Summary

The ventricular system of the brain consists of four freely communicable, cerebrospinal fluid (CSF) -filled cavities: the two lateral ventricles, the third ventricle, and the fourth ventricle. This chapter discusses the size and shape of the cerebral ventricles. Using the ventricular cast method, the lengths of left and right lateral ventricles fell within the range 7.5-8.1 cm. The body of the lateral ventricles has almost rectangular shape. The occipital horn (OH) is the most inconsistent part of the lateral ventricles. The mean width of the third ventricle fell within the range 0.39-0.92 cm. The width of the fourth ventricle was within the range 1.02-1.64 cm. The width of the foramen of Magendie ranges from 5-8 mm. The distance between the anterior inferior cerebellar artery (AICA) and the foramina of Luschka ranges from 1.4 to 10 mm on the left side and from 1.2 to 8.8 mm on the right.

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