An anonymous reader writes "Opening a fascinating set of ethical and legal issues, researchers at UW Seattle have demonstrated the first device to allow direct communication between two humans' brains. Effectively, they allowed a subject to play a video game with another subject's fingers. For now, the communication is uni-directional, though they intend to extend it to bi-directional. EEG sensors are attached to a subject's motor cortex to detect 'motor imagery' — imagined hand movement, in this case. That activity is translated and sent over a computer network where it triggers a Transcranial Magnetic Stimulator (TMS) located over Subject 2's motor cortex. Effectively, Subject 1 imagines moving their hand, and Subject 2's hand moved."