For some time now, we’ve been hearing about prosthetic limbs that are designed to work with amputees’ bodies. MIT researchers are taking a different approach, though, with a new type of amputation that facilitates the use of prostheses.
Most movements of the arms and legs involve two joined muscles, one of which stretches while the other contracts. These are known as agonist-antagonist pairs, which the biceps and triceps are a good example of – when a person bends their elbow, the biceps muscle contracts as the triceps muscle stretches. That stretching motion relays sensory feedba