FIG. 4.

Brain node and network activity related to accepting overcompensated offers in the UG and IG. (A) The left caudate, right thalamus and right cingulate cortex became relatively more active in unfair high offers (overcompensated offers) than in fair offers. This activation analysis included the trials from the UG and IG games. There was significant functional connectivity among these regions during unfair high offer trials. (B) There was not a significant connectivity pattern during fair offers. (C) The average BOLD signal changes in all of these regions were significantly different between the trials when the participants accepted overcompensated offers and the trials when they rejected these offers. (D) The directed functional connectivity pattern is significant at p<0.001 (with multiple comparisons corrections). The cingulate cortex receives a dominant information flow from the caudate and thalamus. Here, *p<0.05, **p<0.01. Color images available online at www.liebertpub.com/brain