Definition of aqueduct of Sylvius in English:

aqueduct of Sylvius


  • A fluid-filled canal which runs through the midbrain connecting the third and fourth ventricles.

    Also called cerebral aqueduct
    • ‘In the midbrain, the aqueduct of Sylvius was slitlike.’
    • ‘Subsequent magnetic resonance imaging revealed a mass measuring 5 x 4 x 4.1 cm in the region of the pineal gland and obstructing the aqueduct of Sylvius with resultant hydrocephalus.’
    • ‘Coronal sectioning of the brain revealed mild enlargement of the lateral and third ventricles and the aqueduct of Sylvius.’
    • ‘From this midline cavity, CSF continues through the aqueduct of Sylvius into the fourth ventricle, situated within the posterior fossa.’
    • ‘Consequently, hydrocephalus develops due to blockage of CSF outflow at the level of the aqueduct of Sylvius or the basal cisterns.’


aqueduct of Sylvius