Sternothyroid muscle

The sternothyroid muscle, or sternothyroideus, is a muscle in the neck. It is shorter and wider than the sternohyoid muscle, beneath which it is situated.

Sternothyroid muscle
Sternothyroid visible center left
Section of the neck at about the level of the sixth cervical vertebra. Showing the arrangement of the fascia coli. (Sternothyroideus labeled at right, third from top.)
Details
OriginManubrium
InsertionThyroid cartilage
ArterySuperior thyroid artery
NerveAnsa cervicalis
ActionsDepresses thyroid cartilage
Identifiers
LatinMusculus sternothyroideus
TAA04.2.04.006
FMA13343
Anatomical terms of muscle

It arises from the posterior surface of the sternum, below the origin of the sternohyoid, and from the edge of the cartilage of the first rib, and sometimes that of the second rib, it is inserted into the oblique line on the lamina of the thyroid cartilage.

This muscle is in close contact with its fellow at the lower part of the neck, but diverges somewhat as it ascends; it is occasionally traversed by a transverse or oblique tendinous inscription.

Variations

Doubling; absence; accessory slips to Thyreohyoideus, Inferior constrictor, or carotid sheath.

Additional images
  • Superficial dissection of the right side of the neck, showing the carotid and subclavian arteries.
  • The fascia and middle thyroid veins.
  • Hypoglossal nerve, cervical plexus, and their branches.
  • Side view of the larynx, showing muscular attachments.
  • Sternothyroid muscle
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References

This article incorporates text in the public domain from page 393 of the 20th edition of Gray's Anatomy (1918)

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