The upper portion of the roof is formed by the cerebellum.
Roof 4th ventricle.
Median eminence is seen in the floor of the fourth ventricle.
The upper part of the roof is composed by a thin sheet of white matter the superior medullary velum that stretches between both superior cerebellar peduncles.
The fourth ventricle has a roof at its upper posterior surface and a floor at its lower anterior surface and side walls formed by the cerebellar peduncles nerve bundles joining the structure on the posterior side of the ventricle to the structures on the anterior side.
Tela choroidea of the the fourth ventricle.
The roof of fourth ventricle is the dorsal surface of the fourth ventricle.
In contrast to the superior roof the inferior roof of the fourth ventricle is formed mainly by two thin membranes the tela choroidea and the inferior medullary velum.
Inferior roof of the fourth ventricle.
The roof of the fourth ventricle has presents a tent like apex at the intersection of it s superior and inferior parts.
The apex of the tent goes posteriorly into the white core of the cerebellum.
This apex also known as the fastigium extends into the white core of the cerebellum.
The roof of ventricle is diamond shaped and can be divided into superior and inferior parts.
The roof of the 4th ventricle is tent shaped and has upper and lower sloping surfaces.
Taeniae with the obex.
The inferior medullary velum is all that remains of the connection between the nodule and flocculus.
Chaurasia 4th ed vol 3 pages 341 342.