National Geographic : 2010 Jan
1 2 3 4 Elbow rotator Shoulder rotators Humeral rotator Nerve Power coil MODULAR PROSTHETIC LIMB UP TO 22 MOVEMENTS Nerves running from the spinal cord (1) will send the brain's commands to electrode arrays implanted in the residual nerves (2). A computer chip on each array sends data wirelessly to a receiver on the skin (3). The receiver wires the data to another chip (4) that decodes the command and wires it to the limb controller in the palm (5), which sets the motors in motion. LITHIUM BATTERY Removable for daily recharging. CARBON FIBER HARNESS Molded to the body, the shell is strong but lightweight. For amputees with severely damaged residual nerves, elec- trode arrays could be implanted in the brain. The brain's commands would be received by sensors inacapandsentby wire to the arm.