The Common vein Copyright 2010
The foramen of Magendie (aka median aperture) is a single midline structure within the ventricular system of the brain which connects the fourth ventricle with the cerebellopontine cistern. It represents one of the three pathways that enable CSF to connect with the subarachnoid space. It lies posterior to the pons and anterior to the cerebellum.
Sagittal View of the Ventricles
The diagram in the sagittal projection reveals the horizontal portion called the lateral ventricle. It is a paired structure that houses the frontal horn, body, and the vertical portion which is composed of the 3rd ventricle, cerebral aqueduct and the 4th ventricle. The lateral ventricle consists of the frontal horn, body, occipital horn, atrium and the temporal horn The foramen of Monro connects the lateral ventricles with the third ventricle. The paired foramina of Luschka are sitiuated anteriorly in the 4th ventricle and they allow CSF to circulate in the subarachnoid spaces. The foramen of Magendie is a single structure and is situated posteriorly and it also enables CSF to enter the subarachnoid space.
Courtesy Ashley Davidoff MD copyright 2010 all rights reserved 94459b10b02.82s