Inferior medullary velum

Last revised by Francis Deng on 5 Mar 2020

The inferior (or posterior) medullary velum is a thin sheet of tissue formed by ependyma and the pia mater of the tela choroidea. It stretches from the middle cerebellar peduncles to the inferior cerebellar peduncles and across the midline to form the roof of the fourth ventricle along with the superior medullary velum. The nodule of the cerebellum is located just inferior and lateral to the inferior medullary velum.

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