Multiple brain areas coherent with activity at M1. Right (a), left (b), top (c), front (d), right medial (e), and left medial (f) views of the cerebral map of task-related Z-transformed coherence with M1 activity (VM vs. R) in 2- to 5-Hz range (P < 0.005, uncorrected). A white dot indicates the location of M1, the reference signal. Data represent group-level statistical analysis (n = 15). Significant values are overlaid on an inflated template brain, with gray-coded sulci and gyri identified by curvature indices.