Sternothyroid muscle

Musculus sternothyreoideus

  • Latin synonym: Musculus sternothyroideus
  • Related terms: Sternothyroid; Omohyoid (Superior belly); Omohyoid: Superior belly

Definition

Origin: Manubrium

Insertion: Thyroid cartilage

Nerve: Ansa cervicalis

Action: Elevates larynx, may slightly depress hyoid bone

Description:
The Sternothyreoideus (Sternothyroid muscle) is shorter and wider than the preceding muscle, beneath which it is situated. It arises from the posterior surface of the manubrium sterni, below the origin of the Sternohyoideus, 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.

This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).

Comparative anatomy in animals

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