Superior medullary velum

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Brain: Superior medullary velum
Gray701.png
Coronal section of the pons, at its upper part. (Ant. med. velum labeled at center top.)
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Anterior view of the cerebellum. (Ant. medullary velum labeled at center top.)
Latin velum medullare superius
Gray's p.793
NeuroNames hier-588
NeuroLex ID birnlex_1300
TA A14.1.05.007
FMA FMA:74508

The superior medullary velum (anterior medullary velum, valve of Vieussens) is a thin, transparent lamina 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.

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This article incorporates text from a public domain edition of Gray's Anatomy.