Ansa cervicalis

Ansa cervicalis
Ansa cervicalis
	Ansa cervicalis. Superior root labeled as "descending hypoglossal," Inferior root labeled as "descending cervical."
Details
Innervates	Sternohyoid muscle,; sternothyroid muscle,; omohyoid muscle
Identifiers
Latin	ansa cervicalis,; ansa hypoglossi
TA98	A14.2.02.013
TA2	6376
FMA	55142
	Anatomical terms of neuroanatomy [edit on Wikidata]

The ansa cervicalis (or ansa hypoglossi in older literature^{[citation needed]}) is a loop formed by muscular branches of the cervical plexus formed by branches of cervical spinal nerves C1-C3. The ansa cervicalis has two roots - a superior root (formed by branch of C1) and an inferior root (formed by union of branches of C2 and C3) - that unite distally, forming a loop. It is situated within the carotid sheath.^[1]^: 334

Branches of the ansa cervicalis innervate three of the four infrahyoid muscles: the sternothyroid, sternohyoid, and omohyoid muscles (note that the thyrohyoid muscle is the one infrahyoid muscle not innervated by the ansa cervicalis - it is instead innervated by cervical spinal nerve 1 via a separate thyrohyoid branch^[2]^{: 582, 600}).

Its name means "handle of the neck" in Latin.^{[citation needed]}

^ Sinnatamby, Chummy S. (2011). Last's Anatomy (12th ed.). Elsevier Australia. ISBN 978-0-7295-3752-0.
^ Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42nd ed.). New York. ISBN 978-0-7020-7707-4. OCLC 1201341621.{{cite book}}: CS1 maint: location missing publisher (link)

[:022-1] Sinnatamby, Chummy S. (2011). Last's Anatomy (12th ed.). Elsevier Australia. ISBN 978-0-7295-3752-0.

[:224-2] Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42nd ed.). New York. ISBN 978-0-7020-7707-4. OCLC 1201341621.{{cite book}}: CS1 maint: location missing publisher (link)

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