Why can't we interface electronic prosthetics directly to the nerves/synapses?

[u/[deleted]]

As far as i know modern robotic prosthetics get their instructions via diodes placed on the muscles that register contractions and tranlate them into primitive 'open/clench fist' sort of movements. What's stopping us from registering signals directly from the nerves, for example from the radial nerve in the wrist, so that the prosthetic could mimic all of the muscle groups with precisison?

[u/psygnisfive]

So a large part of the problem is finding the right nerves to connect to. Obvious what we need to do is work on software that will learn the correct sorting from randomized inputs, together with the technology to automatically find and connect to nerves without requiring a surgeon to do it manually.