Another pictures:
Description:
Triangular recess - the part of third ventricle between anterior commissure and columns of fornix.
Roof of the third ventricle Anterior wall of the third ventricle Floor of the third ventricle Posterior wall of the third ventricle Lateral walls of the third ventricle Triangular recess Supra-optic recess Infundibular recess Pineal recess Suprapineal recess Interventricular foramen (foramen of Monroi) Mesencephalic aqueduct