Figure 1
From: Respiration-entrained brain oscillations in healthy fMRI participants with high anxiety
Directed coupling strengths for the high anxiety group in the 0.2–0.4 Hz frequency band. Each box shows the strength of coupling on the vertical scale. The height of bars is proportional to the mean error. The blue color shows the flow from the signal marked below the given column to the signal marked at the left, and the red color the flow from the signal marked at left to the signal marked below. Significant differences between couplings of inflow and outflow are marked by stars (p < 0.05). Note the highly-significant flow from the middle frontal gyrus (MFG, ROI 7) to the brainstem (ROIs 93 and 103), respiration and RRI (marked by a stippled ellipse), and the significant flow from the MFG to the precentral gyrus (PCG, ROI 1) and the significant flow from RRI to respiration (marked by a stippled circles).
