Question

Clogging of Magendie foramen will prevent the flow of cerebrospinal fluid from IVth ventricle to

• A. Central canal
• B. II-ventricle
• C. III-ventricle
• D. Outside the brain

Answer 1

The correct option is D Outside the brain

The foramen of Magendie (also called median aperture) is one of the foramina in the ventricular system and links the fourth ventricle and the quadrigeminal cistern. It is one of the three ways that CSF can leave the fourth ventricle and enter the subarachnoid space. The foramen of Magendie is the main path for the outflow of the cerebrospinal fluid from the ventricle. Occlusion of the foramen of Magendie (e.g., by a plexus ependymal cyst) can cause hydrocephalus.