Improving Mu Rhythm Brain-Computer Interface Performance by Providing Specific Instructions for Control

Brain-computer interfaces (BCIs) are used to aid persons who have limited or no natural motor control. The mu rhythm is often used a neural control signal because it can be voluntarily modulated using motor imagery or relaxation. Practically using mu-rhythm BCIs presents issues involving long training times, variable accuracy, and even the exclusion of some participants due to lack of control. This study used a bilateral mu-based BCI to investigate whether giving participants specific instructions on how to modulate their mu rhythm would increase mu rhythm control as compared to the usual vague instructions given.