University of Washington researchers.
The first brain-to-brain communication occurred when a rat pressed a lever, anticipating the tasty reward it’d been trained to expect. An implant in the rat’s brain converted its neural activity into an electronic signal and beamed the impulse to the brain of the second rat, which leaped forward and pressed a lever in its own cage . But rat #2 had never been trained to press the lever. Its movement impulse came not from its own brain, but directly from the brain of rat #1 – despite the fact that the two were separated by thousands of miles.