The process whose specific outcome is the progression of the medullary reticular formation over time, from its formation to the mature structure. The medullary reticular formation is a series of brain nuclei located in the medulla oblongata. [ http://www.brainspan.org http://en.wikipedia.org/wiki/Rhombencephalon GOC:curators GOC:dph GOC:dgh GOC:cjm GOC:cls GOC:jid http://purl.obolibrary.org/obo/go/references/0000021 ]