Das Joe M., Dossani Rimal H.
Imperial College Healthcare NHS Trust, London
Louisiana State Un Health Sciences Cr
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. 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 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 (see Cavum Septum Pellucidum). It contains a filtrate of cerebrospinal fluid transferred from the ventricles through the septal laminae, and it does not communicate with the subarachnoid space. 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. CSP and CV were respectively and incorrectly called the fifth and sixth ventricles in the past. 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. Superiorly - Inferior surface of the body of the corpus callosum Antero-inferiorly - Superior surface of the genu of the corpus callosum Posteroinferiorly - Corpus and columns of the fornix Laterally - Medial wall of frontal horns of lateral ventricles Medially - Virtual space with the contralateral septum Anteriorly - Genu of the corpus callosum Superiorly - Body of the corpus callosum Posteriorly - Anterior limb and pillars of the fornix Inferiorly - Anterior commissure and the rostrum of the corpus callosum and Laterally - Leaflets of the septum pellucidum. SP is an important part of the limbic system, with prominent connections to both the medial and the basolateral limbic circuit. Disease affecting the CSP can cause symptoms either by mass effect or by disturbance of the emotional and behavioral functions of the limbic system.
透明隔（拉丁语意为透明壁——SP），也称为西尔维于斯脑室，是一层薄的三角形双层膜，分隔大脑左右侧脑室的额角。它在胼胝体前部与穹窿体之间延伸，其宽度在1.5至3.0毫米之间变化。透明隔腔（CSP）是透明隔膜叶之间的潜在腔隙，间隔至少1毫米，被认为是一种正常的解剖变异（见透明隔腔）。它包含通过隔片从脑室转移来的脑脊液滤液，且不与蛛网膜下腔相通。有时，它可能与一个更靠后的腔隙即穹窿腔（CV）相连，但通过由穹窿柱形成的任意垂直平面彼此分开。CSP和CV过去曾分别被错误地称为第五和第六脑室。两者都不是脑室系统的一部分，因为它们有不同的胚胎起源且缺乏室管膜或脉络丛细胞衬里。上方——胼胝体的下表面；前下方——胼胝体膝部的上表面；后下方——穹窿体和柱；外侧——侧脑室额角的内侧壁；内侧——与对侧隔的虚拟空间；前方——胼胝体膝部；上方——胼胝体；后方——穹窿的前肢和柱；下方——前连合以及胼胝体的嘴；外侧——透明隔小叶。SP是边缘系统的重要组成部分，与内侧和基底外侧边缘回路都有显著联系。影响CSP的疾病可通过占位效应或边缘系统情感和行为功能紊乱引起症状。
