|Nerve: Ansa cervicalis|
Ansa cervicalis. Superior root labeled as "descending hypoglossal", Inferior root labeled as "descending cervical".
|Latin||Ansa cervicalis, ansa hypoglossi|
|Innervates||sternohyoid muscle, sternothyroid muscle, omohyoid muscle|
Branches from the ansa cervicalis innervate most of the infrahyoid muscle, 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. Besides, the ansa cervicalis does not innervate the stylohyoid muscle, which is innervated by the facial nerve.
Two roots make up the ansa cervicalis.
- "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
- Anatomy figure: 25:03-08 at Human Anatomy Online, SUNY Downstate Medical Center
- Photo and description at Tufts University
- Mnemonic medicalmnemonics.com 1042