A rat was implanted with a 32-unit microelectrode cortical array in either M1 or S1. The rat was then trained to choose between two alternatives based on external stimuli.
Meanwhile, another rat was implanted with 6 stimulating electrodes in the same area as the first rat. It was trained to choose between the same two alternatives based on a stimulation pattern conveyed via the electrodes.
Then the signals recorded from the first rat’s brain were processed ald sent into the second rat’s brain. Both rats were trained together and both were rewarded when both made the right choice. The second rat learned to make the same choice as the first rat 60% of the time.
Miguel Pais-Vieira, Mikhail Lebedev, Carolina Kunicki, Jing Wang, Miguel A. L. Nicolelis. A Brain-to-Brain Interface for Real-Time Sharing of Sensorimotor Information. Scientific Reports 3, Article number: 1319. Received 20 December 2012.