Robotic Leg Control with EMG Decoding in an Amputee with Nerve Transfers

A 31-year-old man who underwent knee-disarticulation amputation had improved control of a robotic leg prosthesis with the use of electromyographic (EMG) signals from natively innervated and surgically reinnervated residual thigh muscles. Summary The clinical application of robotic technology to powered prosthetic knees and ankles is limited by the lack of a robust control strategy. We found that the use of electromyographic (EMG) signals from natively innervated and surgically reinnervated residual thigh muscles in a patient who had undergone knee amputation improved control of a robotic leg prosthesis. EMG signals were decoded with a pattern-recognition algorithm and combined with data from sensors on the prosthesis to interpret the patient's intended movements. This provided robust and intuitive control of ambulation — with seamless transitions between walking on level ground, stairs, and ramps — . . .