part of part of in taxon results in formation of anatomical entity hindbrain formation medulla oblongata morphogenesis medulla oblongata formation myelencephalon formation GO:0021580 The process that gives rise to the medulla oblongata. This process pertains to the initial formation of a structure from unspecified parts. The medulla oblongata lies directly above the spinal cord and controls vital autonomic functions such as digestion, breathing and the control of heart rate. medulla biosynthesis medulla formation myelencephalon biosynthesis anatomical structure formation involved in morphogenesis Vertebrata <vertebrates> medulla oblongata