MCQ IN MEDICINE

Detailed explanation-1: -6.8). The only naturally occurring openings between the ventricles of the brain and the subarachnoid space surrounding the brain are the foramina of Luschka and Magendie in the fourth ventricle.

Detailed explanation-2: -The fourth ventricle communicates with the subarachnoid space through the lateral foramen of Luschka, located near the flocculus of the cerebellum, and through the median foramen of Magendie, located in the roof of the ventricle. Most of the CSF outflow passes through the medial foramen.

Detailed explanation-3: -The median aperture (foramen of Magendie) opens on midline into a subarachnoid space inferior to the cerebellum called the cisterna magna and into the quadrigeminal cistern in the region of the tectum of the midbrain. Two lateral apertures (foramen of Luschka) also open into the cisterna magna.

Detailed explanation-4: -The structure is also called the lateral aperture of the fourth ventricle or the foramen of Luschka after anatomist Hubert von Luschka. Animation showing the fourth ventricle (in red). The little points sticking out on the left and right are the two parts of the lateral recess, which end in the foramen of Luschka.