has part has part has_part characteristic of has modifier abnormal hippocampal fimbria morphology increased hippocampal fimbria size enlarged hippocampal fimbria 2013-12-04T22:39:39Z MPheno.ontology greater 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 MP:0012465 abnormal increased size hippocampus fimbria