5 years ago to James Barnes have amputated the right hand above an elbow after a severe electric trauma. However nevertheless some muscles have partially kept functions on control of fingers. The team of researchers of Institute of technology of Georgia led by Gil Weinberg has used it. They have developed an artificial limb by means of which James has had an opportunity to play a piano.
In an artificial limb the elektromiogrammny sensors which are found as in usual, and advanced artificial limbs are used. These sensors by means of electrodes fix electric signals from muscles. However, as Gil Weinberg considers, they aren't really exact.