Mahieu Céline, Salvia Patrick, Beyer Benoît, Rooze Marcel, Feipel Véronique, Van Sint Jan Serge
Laboratory of Anatomy, Biomechanics and Organogenesis, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium.
Center for Functional Evaluation, Université Libre de Bruxelles, Brussels, Belgium.
Int Biomech. 2019 Dec;6(1):75-84. doi: 10.1080/23335432.2019.1642142.
This study aimed to investigate both foot arch-shaped architecture and forefoot kinematics during gait. Using a dedicated three-compartment forefoot subdivision, we studied asymptomatic subjects and quantified disorders related to the metatarsal arch. Foot motion and arch shape were measured in 30 healthy subjects with a motion-capture system and force plates. Kinematic results were expressed using a novel model, which anatomically divides the forefoot into three parts. This model integrated the medial longitudinal arch angle and the metatarsal arch height and width. During the first part of stance phase, the medial longitudinal arch flattens and all foot segments move toward dorsiflexion. During terminal stance and preswing phase, medial longitudinal and metatarsal arch restoration was noted with plantarflexion of all segments, an eversion and abduction of the medial forefoot, and an inversion and adduction of the lateral forefoot. Kinematics obtained with the proposed forefoot model corroborates metatarsal arch restoration in late stance. This observation supports the fact that foot architecture is supple until midstance and subsequently creates a rigid lever arm with restored arches to support propulsion. This study's results and methods highlight the potential of the three-compartment model for use in clinical decision-making.
本研究旨在调查步态期间的足弓形状结构和前足运动学。使用专门的三部分前足细分方法，我们研究了无症状受试者，并对与跖骨弓相关的病症进行了量化。使用运动捕捉系统和测力板对30名健康受试者的足部运动和足弓形状进行了测量。运动学结果采用一种新颖的模型来表示，该模型在解剖学上将前足分为三个部分。该模型整合了内侧纵弓角度以及跖骨弓的高度和宽度。在站立期的第一部分，内侧纵弓变平，所有足部节段均向背屈移动。在终末站立期和摆动前期，观察到内侧纵弓和跖骨弓恢复，所有节段跖屈，前足内侧外翻和外展，前足外侧内翻和内收。使用所提出的前足模型获得的运动学结果证实了站立后期跖骨弓的恢复。这一观察结果支持了以下事实：足结构在支撑中期之前是柔韧的，随后形成一个具有恢复足弓的刚性杠杆臂以支持推进。本研究的结果和方法突出了三部分模型在临床决策中的应用潜力。
