part of part of septum of telencephalon massa praecommissuralis EMAPA:32837 UMLS:C0752060 septum pellucidum (BNA,PNA) Subdivision of the telencephalon on the midline between the lateral ventricles which contains the septum pellucidum and the septal nuclei[FMA][FMA:61842]. BAMS:SA BTO:0002705 Gray matter structure located on the midline of the forebrain consisting of the septum pellucidum (in some species) and the septal nuclei (Heimer, 1996). septum (NN) septum telencephali BAMS:Spt BIRNLEX:963 UBERON:0000446 septum septal region telencephalon septum BM:Tel-Spt area septalis neuronames:255 BAMS:SEP BAMS:Sep septal area MA:0000924 FMA:61842 Se cerebral hemisphere cerebral hemisphere gray matter