Figure 4.

Illustration of the proposed theoretical account of the PCC, combining the three dimensions of (i) arousal; (ii) internal/external focus; and (iii) breadth of attentional focus. The central panel illustrates the PCC during a low state of arousal, where there is little interaction with other networks. Each panel surrounding this illustrates one of four possible states from the interaction of an internal/external and a broad/narrow focus of attention. Interaction between the PCC and intrinsic connectivity networks are shown as arrows: solid arrows signify increased functional connectivity, broken arrows greater anti-correlation. DAN = dorsal attention network. Red areas within the PCC signify relatively increased neural activity, blue areas relatively decreased activity. For the purposes of illustration, dorsal and ventral PCC regions are shown as separated areas.