Beta Rhythm

A pattern of electrical brain activity oscillating at approximately 13-30 Hz, commonly recorded over the sensorimotor cortex. Like mu rhythms, beta rhythms are modulated by movement and motor imagery — they are suppressed during movement and show a characteristic post-movement rebound (increase) after movement ends. In brain-computer interface applications, beta rhythm modulation serves as a control signal that users can learn to voluntarily regulate. The combination of mu and beta rhythm control allows BCI users to achieve multidimensional cursor control, providing more flexible communication and device operation for people with severe motor impairments.