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In this movie, a person with spinal cord injury (i.e., User A (Ref. 34)) uses scalp-recorded sensorimotor rhythms to control cursor movement in two dimensions. In each trial, a target appears at one of 8 possible locations on the periphery of the screen and one second later the cursor appears in the center and moves with its vertical movement controlled by the sum of the weighted amplitudes of a 24-Hz beta rhythm recorded from the scalp over left and right sensorimotor cortices and its horizontal movement controlled by the difference between the weighted amplitudes of a 12-Hz mu rhythm recorded over left and right sensorimotor cortices (Sect. 4.3.3, Fig. 4.1).
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