Figure 7.

DCM with the highest model evidence for connectivity between FEF, IPS, and visual cortex—in relation to the direction of attentional orienting. Fixed connections and modulatory (bilinear) effects on connections are illustrated with dashed and solid arrows, respectively. Coupling parameters were positive for all fixed connections. Connections exhibiting significant (according to post hoc classical t tests) bilinear or modulatory effects are highlighted in color (red indicating significant negative modulatory effects and green indicating significant positive modulatory effects).