Credit:
Top photo: Tim Evans, 62, during testing; the BCI is picking up his brain signals to turn off the light using a communication board. Photo courtesy of the Crone Lab. Bottom left: Evans sitting in the room at Johns Hopkins Medicine where testing is being done to record his brain signals to control a communication board. Bottom right: Shiyu Luo, first author of the study, is standing in front of the computer that is recording Evans’ brain signals during testing. Portrait photos courtesy of Caslon Hatch.