The Human Hypothalamus

Labeling Unlabeled Labeled Cell 1C2C3C4C5C6C Fiber 1F2F3F4F5F6F

6C: LEVEL 6 CELLS: Seen here are the large round medial mammillary nuclei, with small cells; lateral to these are the larger-celled lateral mammillary nuclei. The very darkly staining large cells near the junction of the medial and lateral mammillary nuclei may be histaminergic cells, such as those discovered in experimental animals, which have axons distributed widely throughout the brain. The more evenly distributed small cells of the posterior hypothalamic area lie dorsal to the mammillary nuclei.