Comparative verification into gait motion of healthy subjects and trans-femoral amputee based on singular value decomposition

In human gait locomotion analysis, which is one useful method for efficient physical rehabilitation to define various quantitative evaluation indices, ground reaction force, joint angle and joint loads are measured during gait. On the other hand, the analysis of the correlation in the recorded joint motion extracts a few simultaneously activating segmental coordination patterns, and the structure of the intersegmental coordination is attracting attention to an expected relationship with a control strategy. However, this procedure has not been applied to trans-femoral prosthetic gait locomotion yet. In this paper, joint angles as kinematic parameters applied on the lower limb of healthy subjects and trans-femoral amputee with the prosthetic limb during their gait locomotion are analyzed by singular value decomposition and mutual comparative verification of them is performed. As a result of the experiments and consideration, the effectiveness of the method using singular value decomposition is validated because it can quantitatively express comprehensive physical phenomena for trans-femoral prosthetic gait.