Ansa cervicalis
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| Nerve: Ansa cervicalis | |
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| Ansa cervicalis. Superior root labeled as "descending hypoglossal", Inferior root labeled as "descending cervical". | |
| Gray's | subject #210 928 |
| Innervates | sternohyoid muscle, sternothyroid muscle, omohyoid muscle |
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. It does not innervate the thyrohyoid muscle, which receives its innervation from the ventral root of C1.
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[edit] Roots
Two roots make up the ansa cervicalis.
[edit] See also
[edit] Additional Images
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Plan of the cervical plexus.
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The right brachial plexus with its short branches, viewed from in front.
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Cervical plexus
[edit] References
- "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
[edit] External links
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