Quantifying rearfoot-forefoot coordination in human walking
Quantifying rearfoot-forefoot coordination in human walking
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DOI：
10.1016/j.jbiomech.2008.07.024
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发表时间：
2008-10-20
影响因子：
2.4
通讯作者：
Hamill, Joseph
中科院分区：
文献类型：
--
作者：
Chang, Ryan;Van Emmerik, Richard;Hamill, Joseph
提出了一种方法来促进关节/段间协调的量化和解释。该技术使用后足-前足运动学数据进行说明。我们扩展了现有的矢量编码技术，并引入了一组操作术语，通过这些术语总结了后脚段和前脚段之间的协调模式：同相、反相、后脚相位和前脚相位。有关足部力学的文献通过矢状面内内侧纵弓角的减小来表征足部推出时的稳定，伴随着前足内旋和同时发生的后足外旋，换句话说，反相运动。根据多节脚模型，在后足和前足节上放置九个皮肤标记。三名健康受试者进行站立校准和步行试验（1.35 ms(-1)），同时三维运动捕捉系统获取他们的运动学。推导出后足-前足关节角度，并从矢状面推断足弓角。后脚和前脚部分的耦合角度被导出并分类为四种协调模式之一。足弓运动学与文献一致；站立时，足弓角达到背屈峰值，然后迅速减小。然而，反相位协调并不是站立中期或后期的主要模式。这些初步数据表明后足和前足之间的协调相互作用比之前描述的更加复杂。该技术提供了关于协调的新视角，并且可以深入了解底层组织（例如足底筋膜）的变形。 (C) 2008 Elsevier Ltd. 保留所有权利。
A method is proposed to facilitate the quantification and interpretation of inter-joint/-segment coordination. This technique is illustrated using rearfoot-forefoot kinematic data. We expand existing vector coding techniques and introduce a set of operational terms through which the coordinative patterns between the rearfoot segment and the forefoot segment are summarized: in-phase, anti-phase, rearfoot phase and forefoot phase. The literature on foot mechanics has characterized the stable foot at pushoff by a decreasing medial longitudinal arch angle in the sagittal plane, which is accompanied by forefoot pronation and concurrent rearfoot supination-in other words, anti-phase motion. Nine skin markers were placed on the rearfoot and forefoot segments according to a multi-segment foot model. Three healthy subjects performed standing calibration and walking trials (1.35 ms(-1)), while a three-dimensional motion capture system acquired their kinematics. Rearfoot-forefoot joint angles were derived and the arch angle was inferred from the sagittal plane. Coupling angles of rearfoot and forefoot segments were derived and categorized into one of the four coordination patterns. Arch kinematics were consistent with the literature; in stance, the arch angle reached peak dorsiflexion, and then decreased rapidly. However, anti-phase coordination was not the predominant pattern during mid- or late stance. These preliminary data suggest that the coordinative interactions between the rearfoot and the forefoot are more complicated than previously described. The technique offers a new perspective on coordination and may provide insight into deformations Of underlying tissues, such as the plantar fascia. (C) 2008 Elsevier Ltd. All rights reserved.