Ventricles and subarachnoid space of the brain (English)

Choroid plexus can be found in the floor of the lateral ventricles as well as the roofs of the third and fourth ventricles and functions to produce cerebrospinal fluid (CSF). CSF passes from the lateral ventricles to the third ventricle through the interventricular foramen (of Monro). From the third ventricle, CSF then flows through the cerebral aqueduct (of Sylvius) to the fourth ventricle. Once CSF reaches the fourth ventricle it passes into the subarachnoid space around the brain via three openings: the median aperture (of Magendie) which is received by the posterior cerebellomedullary cistern (a.k.a.cisterna magna); and the two lateral apertures (of Luschka), which drain into the cerebellopontine cisterns located at the cerebellopontine angle.