Figure 1.
The region of interest in experiment 1.
The mask covering the entire brain including the cerebellum containing about voxels. MNI coordinates of slice positions are (0,0,0).
Figure 2.
The region of interest in experiment 2.
The mask used in experiment 2 containing about voxels. Talairach coordinates of slice positions are (0,0,0).
Figure 3.
Group averages of eigenvector centrality maps in experiment 1.
The group average of the first scan is shown in the top row. The bottom row shows results of the second scan. The similarity metric was scaled linear correlation. MNI coordinates of slice positions are (−4,−71,−20).
Figure 4.
Pairwise t-test between the two ECMs of experiment 1.
Results are thresholded at (corrected). MNI coordinates of slice positions are (−4,−8,7).
Figure 5.
Group averages of degree centrality maps in experiment 1.
The similarity metric was scaled linear correlation. Note that degree centrality is larger almost everywhere in the brain during the second scan. MNI coordinates of slice positions are (0,−17,18).
Figure 6.
Group averages of eigenvector centrality maps in experiment 2.
The top row shows group averages of eigenvector centrality maps of subjects in the sated state. Below, the group average across the hungry state is shown. The similarity metric used here was scaled linear correlation. Talairach coordinates of slice positions are (4,−49,58).
Figure 7.
Pairwise t-test between sated and hungry subjects using scaled linear correlations in experiment 2.
Results are thresholded at (corrected). Centrality values in precuneus were significantly higher during the hungry state. Other regions did not show significant effects. Talairach coordinates of slice positions are (−2,−50,56).
Figure 8.
Variations in eigenvector centrality across frequency bands in experiment 2.
The maps show a t-test contrasting spectral ECMs of 1/10, 1/15, 1/20 Hz versus 1/25, 1/20, 1/35 Hz. Blue colors indicate regions were higher frequencies showed stronger centrality. Red colors indicate regions where very low frequencies dominate. The maps are thresholded at (corrected). Talairach coordinates of slice positions are (0,0,0).
Figure 9.
Pairwise t-test between sated and hungry subjects using spectral coherence in experiment 2.
The results are shown for three frequencies (0.1 Hz, 0.05 Hz, 0.033 Hz) thresholded at p 0.05 (corrected). Voxels where centrality values were significantly larger in the sated state are shown in red, the reverse is shown in blue. Note that the difference in precuneus is only present at frequencies
0.1 Hz. At 0.033 Hz a significant difference becomes apparent at the ventral striatum. Talairach coordinates of slice positions are (−8,−60,−2), see Table 1.
Table 1.
Significant differences between hungry and sated state using spectral coherence in experiment 2.