APA Dictionary of Psychology

a region of the forebrain that contains the septal nuclei and the septum pellucidum, which separates the lateral ventricles. The septal nuclei, which include the nucleus accumbens, form an integral part of the limbic system; they contribute fibers to the medial forebrain bundle and have interconnections with the amygdala, hippocampus, and regions of the hypothalamus. Functionality of this area includes pleasure generation and anger suppression.