Ansa cervicalis
| Ansa cervicalis | |
|---|---|
Ansa cervicalis. Superior root labeled as "descending hypoglossal", Inferior root labeled as "descending cervical".
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| Details | |
| Latin | Ansa cervicalis, ansa hypoglossi |
| Innervates | sternohyoid muscle, sternothyroid muscle, omohyoid muscle |
| Identifiers | |
| Dorlands /Elsevier |
a_44/12138601 |
| TA | Lua error in Module:Wikidata at line 744: attempt to index field 'wikibase' (a nil value). |
| TH | {{#property:P1694}} |
| TE | {{#property:P1693}} |
| FMA | {{#property:P1402}} |
| Anatomical terms of neuroanatomy
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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 triangle. Its name means "handle of the neck" in Latin.
Branches from the ansa cervicalis innervate most of the infrahyoid muscles, including the sternothyroid muscle, sternohyoid muscle, and the omohyoid muscle. Note that the thyrohyoid muscle, which is also an infrahyoid muscle, is innervated by cervical spinal nerve 1 via the hypoglossal nerve. In addition, the ansa cervicalis does not innervate the stylohyoid muscle, which is innervated by the facial nerve.
Roots
Two roots make up the ansa cervicalis.
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
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Slide1EBA.JPG
Muscles, arteries and nerves of neck.Newborn dissection.
See also
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
External links
- Anatomy figure: 25:03-08 at Human Anatomy Online, SUNY Downstate Medical Center
- Photo and description at Tufts University
- MedicalMnemonics.com: 1042
