A representation of the motor network and of how the connectivity is calculated. (a) A representation of simulated brain sources in a volumetric slice (blue time courses, marked as S1, S2, and S3) and hand surface myography correlated with tracks S2 and S3 (EMG, red time course). (b) The scheme of functional connectivity. Coherence is calculated between EMG and all other sources. (c) A schematic output of DICS beamformer coherence. Note the presence of only one peak corresponding with the source having the highest SNR (S1). The red arrow indicates that this peak has to be suppressed by the nulling beamformer in order to localize the second EMG-correlated source (S3).
