Ventricles and subarachnoid space of the brain (Latin)

The plexus chorioideus can be found in the floor of the ventriculus lateralis as well as the roofs of the ventriculus tertius and ventriculus quartus and functions to produce cerebrospinal fluid (CSF, Liquor cerebrospinalis). CSF passes from the ventriculus lateralis to the ventriculus tertius through the foramen interventriculare. From the ventriculus tertius, CSF then flows through the aqueductus cerebri to the ventriculus quartus. Once CSF reaches the ventriculus quartus, it passes into the spatium subarachnoidale around the brain via three openings: the apertura mediana (of Magendie) which is received by the cisterna cerebellomedullaris posterior (a.k.a.cisterna magna); and the two aperturae laterales (of Luschka), which drain into the cisternae pontocerebellares located at the angulus pontocerebellaris.