Abstract
Faint, slipping, stumbling and missing step, are enumerated as a factor of the fall for the elderly while walking. Moreover, a decay of the muscle function and a decrease in Range Of Motion (ROM) and the function of the ankle are thought indirect factors to fall. The relationship between these factors of fall and gait has mostly been clarified from the measurement of gait. However those results are only guesses by a statistical technique, not casual relation for each other. In this research, we clarify the role in gait of each joint and fall mechanism of the elderly, with the gait simulation used the solid body link model.
