 This involves inserting a small permanent magnet into the distal end of the residual bone of subjects with upper limb amputations.When a subject rotates the residual arm, the magnet will rotate with the residual bone, causing a change in magnetic field distribution.EEG (electroencephalogram) signals, detected using small flat metal discs attached to the scalp, essentially decoding human brain activity used for physical movement, is used to control the robotic limbs.