Page 14 - SONO 260 The Fetal Head and Brain

The Ventricular System
— Choroid plexus may also be found in the roof of the third and fourth ventricles. Each lateral ventricle communicates with the third ventricle in the midline of the
brain at the foramen of Monro, or the paired interventricular foramina.
— The third ventricle is located between the two lobes of the thalamus.
— Essentially, part of the thalamus, the interthalamic adhesion, passes through the third ventricle and can be visualized when enlarged or surrounded by cerebrospinal fluid.
— The third ventricle connects to the fourth ventricle inferiorly by means of a long, tubelike structure called the aqueduct of Sylvius, or the cerebral aqueduct.