Jose Delgado wrote around 500 articles on implantation of electrodes in brains of humans and animals and believed in a "pscyhocivilized society", in which people could alter and influence their own brain functions with the help of electrodes. He implanted around 25 patients with electrodes and published a book in 1969 about his ideas and research. 

One of his patients tried to resist the remote influence but couldn't. Another one was moving his head from the left to the right all the time and insisted that he did so by his free will. A 25 year old woman smashed the guitarr that she played peacefully just a second ago to the wall, after stimulation of a region in the limbic system, which regulates emotion. 

Read more:

http://www.wireheading.com/delgado/brainchips.pdf