has part has part has_part characteristic of has modifier abnormal hippocampal commissure morphology increased hippocampal commissure size increased size of ventral hippocampal commissure enlarged triangular subcallosal plate of commissural fibers resulting from the converging of the right and left fornix bundles which exchange numerous fibers and which curve back in the contralateral fornix to end in the hippocampus of the opposite side increased size of hippocampal commissure increased size of commissure hippocampi increased size of commissure of fornix MPheno.ontology increased size of vhc increased size of hippocampus commissure increased size of delta fornicis enlarged hippocampal commissure increased size of commissure fornicis MP:0008224 abnormal increased size hippocampal commissure