Fig. 4

Typical EC network patterns in the 13–90 Hz frequency range in migraine patients and controls in response to positive, negative, and neutral human expressions, respectively, visualized from the lateral (left column) and axial (right column) views. The migraine patients showed a significantly altered pattern of EC network at 30–90 Hz frequency range in viewing the negative emotional stimuli as compared to the controls, showing more connections from the prefrontal lobe to the temporal lobe, which are indicated by green arrows. No significant differences were observed between the two groups exposure to positive and neutral stimuli. (Colored figure online)