1969
Operant Conditioning of Cortical Unit Activity
http://e.guigon.free.fr/rsc/article/Fetz69.pdf
2007
Compact Movable Microwave Array for Long-term Chronic Unit Recording in Cerebral Cortex of Primates
http://www.unifr.ch/inph/vclab/assets/files/PDFs/jackson.3109.pdf
2012
Research:
Bidirectional interactions between brain and implanted computers
http://www.cbi.cmu.edu/news/bioimaging/images/12_BioimagingDay_Poster_Keynote.pdf
The article by Jose M. Carmena (2012) mentioned that brain machine interface started more than 40 years ago at the University of Washington with the pioneering experiment in 1969 by Eberhard Fetz. In this experiment, electrodes were implanted in the brain of a monkey and it was seen that whenever a neuron was fired, an external needle deflected. Observing this deflection and given an incentive of a food pellet, the monkey were able to increase the frequency of needle deflections. This experiment demonstrated that the brain can control a device external to the body.
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