Tuber cinereum

The tuber cinereum is a hollow eminence of gray substance situated between the corpora mammillaria behind, and the optic chiasma in front.

Laterally it is continuous with the anterior perforated substances and anteriorly with a thin lamina, the lamina terminalis.

From the under surface of the tuber cinereum a hollow conical process, the infundibulum, projects downward and forward and is attached to the posterior lobe of the hypophysis.