The posterior cord is a part of the brachial plexus. It consists of contributions from all of the roots of the brachial plexus.Brachial plexusPosterior cordPosterior cordBrachial plexus.Deep dissection.Brachial plexus.Deep dissection.Anterolateral view The posterior cord is a part of the brachial plexus. It consists of contributions from all of the roots of the brachial plexus. The posterior cord gives rise to the following nerves: MBBS resources http://mbbsbasic.googlepages.com/