part of part of adjacent to adjacent to luminal space of anatomical space lamina of septum pellucidum septum pellucidum cavum septum pellucidum http://upload.wikimedia.org/wikipedia/commons/7/7d/CavumSeptumPellucidumDiagram.jpg A space enclosed within the laminae of the septum pelludicum, the membranous partition that seperates the frontal horns of the ventricle. contains cerebrospinal fluid (CSF) that filters from the ventricles through the septal laminae. bounded anteriorly by the genu of the corpus callosum; superiorly by the body of the corpus callosum; posteriorly by the anterior limb and pillars of the fornix; inferiorly by the anterior commissure and the rostrum of the corpus callosum; and laterally by the leaflets of the septum pellucidum. septum pellucidum cave FMA:61874 UBERON:0009857 fifth ventricle Wikipedia:Cave_of_septum_pellucidum SCTID:180933005 BTO:0003447 In humans, present in 100% of fetuses, but over 85% of them fuse by 3-6 months after birth DHBA:12099 BAMS:CSP NCIT:C32602 cavum of septum pellucidum ventriculus septi pellucidi cave of septum pellucidum cavum septi pellucidi UMLS:C0228158 neuronames:257