has part has part has_part characteristic of part of has modifier abnormal temporal lobe morphology abnormal hippocampus morphology abnormal hippocampal region MP:0000807 any structural anomaly of the deep lying structure of the cerebrum involved with memory storage and spatial navigation hippocampal defects abnormal hippocampus region The synonym abnormal hippocampal formation is a frequently used synonym in the literature for the hippocampus. It is unfortunate that it implies a developmental process. There is also a lack of consensus relating to terms describing the hippocampus and/or the adjacent cerebral cortex with the term hippocampus sometimes referring to the hippocampal formation (or region) and sometimes only to the Ammon gyrus (Ammon's horn). In this ontology, we have used hippocampus to mean the entire formation (region). MP:0000806 abnormal hippocampus hippocampus dysplasia abnormal hippocampal formation morphology MPheno.ontology MP:0000810 abnormal limbic system morphology morphology abnormal hippocampal formation