Nerve: Ansa cervicalis
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
Dorlands / Elsevier	a_44/12138601

The ansa cervicalis (or ansa hypoglossi in older literature) is a loop of nerves that are part of the cervical plexus. This is a list of the subjects in Gray's Anatomy: IX Neurology The sternohyoid muscle is a thin narrow muscle attaching the Hyoid bone to the Sternum, one of the paired Strap muscles of the Infrahyoid muscles The Sternothyreoideus (or Sternothyroid muscle) is shorter and wider than the Sternohyoideus, beneath which it is situated The omohyoid muscle is a Muscle at the front of the Neck that consists of two bellies separated by an intermediate Tendon. Elsevier, the world's largest Publisher of Medical and Scientific literature, forms part of the Reed Elsevier group A nerve is an enclosed cable-like bundle of peripheral Axons (the long slender projections of Neurons. The cervical plexus is a Plexus of the Ventral rami of the first four Cervical spinal nerves which are located from C1 to C4 cervical segment in the

Branches from the ansa cervicalis innervate all but one of the infrahyoid muscles, including the sternohyoid muscle, the sternothyroid muscle, and the omohyoid muscle. The sternohyoid muscle is a thin narrow muscle attaching the Hyoid bone to the Sternum, one of the paired Strap muscles of the Infrahyoid muscles The Sternothyreoideus (or Sternothyroid muscle) is shorter and wider than the Sternohyoideus, beneath which it is situated The omohyoid muscle is a Muscle at the front of the Neck that consists of two bellies separated by an intermediate Tendon. The thyrohyoid muscle is innervated by C1 only. The Thyrohyoid muscle is a small quadrilateral muscle appearing like an upward continuation of the Sternothyreoideus.

Contents 1 Roots 2 See also 3 Additional Images 4 References 5 External links

Roots

Two roots make up the ansa cervicalis.

• Superior root of ansa cervicalis
• Inferior root of ansa cervicalis

See also

• ansa

Additional Images

Plan of the cervical plexus. The superior root of the ansa cervicalis is formed by a branch of Spinal nerve C1. The inferior root of the ansa cervicalis is formed by fibers from Spinal nerves C2 and C3.

The right brachial plexus with its short branches, viewed from in front.

Cervical plexus

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

• SUNY Figs 25:03-08
• Photo and description at Tufts University
• Mnemonic at medicalmnemonics.com 1042

The State University of New York Health Science Center at Brooklyn, better known as SUNY Downstate Medical Center, is an academic medical center and is the only one of its kind A mnemonic device (nəˈmɒnɪk is a Memory aid Commonly met mnemonics are often verbal something such as a very short poem or a special word used to help a person remember

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