Mind-Controlled Musical Instrument Helps Paralysis Patients Rehabilitate | Popular Science: Like other brain-computer interfaces, a user calibrates the system — and his or her brain — by learning to associate certain brain signals with a stimulus. While wearing an EEG cap, patients focus their attention on four small buttons on a computer screen, each of which triggers a series of musical notes. The user must direct his or her gaze at the target corresponding to the action he or she would like to perform, Miranda and colleagues explain.
Miranda and computer scientists at the University of Essex tested the system on a patient with locked-in syndrome, who learned the system in about two hours and was soon playing notes along with a backup track.
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