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 the subclasses of motor neurons which are organized into longitudinally oriented columns that occupy distinct and, in some cases, discontinuous domains along the rostrocaudal axis of the spinal cord; motor neurons within a single column send their axons to a common peripheral target