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Knee Moment in Below-Knee Amputees

Amputees with a below-knee prosthesis show a decrease in knee moment in their prosthetic limb, even though they still have all knee muscles. This project aims to find causes for this change in gait to propose a prosthetic leg that yields an improved gait. It is hypothesized that the stiffness of the prosthetic ankle influences the knee moment. A model of the human gait is used to analyse the knee moment using different stiffness values for the prosthetic ankle. Next to this, the effect of the change on the muscle effort is studied. The advantages and disadvantages of this altered gait are studied.

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