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Encyclopedia > Anterior triangle of the neck
Anterior triangle of the neck
The triangles of the neck. (Anterior triangles to the left; posterior triangles to the right.)
Side of neck, showing chief surface markings. (Nerves are yellow, arteries are red.)
Gray's subject #145 563

The anterior triangle is bounded, in front, by the middle line of the neck; behind, by the anterior margin of the Sternocleidomastoideus; its base, directed upward, is formed by the lower border of the body of the mandible, and a line extending from the angle of the mandible to the mastoid process; its apex is below, at the sternum. Image File history File links Gray512. ... Image File history File links No higher resolution available. ... In human anatomy, the sternocleidomastoid muscles are muscles in the neck that act to flex and rotate the head. ... The sternum (from Greek στέρνον, sternon, chest) or breastbone is a long, flat bone located in the center of the thorax (chest). ...


This space is subdivided into four smaller triangles by the Digastricus above, and the superior belly of the Omohyoideus below. The digastric muscle (named digastric as it has two bellies) is a small muscle located under the jaw. ... The omohyoid muscle is a muscle at the front of the neck that consists of two bellies separated by an intermediate tendon. ...


These smaller triangles are named:

The inferior carotid triangle (or muscular triangle), is bounded, in front, by the median line of the neck from the hyoid bone to the sternum; behind, by the anterior margin of the Sternocleidomastoideus; above, by the superior belly of the Omohyoideus. ... The superior carotid triangle (or carotid triangle), is bounded, behind by the Sternocleidomastoideus; below, by the superior belly of the Omohyoideus; and above, by the Stylohyoideus and the posterior belly of the Digastricus. ... The submandibular triangle (or submaxillary or digastric triangle) corresponds to the region of the neck immediately beneath the body of the mandible. ... The submental triangle (or suprahyoid triangle) is a division of the anterior triangle of the neck. ...

See Also

Posterior triangle of the neck The posterior triangle (or lateral cervical region) is bounded, in front, by the Sternocleidomastoideus; behind, by the anterior margin of the Trapezius; its base is formed by the middle third of the clavicle; its apex, by the occipital bone. ...


External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. Georgetown University is an elite private research university located in Georgetown, Washington, D.C., United States. ... The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ... An illustration from the 1918 edition Henry Grays Anatomy of the Human Body (or Grays Anatomy as it has more commonly become known) is an anatomy textbook widely regarded as a classic work on human anatomy. ...



 

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