The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories (ftp://ftp.informatics.jax.org/pub/reports/index.html). For more information about these ontologies, see the MGI Publications Page at http://www.informatics.jax.org/mgihome/other/publications.shtml.
any structural anomaly of any of the four paired muscles located in the anterior neck below the hyoid bone, within the muscular triangle; these muscles are long and flat in shape, similar to a belt or strap, and are responsible for depressing the hyoid during swallowing; they either originate from or insert on to the hyoid bone and include the sternohyoid, sternothyroid, thyrohyoid and omohyoid muscles