Tuber Cinereum

**Definition:** Layer of GRAY MATTER in the HYPOTHALAMUS that also forms part of the floor of the THIRD VENTRICLE and merges anteriorly into the infundibulum (see PITUITARY GLAND, POSTERIOR).

**Tree numbers:** - A08.186.211.180.497.352.870 - A08.186.211.200.317.357.352.870