<p>Peak activity was located in the mid-cingulate cortex (MC above) (0, 2, 36, SVC). Another activation was in anterior cingulate cortex (AC above) (0, 34, 4 SVC). Both are shown in sagittal section (A). Parameter estimates for the three stimulus categories and for the three desirability classifications for MC (B) and for AC (C). The peak activity voxel in MC at 0, 2, 36 falls within the cluster of active voxels shown in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0003027#pone-0003027-g006" target="_blank">Fig 6B</a> which exhibit a quadratic relationship with desirability.</p