Opposing cortical forces: Alpha slowing and sensorimotor mu acceleration during motor-related BCI training
Fig 5
ROI-level correlation matrices summarizing inter-individual coupling of session-long alpha/mu dynamics across cortical regions for (a) alpha/mu frequency slopes and (b) alpha/mu magnitude slopes.
Rows correspond to datasets, and columns indicate pairwise correlations between regional slopes (frontal–central, posterior–central, frontal–centroparietal, and posterior–centroparietal). Only correlations surviving multiple-comparison correction were retained. Significant channel-wise correlations were subsequently averaged within ROIs. Color encodes the Pearson correlation coefficient across participants, with red indicating positive coupling and blue indicating inverse coupling. The matrices reveal consistent cross-dataset patterns, including inverse relationships between sensorimotor (central/centroparietal) frequency acceleration and posterior or frontal alpha dynamics.