It is the cavity of diencephalon.
Also called the Mesencephalic duct or Cerebral Aqueduct.
It connects 3rd ventricle to the 4th Ventricle.
The normal mean cross sectional area of the Aqueduct at birth is o.5 mm with a range from 0.2 to 1.8 mm.
In Aqueductal stenosis the size of the aqueduct is focally reduced either at the level of the superior colliculus or at the level of inferior colliculus.
In CT the Aqueduct is usually not visualized and this is attributed for the "Partial volume effect"
1 comments:
oooooooooops!
read your blog carefully as students around both the hemisphere may take it as verbatim!
Third ventricle is the cavity of diencephalon, and aqueduct of sylvian is the cavity of mesencephalon-midbrain.
And it IS seen in most of todays good resolution CT scanners.
Post a Comment