Abstract
The purpose of this study is to establish a 3D foot musculoskeletal model for designing functional footwear by using SIMM (ver7, Masculographics Inc.). In this report, eversion ankle sprain, damage of deltoid ligament, is focused to take into account. Foot joint movements and ligament loads are compared between two barefoot movements under no ankle support (no taping) and ankle support condition with stirrup taping technique (taping). As the results, the behaviors of Talocrual joint (TCJ) and Subtalar joint (STJ) angle during sidestep obtained from the experiment could be reproduced by the model in both no taping and taping conditions. Simulation results explained that Posterior Tibiotalar Ligament (PTL) and Tibilar Calcanear ligament (TCL) loads reduce with increase of elastic modulus of taping tape from 1.5 to 6.0kPa. Tranverse Tarsal joint (TTJ) under taping conditions got bigger internal and eversion angle than that under no taping condition. On the other hand, TCL which attaches TCJ and STJ were almost same load between no taping and taping conditions although TCJ and STJ angle depended on the constraint conditions. It is concluded that influence of foot constraint conditions on foot joints movements and the ligaments loads is quantitatively clarified with proposed foot model.
