Zhang Qiaolin, Sun Dong, Wang Meizi, Tafferner-Gulyás Viktória, Chen Hairong, Bíró István, Gu Yaodong
Faculty of Sports Science, Ningbo University, Ningbo, PR China; Doctoral School on Safety and Security Sciences, Óbuda University, Budapest, Hungary; Faculty of Engineering, University of Szeged, Szeged, Hungary.
Faculty of Sports Science, Ningbo University, Ningbo, PR China.
Med Eng Phys. 2024 Dec;134:104259. doi: 10.1016/j.medengphy.2024.104259. Epub 2024 Nov 19.
This study explored the relationship between the foot arch stiffness and windlass mechanism, focusing on the contribution of the posterior transverse arch. Understanding the changing characteristics of foot stiffness is critical for providing a scientific basis for treating foot-related diseases. Based on a healthy male's computed tomography, kinematic, and dynamics data, a foot musculoskeletal finite element model with a dorsiflexion angle of 30°of metatarsophalangeal joint was established. Analyze the changes in stress distribution of the plantar fascia, metatarsophalangeal joint angle, arch height, and length during barefoot walking as the stiffness of the plantar fascia varies from 25 % to 200 %. For validation, the simulated arch parameters were compared with the dual fluorescence imaging system measurements. The width of transverse arch, height, and length of longitudinal arch measured by the dual fluorescence imaging system were 45.14 ± 1.63 mm, 29.29 ± 1.57 mm, and 155.16 ± 2.69 mm, respectively. The results of the simulation were 46.51 mm, 29.96 mm, and 156.71 mm, respectively. With the increase of plantar fascia stiffness, the effect of the windlass mechanism increased, the flexion angle of the metatarsophalangeal joint decreased, the distal stress of plantar fascia decreased gradually, while the proximal and middle stress increased, the transverse arch angle increased, but when the plantar fascia stiffness exceeds 150 %, the transverse arch angle decreases. The increase of plantar fascia stiffness will increase the effect of the windlass mechanism but decrease the flexion angle of the metatarsophalangeal joint. The stiffness of the plantar fascia influences the behavior of the plantar fascia. The plantar fascia stiffness affects the distal tension of the plantar fascia by affecting the flexion of the metatarsophalangeal joint in the plantar windlass mechanism. It affects the stiffness of the transverse arch of the foot together with the ground reaction force acting on the distal metatarsal.
本研究探讨了足弓刚度与绞盘机制之间的关系，重点关注后横弓的作用。了解足部刚度的变化特征对于为足部相关疾病的治疗提供科学依据至关重要。基于一名健康男性的计算机断层扫描、运动学和动力学数据，建立了跖趾关节背屈角度为30°的足部肌肉骨骼有限元模型。分析在裸足行走过程中，当足底筋膜刚度从25%变化到200%时，足底筋膜应力分布、跖趾关节角度、足弓高度和长度的变化。为进行验证，将模拟的足弓参数与双荧光成像系统测量结果进行比较。双荧光成像系统测量的横弓宽度、纵弓高度和长度分别为45.14±1.63毫米、29.29±1.57毫米和155.16±2.69毫米。模拟结果分别为46.51毫米、29.96毫米和156.71毫米。随着足底筋膜刚度的增加，绞盘机制的作用增强，跖趾关节的屈曲角度减小，足底筋膜远端应力逐渐降低，而近端和中部应力增加，横弓角度增加，但当足底筋膜刚度超过150%时，横弓角度减小。足底筋膜刚度的增加会增强绞盘机制的作用，但会减小跖趾关节的屈曲角度。足底筋膜的刚度会影响足底筋膜的行为。足底筋膜刚度通过影响跖底绞盘机制中跖趾关节的屈曲来影响足底筋膜的远端张力。它与作用于跖骨远端的地面反作用力一起影响足部横弓的刚度。
