Cerebral aqueduct (of Sylvius)

The cerebral aqueduct (of Sylvius) is the structure within the brainstem that connects the third ventricle to the fourth. It is located within the midbrain, surrounded by periacqueductal grey matter (PAG) with the tectum of midbrain located posteriorly and the tegmentum anteriorly.

It is filled with CSF and its obstruction leads to obstructive hydrocephalus with dilatation of the lateral and third ventricles only. 

Related pathology

See also


Neuroanatomy
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Article Information

rID: 5779
Section: Anatomy
Synonyms or Alternate Spellings:
  • Central aqueduct (of Sylvius)
  • Aqueduct of Sylvius
  • Cerebral aqueduct

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    Figure 1: ventricular system
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    Figure 2: brain (sagittal section)
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    Figure 3: midbrain (level of superior colliculi)
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