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 degeneration or destruction of the myelin sheath that results in the partial absence or patchy, incomplete area of a myelin sheath over all or part of an axon or fiber tract
Comment:
Demyelination is a term used to describe the destruction of the myelin sheath that surrounds axonal fibres. This is caused by diseases that damage the myelin sheath or the cells that form it.