Question

Foramen of Magendie is
A. Another name of foramen of Monro
B. An aperture of myelocoel
C. An aperture of metacoel
D. An aperture of mesocoel

Answer 1

Hint: The foramen of Magendie is also called median aperture. It is a foramen present in the ventricular system that links the fourth ventricle and the cisterna magna. The cisterna magna is one out of the three openings present in the subarachnoid space between the arachnoid and pia mater layers of meninges surrounding the brain.

Complete answer:
This foramen is one of the three sites from where CSF can leave the fourth ventricle and can enter the subarachnoid space. This foramen of Magendie is located in the midline in the inferior aspect of the fourth ventricle.

> Option A- Another name of foramen of Monro: The foramen of Monro is a short channel between the lateral and third ventricles of the brain. But foramen of Magendie is not another name of foramen of Monro as the foramen of Magendie links fourth ventricle and cisterna magna.

> Option B- An aperture of myelocoel: Aperture of myelocele is not foramen of Magendie.

> Option C- An aperture of metacoel: The metacoel is the continuation from ventricle 4th of brain. The aperture that is present on the dorsal side is Foramen of Magendie. So, this is our correct answer. This foramen allow movement of CSF from ventricle to subarachnoid space.

> Option D – An aperture of mesocoel: Aperture of mesocoel is not correct because Foramen of Magendie actually aperture of metacoel not mesocoel.

Hence, the correct answer is option (C).

Note: There is one another foramen that is in relation with the Foramen of Magendie that is Foramen of Luschka. This foramen is a natural aperture present between the subarachnoid space and fourth ventricle.