Weighted Phase Lag Index and Graph Analysis: Preliminary Investigation of Functional Connectivity during Resting State in Children

Figure 3

Topographic group results of sensor power, coherence, and WPLI in 1.5 Hz wide frequency bands, from 3.5 to 12 Hz. A cluster of sensors with high power is detectable in the alpha band. The sensor with the highest FFT power (MLO11, indicated by a white dot) was selected as reference node for the connectivity calculations (one-to-all connectivity). Note that the coherence topography is roughly uninformative across frequencies and strongly affected by volume conduction effects, while WPLI compares favorably in both criteria. Much more detail is discernible in the WPLI topography.