Mammalian Phenotype Ontology, showing details for the term “opisthotonus” [MP:0002880]. Left, MGI Browser display shows the term name, common synonyms, the MP ID and the term definition. Each term is followed by a link indicating the number of genotypes and annotations to the term or any children of the term in MGI. The term path is displayed as a hierarchical tree. Note that since there are two paths to the term “opisthotonus”, each path appears as a unique hierarchical tree. Right, a graphical representation for the term “opisthotonus”. The two paths from the term to the top of the ontology can be seen.