||Technological advancements in lower limb prostheses have resulted in actuated motors
in both knees and ankles. Currently, these components are controlled by information
measured from various electromechanical sensors attached to the prosthesis. Our aim
is to enhance the control information provided to powered prosthetic components by
including input from the user via interpreted myoelectric signals (MESs). To extract
useful control information, it is imperative that consistent, high-quality MESs be
collected from patients each time they don the socket. In this work, we present approaches
to maintaining consistent electrode placements on individuals with transfemoral and
transtibial amputations during static non-weight-bearing conditions and dynamic weight-bearing
activities. Our results show that a variety of methods, similar to those used in upper
limb fittings, may be used to collect high-quality MESs during static non-weight-bearing
conditions. MES collection during dynamic weight-bearing activities is more challenging.
The type, size, shape, and placement of electrodes must be carefully chosen to maintain
contact with the skin without compromising comfort during weight-bearing activity.