part of part of continuous with continuous with hippocampus fimbria hippocampal formation hippocampus alveus BIRNLEX:1510 alveus of the hippocampus CA2 alveus BAMS:alv SCTID:369094002 UBERON:0007639 MBA:466 HBA:9234 alveus alveus of hippocampus FMA:83867 neuraxis alveus Regional part of fornix consisting of a thin layer of white matter on the surface of the hippocampal formation, bordering the wall of the lateral ventricle and composed of white, myelinated fibers. The alveus arises from cell bodies in the subiculum and hippocampus, and eventually merges with the fimbria of the hippocampus. The fimbria goes on to become the fornix (MM: 2006-10-26). NCIT:C32058 BAMS:Alv alveus of fornix DHBA:10570 central nervous system cell part cluster central nervous system white matter layer