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 crescent-shaped, ventrally located fold of the embryonic disc at the future cephalic end of the developing embryo; it constitutes the first body fold, and initiates brain, foregut and heart development
Comment:
Head fold is properly used to describe the rostrally located, crescent shaped fold of the embryonic disc around the future foregut. However, it is often (and incorrectly) used as a synonym for the ventrally located cephalic neural folds. Take care to select the correct term.