The<unk> es are a pair of small round bodies, located on the undersurface of the brain, that form part of the limbic system.  They are located at the ends of the anterior arches of the fornix, and are named<unk>  for their resemblance to two breasts.  They consist of two groups of nuclei, the medial<unk>  nuclei and the lateral<unk>  nuclei.Neuroanatomists have often categorized the<unk> es as part of the hypothalamus.
Mammillary body
Caudate nucleus
Gracile nucleus
Cuneate nucleus
Area postrema
Zona reticularis
Periaqueductal gray
Ventral tegmentum