Quick Facts
Origin: Anterior rami of the second and third cervical nerves.
Course: Descends in close approximation to internal jugular vein.
Branches: Muscular branches to infrahyoid muscles.
Supply: Inferior belly of omohyoid muscle and the sternohyoid and sternothyroid muscles.
Related parts of the anatomy
Origin
The inferior root originates directly from the anterior rami of the second and third cervical nerves.
Course
The inferior root descends medial or lateral to internal jugular vein. It unites with the superior root to form the ansa cervicalis.
Branches
The inferior root of the ansa cervicalis provides muscular branches to infrahyoid muscles.
Supplied Structures
The inferior root of the ansa cervicalis innervates the inferior belly of omohyoid, and the lower parts of sternohyoid and sternothyroid muscles.
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Ansa Cervicalis
The ansa cervicalis is a plexus of nerves that arise from the cervical plexus, formed by the anterior rami of the first four cervical nerves.
