Source analysis results. A, Grand-average results for DICS beamformer source analysis of entrained 10 Hz activity during stimulation, interpolated onto a single-subject MNI template brain. Values are masked with cluster-based permutation test p < 0.05, controlling for multiple comparisons. The left and right panels show the sources for the 10 Hz activity during left and right rhythmic stimulation, respectively. B, Same, but with activity estimated during the postentrainment window.