Figure 13.

Dynamic networks of individual leg EMG frequency bands and integrated brain dynamics at cortical locations for different physiological states. Links in network maps represent group-averaged TDS coupling strength (section Materials and Methods 2.5.1) between each frequency band of leg muscle tone and a given cortical location, after averaging over all brain waves (see Figure 4 and section Materials and Methods 2.5.3), and correspond to the elements in the coarse-grained matrices shown in Figure 5B, right panels. Brain areas are represented by Frontal (Fp1, Fp2), Central (C3, C4), and Occipital (O1, O2) EEG channels, while peripheral network nodes with different colors represent leg EMG frequency bands. Line thickness indicates link strength (thin links with 3% ≤ TDS < 5%, intermediate links with 5% ≤ TDS < 7.5% and thick links with TDS ≥ 7.5%) and links color corresponds to the color of leg EMG frequency bands (network nodes). Network links are generally stronger during wake, and their strength uniformly declines with transition to REM, LS, and DS, which exhibits weak interactions across all frequency bands. No clear dominant communication pathways are observed in any of the four physiologic states.