All are seen in the floor of 3rd ventricles except (AIIMS May 2013)
• Oculomotor nerve is not in the floor of 3rd ventricle, it passes under the floor, quite far below.
• The anterior part of the floor of the third ventricle is formed mainly by hypothalamic structures.
• Immediately behind the optic chiasma lies the thin infundibular recess, which extends into the pituitary stalk.
• Behind this recess, the tuber cinereum and the mammillary bodies form the floor of the ventricle.