Figure 3
From: Quantifying the role of motor imagery in brain-machine interfaces
μ-rhythm suppression during motor imagery over two sensorimotor clusters.
The panel illustrates the mean power spectrum (±standard error across subjects) in the μ-band (8–12 Hz) over two clusters of electrodes located over sensorimotor regions in the left (yellow) and the right (purple) hemisphere during left (on the left) and right (on the right) hand motor imagery. Traces in the contralateral cluster with respect to the imagined hand show a clear μ-rhythm suppression, stronger in the high-aptitude (upper plots) as compared to the low-aptitude (lower plots) group. Conversely, the mean power over the ipsilateral cluster presents a weaker suppression with respect to the contralateral cluster. These effects have been quantified with the proposed index of laterality.
