Thyrohyoid branch
The thyrohyoid branch is a motor branch derived from the cervical plexus' formed by fibres of the cervical spinal nerve 1 (C1)' that join and travel with the hypoglossal nerve (cranial nerve XII)' to reach the suprahyoid region, branching away from CN XII distal to the superior root of ansa cervicalis', near the posterior border of the hyoglossus muscle. The thyrohyoid branch of ansa cervicalis innervates the thyrohyoid muscle.''''''