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.
abnormal narrowing or constriction of the large orifice in the occipital bone through which the spinal cord passes to the cranial cavity and becomes continuous with the medulla oblongata
Synonyms:
exact_synonym:
constricted foramen magnum; great foramen stenosis; narrow foramen magnum; narrowed foramen magnum