amputations too high up, or accidental amputations that mangle rather than cleanly remove, are more likely to make EMG decoding harder. If the axons are too da

amputations too high up, or accidental amputations that mangle rather than cleanly remove, are more likely to make EMG decoding harder. If the axons are too damaged during the amputation they'll wither and die, so the signal's lost; if the arm is removed too high up, it becomes more challenging to isolate existing neurons that went all the way to the fingers. In both cases, muscle movement itself will swamp the motor neuron signal in ways that make demuxing very challenging.