Anterior medullary velum

Superior medullary velum
Coronal section of the pons, at its upper part. (Ant. med. velum labeled at center top.)
Anterior view of the cerebellum. (Ant. medullary velum labeled at center top.)
Details
Identifiers
Latin	velum medullare superius
NeuroNames	hier-588
NeuroLex ID	Superior medullary velum
Dorlands /Elsevier	v_05/12849304
TA	A14.1.05.007 A14.1.05.719
FMA	74508
Anatomical terms of neuroanatomy []

The superior medullary velum (anterior medullary velum, valve of Vieussens) is a thin, transparent of white matter, which stretches between the superior cerebellar peduncles; on the dorsal surface of its lower half the folia and lingula are prolonged.

It forms, together with the superior cerebellar peduncle, the roof of the upper part of the fourth ventricle; it is narrow above, where it passes beneath the facial colliculi, and broader below, where it is continuous with the white substance of the superior vermis.

A slightly elevated ridge, the fraenulum veli, descends upon its upper part from between the inferior colliculi, and on either side of this the trochlear nerve emerges.

Blood is supplied by branches from the superior cerebellar artery.

Scheme of roof of fourth ventricle. 1. Posterior medullary velum 2. Choroid plexus 3. Cisterna cerebellomedullaris of subarachnoid cavity 4. Central canal 5. Corpora quadrigemina 6. Cerebral peduncle 7. Anterior medullary velum 8. Ependymal lining of ventricle 9. Cisterna pontis of subarachnoid cavity (Arrow = Flow of cerebrospinal fluid (CSF) through foramen of Magendie)

Mesal aspect of a brain sectioned in the median sagittal plane.

Rhomboid fossa.

Human brain midsagittal view description

Fourth ventricle. Posterioe view.Deep dissection.

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)