抄録
It is considered that foot plays an important role in shock absorbing and stability maintaining during various motions including walking, running and so on using the complex structural mechanism. It is critical issue for many rehabilitation professionals and robotics engineers to find out the mechanism of the function of foot exerted based on the complex structure which consists of bones, ligaments, articular cartilage, muscles, fat, and others. The aim of this work is to reveal the effects of the passive hindfoot motion on the ankle moment during stance phase using a computer model of the foot and ankle complex. We obtained the geometrical model of bones and cartilages from MRI and the morphology of ligaments and plantar fascia by anatomy data from literatures. It was found that passive ankle joint resistance moment increases when the anterior motion of talus induced by ground reaction force. However, limitations remained includes that the boundary condition and constraint condition are slightly different from real gait so that it is considered the passive ankle moment is estimated higher value potentially.
