exposure equivalent to 200 mA (1 ms) with an intensity of 50 kV. Simultaneous ground reaction forces were measured using a force plate. The data were analyzed using a template method. Sagittal motion was defined as the change in the angle and the translational motion of the arch. A paired t test was performed to determine the differences in the measured values between the MLA and the LLA. The magnitude of the arch angle increased with time for 80-100 ms in all subjects. The magnitude of the arch angle for the LLA was significantly larger than that for the MLA. Regarding translational motion, the motion of the MLA was larger than that of the LLA. It was clear that each longitudinal arch had a different deformation pattern in absorbing the impact on landing. The MLA had a small angular change and a moderate degree of translational motion. Conversely, the motion of the LLA was mainly an angular change with a small translational motion.