So now, recent news concerns several crucial brain manipulating technologies :-
1)Sound frequencies, for gross level mood influencing, or simply trophic-like responses.
2)Magnetic influence on specific parts of a brain can influence 'moral' judgement
3)Electrode arrays can now be implanted directly on the brain surface, and so can monitor and potentially influence activity. Currently this would be at the level of preventing epileptic seizures and perhaps overcoming nerve damage to receive and transmit messages to muscles. Could be much more though.
Very interesting, from a 'what if?' perspective.