part of part of innervates develops from nerve hypoglossal nerve cervical nerve plexus ansa cervicalis EHDAA2:0000124 EHDAA:6669 SCTID:362474000 A loop of nerves that are part of the cervical plexus that lies superficial to the internal jugular vein in the carotid sheath. Branches from the ansa cervicalis innervate three of the four infrahyoid muscles, including the sternohyoid muscle, the sternothyroid muscle, and the omohyoid muscle. ansa hypoglossi BAMS:ancer Wikipedia:Ansa_cervicalis UBERON:0005430 ansa cervicalis FMA:55142 infrahyoid muscle