Magnets could offer better control of prosthetic limbs

System uses tiny magnetic beads to rapidly measure the position of muscles and relay that information to a bionic prosthesis.

For people with amputation who have prosthetic limbs, one of the greatest challenges is controlling the prosthesis so that it moves the same way a natural limb would. Most prosthetic limbs are controlled using electromyography, a way of recording electrical activity from the muscles, but this approach provides only limited control of the prosthesis.