Inferiorly - Anterior commissure and the rostrum of the corpus callosum and Posteriorly - Anterior limb and pillars of the fornix Medially - Virtual space with the contralateral septum Laterally - Medial wall of frontal horns of lateral ventricles Posteroinferiorly - Corpus and columns of the fornix Superiorly - Inferior surface of the body of the corpus callosumĪntero-inferiorly - Superior surface of the genu of the corpus callosum Both are not parts of the ventricular system as they have a different embryological origin and lack a lining with ependymal or choroid plexus cells.
CSP and CV were respectively and incorrectly called the fifth and sixth ventricles in the past. Sometimes, it may connect to a more posterior cavity called cavum vergae (CV), but separates from each other by an arbitrary vertical plane formed by the columns of the fornix. It contains a filtrate of cerebrospinal fluid transferred from the ventricles through the septal laminae, and it does not communicate with the subarachnoid space. The cavum septum pellucidum (CSP) is a potential cavity between the membranous leaves of the septum pellucidum, separated by at least 1 mm, and is considered a normal anatomical variation. It extends between the anterior portion of the corpus callosum, and the body of the fornix and its width varies from 1.5 to 3.0 mm The septum pellucidum (meaning translucent wall in Latin - SP), also known as the ventricle of Sylvius, is a thin, triangular double membrane separating the frontal horns of the right and left lateral ventricles of the brain. This activity reviews the cause and presentation of cavum septum pellucidum and stresses the importance of an interprofessional team in its management. It extends between the anterior portion of the corpus callosum and the body of the fornix, and its width varies from 1.5 to 3.0 mm.