In order to control an active prosthetic limb, What is the most effective way of detecting motor signals sent from the brain?
1) Re-routing the motor nerve that would have gone to the missing limb so the neurons innervate muscles close to the prosthetic device
2) Using strain gauges to sense the minute muscle twitches
3) Inserting miniature electrodes that look like acupuncture needles into the limb above the site of amputation, to intercept neural signals that would have gone to the limb
4) Using an electrode cap to analyze EEG signals when the patient is thinking about moving the missing limb
5) Placing an array of sensors on the intact limb on the other side of the body, and analyzing the motion of the intact limb to control the motion of the prosthetic limb