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Elsevier
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Inferior Root of Ansa Cervicalis
Nervous System

Inferior Root of Ansa Cervicalis

Radix inferior ansae cervicalis

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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.

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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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Complete Anatomy