Inferior Parietal Lobule

The inferior parietal lobule is a cortical area in the parietal lobe of the brain. It lies behind the postcentral gyrus and below the superior parietal lobule. The inferior parietal lobule consists of two gyri: 1) the supramarginal gyrus, which arches over the upturned end ot the lateral fissure; 2) the angular gyrus, arching over the upper end of the superior temporal sulcus.

The inferior parietal lobule projects fibers to the middle and inferior frontal gyri and vice versa. After considerable research, it has been found that the inferior parietal lobule is involved in decision making under uncertainty, showing higher activity when the decision was uncertain rather than certain and when humans were given trial-by-trial feedback on choice outcomes than when they were not.

Inferior Parietal Lobule