Pineal gland forms ?
Ans. is 'c' i.e., Posterior wall of thrid ventricleBoundries of third ventricle are :-Anterior wall : Lamina terminal, anterior commissure, anterior columns of fornix.Posterior wall : Pineal body, posterior commissure, cerebral aqueduct.Roof : Ependyma lining of under surface of tela choroidea of r ventricle. The choroid plexus of third ventricle projects downwards from roof.Floor : Optic chiasma, tuber cinereum, infundibulum (pituitary stalk), mammillary body, posterior perforated substance and tegmentum of midbrain.Optic recess is seen at the junction of floor with anterior wall.Lateral wall : Medial surface of thalamus, hypothalamus and hypothalamic nuclei. Interventricular foramen (of Monro) is seen at the junction of roof with anterior and lateral wall.
Floor of third ventricle
Anterior wall of third ventricle
Posterior wall of thrid ventricle
Roof of third ventricle