Question: How do you get the brain signals to make the artificial limbs move?

Zach Welshman answered on 16 Mar 2017:

Well there is the exciting area called optogenetics (https://en.wikipedia.org/wiki/Optogenetics) which basically means using light to control cells for example muscle cells, its akin to fibre optic broadband. These muscle nerves can be described a series of electrical signals that can be converted to movement. This technology is a long way off, but has been demonstrated useful in rats to excite parts of the brain associated with positive reinforcement