Ansa cervicalis

Ansa Cervicalis

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Ansa cervicalis

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The ansa cervicalis (or ansa hypoglossi in older literature) is a loop of nerves that are part of the cervical plexus. It lies superficial to the internal jugular vein in the carotid sheath.

Branches from the ansa cervicalis innervate three of the four infrahyoid muscles: the sternohyoid muscle, the sternothyroid muscle, and the omohyoid muscle.


Two roots make up the ansa cervicalis.

See also

Additional Images

Image:Gray804.png|Plan of the cervical plexus.
Image:Gray808.png|The right brachial plexus with its short branches, viewed from in front.
Image:Cervical plexus.gif|Cervical plexus


  • "Ansa cervicalis." Stedman's Medical Dictionary, 27th ed. (2000). ISBN 0-683-40007-X
  • Gray's Anatomy: The Anatomical Basis of Clinical Practice. (2005). ISBN 0-443-07168-3

External links

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