It's already a thing, at least with animals. Scientists have implanted electrodes in the brains of creatures as diverse as insects and mice to pretty much remote-control them.

It should be noted, though, that the more complex a brain is, the harder it is to work with. Flies can basically be manuvered directly (on the ground at least), but for mice they've only managed to 'encourage' them to move left, right, forward or back by triggering their pleasure centers (and it still can't override basic instincts like forcing them to jump off a high ledge).

In higher mammals like apes and humans, even the most basic physical movements are not hardwired from birth, but learned over the course of childhood, so the pattern in which they are encoded in the brain will differ from one individual to the next. We can analyze someone's personal brain-to-body interface by scanning their brain over time, examining which neurons fire when they perform certain actions. We've been using this for robotic prosthetics, but by reversing the process it could presumably be used for controlling the body.

However, it does mean that you (or an AI) would need some time to study the subject before you could control them; you couldn't just stick a mind control implant into someone and expect it to work immeditately. This can be used for dramatic tension; a person knows they have an implant and they only have a limited time to get it out before it learns their brain's structure and takes over.

It's already a thing, at least with animals. Scientists have implanted electrodes in the brains of creatures as diverse as insects and mice to pretty much remote-control them.

It should be noted, though, that the more complex a brain is, the harder it is to work with. Flies can basically be maneuvered directly (on the ground at least), but for mice they've only managed to 'encourage' them to move left, right, forward or back by triggering their pleasure centers (and it still can't override basic instincts like forcing them to jump off a high ledge).

In higher mammals like apes and humans, even the most basic physical movements are not hardwired from birth, but learned over the course of childhood, so the pattern in which they are encoded in the brain will differ from one individual to the next. We can analyze someone's personal brain-to-body interface by scanning their brain over time, examining which neurons fire when they perform certain actions. We've been using this for robotic prosthetics, but by reversing the process it could presumably be used for controlling the body.

However, it does mean that you (or an AI) would need some time to study the subject before you could control them; you couldn't just stick a mind control implant into someone and expect it to work immediately. This can be used for dramatic tension; a person knows they have an implant and they only have a limited time to get it out before it learns their brain's structure and takes over.