innervates innervates neuron projection bundle spinal nerve plexus brachial nerve plexus Wikipedia:Brachial_plexus FMA:5906 UBERON:0001814 EHDAA:3782 MA:0001180 NCIT:C12682 EMAPA:16988 MESH:D001917 An arrangement of nerve fibers, running from the spine where it proceeds through the neck then the axilla and into the arm where it innervates skin and muscle. [WP,modified]. GAID:842 brachial plexus EHDAA2:0000180 VHOG:0000372 SCTID:181002002 forelimb