Inferior medullary velum

The inferior medullary velum (posterior medullary velum) is a thin layer of white substance, prolonged from the white center of the cerebellum, above and on either side of the nodule; it forms the infero-posterior part of the fourth ventricle.

Inferior medullary velum
Scheme of roof of fourth ventricle. The arrow is in the foramen of Majendie. 1: inferior medullary velum 2: Choroid plexus 3: Cerebellomedullary cistern of subarachnoid cavity 4: Central canal 5: Corpora quadrigemina 6: Cerebral peduncle 7: superior medullary velum 8: Ependymal lining of ventricle 9: Pontine cistern of subarachnoid cavity
Details
Identifiers
Latin	velum medullare inferius
NeuroNames	697
Anatomical terms of neuroanatomy [edit on Wikidata]

Somewhat semilunar in shape, its convex edge is continuous with the white substance of the cerebellum, while its thin concave margin is apparently free; in reality, however, it is continuous with the epithelium of the ventricle, which is prolonged downward from the posterior medullary velum to the taeniae.

See also

• Superior medullary velum

References

This article incorporates text in the public domain from page 794 of the 20th edition of Gray's Anatomy (1918)