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首页> 外文期刊>Gait & posture >A comparison of subtalar joint motion during anticipated medial cutting turns and level walking using a multi-segment foot model.
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A comparison of subtalar joint motion during anticipated medial cutting turns and level walking using a multi-segment foot model.

机译：使用多节段足模型比较预期的内侧切割转弯和水平行走过程中距下关节的运动。

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摘要

The weight-bearing in-vivo kinematics and kinetics of the talocrural joint, subtalar joint and joints of the foot were quantified using optical motion analysis. Twelve healthy subjects were studied during level walking and anticipated medial turns at self-selected pace. A multi-segment model of the foot using skin-mounted marker triads tracked four foot segments: the hindfoot, midfoot, lateral and medial forefoot. The lower leg and thigh were also tracked. Motion between each of the segments could occur in three degrees of rotational freedom, but only six inter-segmental motions were reported in this study: (1) talocrural dorsi-plantar-flexion, (2) subtalar inversion-eversion, (3) frontal plane hindfoot motion, (4) transverse plane hindfoot motion, (5) forefoot supination-pronation twisting and (6) the height-to-length ratio of the medial longitudinal arch. The motion at the subtalar joint during stance phase of walking (eversion then inversion) was reversed during a turning task (inversion then eversion). The external subtalar joint moment was also changed from a moderate eversion moment during walking to a larger inversion moment during the turn. The kinematics of the talocrural joint and the joints of the foot were similar between these two tasks. During a medial turn, the subtalar joint may act to maintain the motions in the foot and talocrural joint that occur during level walking. This is occurring despite the conspicuously different trajectory of the centre of mass of the body. This may allow the foot complex to maintain its function of energy absorption followed by energy return during stance phase that is best suited to level walking.
机译：使用光学运动分析对滑膜关节，距下关节和足关节的负重运动学和动力学进行定量。在水平行走过程中研究了十二名健康受试者，并以自行选择的速度预期了内侧转弯。使用安装在皮肤上的标记三元组的脚的多段模型跟踪了四个脚段：后脚，中脚，外侧和内侧前脚。还跟踪了小腿和大腿。每个节段之间的运动可能以三个旋转自由度发生，但本研究仅报告了六个节段间运动：（1）滑膜背侧plant屈，（2）距下反转-内翻，（3）额叶平面后足运动，（4）平面后足运动，（5）前脚旋后旋前旋和（6）内侧纵弓的高长比。在走路的姿势阶段（颠倒然后颠倒），颠倒了距下关节的运动（颠倒然后颠倒）。外距下关节力矩也从行走时的适度外翻力矩变为转弯时的较大内倾力矩。这两个任务之间的滑石关节和脚关节的运动学相似。在内侧转弯期间，距下关节可起到维持脚和滑膜关节在水平行走过程中发生的运动的作用。尽管身体质心的轨迹明显不同，这种情况仍在发生。这可以使脚部复合体保持其能量吸收功能，然后在站立阶段最适合水平行走的能量返回。

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