part of part of innervates innervates arm axillary nerve NCIT:C52817 Wikipedia:Axillary_nerve auxillery nerve EMAPA:18802 The axillary nerve is a nerve of the human body, that comes off the posterior cord of the brachial plexus at the level of the axilla (armpit) and carries nerve fibers from C5 and C6. The axillary nerve travels through the quadrangular space with the posterior circumflex humeral artery and vein. [WP,unvetted]. circumflex nerve circumflex humeral nerve FMA:37072 UBERON:0001493 MA:0001166 SCTID:181009006 brachial nerve plexus arm nerve axilla