Sensor-level within-subject time-frequency analyses during motor initiation (LH condition).

Baseline-corrected spatio-temporal clusters (left) and mean ERSP of the corresponding clusters (right): (A, B, E, F) theta clusters; (C, G) alpha/mu clusters; (D, H) beta clusters. White dots indicate sensors exhibiting significant spectral power changes. Pairwise comparison is performed via one-tailed one-sampled t-test with p_pairwise = 0.005 (dF = 9, t_critical = ±3.2498) and cluster-based analysis is performed via non-parametric permutation test with p_cluster = 0.05.