The technology underlying brain-to-brain communication has already been used effectively in a number of clinical settings “It was one of the weirdest sensations I have ever felt.” This is how Stephen Dunne, director of neuroscience research at Starlab in Barcelona, described his first experience of transcranial magnetic stimulation (TMS). This new brain stimulation method can, among other things, produce involuntary muscle movements. Dunne used the technology to send a signal to his brain directing his…