Superior medullary velum

The superior medullary velum (anterior medullary velum) is a thin, transparent lamina of white matter which - together with the inferior medullary velum - forms the roof of the fourth ventricle. It extends between the two superior cerebellar peduncles. The lingula of cerebellum covers - and adheres to - its dorsal surface.[1]

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
Latinvelum medullare superius
NeuroNames593
NeuroLex IDbirnlex_1300
TA98A14.1.05.007
A14.1.05.719
TA25976
FMA74508
Anatomical terms of neuroanatomy

Anatomy

Relations

The superior medullary velum extends between the dorsomedial margins of the two superior cerebellar peduncles.[1] 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 frenulum veli, descends upon its upper part from between the inferior colliculi, and on either side of this the trochlear nerve emerges.

Blood supply

Blood is supplied by branches from the superior cerebellar artery.

Additional images
  • 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)
    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.
    Mesal aspect of a brain sectioned in the median sagittal plane.
  • Rhomboid fossa.
    Rhomboid fossa.
  • Human brain midsagittal view description
    Human brain midsagittal view description
  • Fourth ventricle. Posterioe view.Deep dissection.
    Fourth ventricle. Posterioe view.Deep dissection.

See also

References
  1. Waxman, Stephen G. (2009). Clinical Neuroanatomy (26th ed.). New York: McGraw-Hill Medical. p. 150. ISBN 978-0-07-160399-7.

Public domain This article incorporates text in the public domain from page 793 of the 20th edition of Gray's Anatomy (1918)


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