Rear-foot, mid-foot and fore-foot motion during the stance phase of gait

摘要: This paper proposes a new protocol designed to track large number of foot segments during the stance phase gait with smallest possible markers, particular clinical focus on coronal plane alignment rear-foot, transverse and sagittal metatarsal bones, changes at medial longitudinal arch. The shank, calcaneus, mid-foot metatarsus were assumed be 3D rigid bodies. axis first, second fifth bones proximal phalanx hallux also tracked independently. Skin markers mounted bony prominences or joint lines, avoiding course main tendons. Trajectories 14 collected by an eight-camera motion capture system 100 Hz population 10 young volunteers. Three-dimensional rotations planar angles calculated according anatomically based reference frames. marker set was well visible throughout gait, even in camera configuration typical analysis full body. time-histories repeatable among subjects consistent biomechanical knowledge. Several dynamic measurements originally taken, such as elevation/drop arch three rear-foot fore-foot rotation deformation metatarsus. information obtained from this protocol, previous knowledge, enhanced our understanding dynamics human stance.