Lower Extremity Amputee

The purpose of this study is to evaluate the effectiveness of providing sensation of the missing limb to individuals with above and below the knee limb loss. The investigators will implanted stimulating electrodes to send small electrical currents to the remaining nerves. These small electrical currents cause the nerves to generate signals that are then transferred to your brain similar to how the information about your foot and lower limb used to be transferred to the brain prior to your limb loss. Additionally, there is the option to have muscle recording electrodes implanted within the muscles of the lower limb with the goal to develop a motor controller that would allow the user to have intuitive control of a robotic prosthetic leg.