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Cerebral aqueduct

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Brain: Cerebral aqueduct
Section through superior colliculus showing path of oculomotor nerve.
Latin aqueductus mesencephali (cerebri)
Gray's subject #188 806
Part of
BrainInfo/UW hier-500
MeSH A08.

The cerebral aqueduct , also known as the aqueduct of Sylvius or the mesencephalic duct, is a canal containing cerebrospinal fluid (CSF), is within the mesencephalon (or midbrain) that connects the third ventricle in the diencephalon to the fourth ventricle, which is between the pons and cerebellum.


A blockage in this duct is a cause of hydrocephalus.

See also

Additional images

Mesencephalon (midbrain)

cerebral peduncle: midbrain tegmentum (periaqueductal gray, ventral tegmentum, nucleus raphe dorsalis), pretectum, substantia nigra, red nucleus, pedunculopontine nucleus, medial longitudinal fasciculus, medial lemniscus, rubrospinal tract, lateral lemniscus

tectum: corpora quadrigemina, inferior colliculi, superior colliculi

cerebral aqueduct: oculomotor nucleus, trochlear nucleus, Edinger-Westphal nucleus

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