has part has part has_part characteristic of has modifier abnormal hippocampal fimbria morphology decreased hippocampal fimbria size reduced size of the flattened band of efferent fibers arising from the subiculum and medial border of the hippocampus, which then thickens to form the fornix and fibers of the hippocampal commissure csmith reduced hippocampal fimbria MP:0012466 MPheno.ontology reduced hippocampal fimbria size 2013-12-04T22:39:39Z abnormal decreased size hippocampus fimbria