The Clinical Measurement Ontology (CMO), Measurement Methods Ontology (MMO), and Experimental Condition Ontology (XCO) are currently being developed at the Rat Genome Database. For more information about these vocabularies please see Shimoyama et al. Three ontologies to define phenotype measurement data. Front Genet. 2012;3:87. Epub 2012 May 28 or contact us (http://rgd.mcw.edu/contact/index.shtml).
The length of a line which crosses a transverse view of a cerebral artery, passing through its center and ending on either side at the inner surface of the blood vessel wall, after that measurement has been normalized or adjusted by a mathematical process or computation. The cerebral arteries are those which supply blood to the brain, more specifically, to the cerebrum.