Anterior triangle of the neck

Anterior triangle of the neck
Anterior triangle
Side of neck, showing chief surface markings. (Nerves are yellow, arteries are red.)
Gray's	subject #145 563

The anterior triangle is a region of the neck.

Boundaries

The triangle is inverted with its apex inferior to its base which is under the chin.

	its apex Jugular notch in manubrium of the sternum
anteriorly Midline of the neck from chin to manubrium sterni		posteriorly by the anterior margin of the Sternocleidomastoideus
	its base (superiorly) by the lower border of the body of the mandible, and a line extending from the angle of the mandible to the mastoid process

Anatomy

• Muscles: Suprahyoid muscles and Infrahyoid muscles

Nerve supply

2 Bellies of Digastric

• Anterior: Mylohyoid nerve

• Posterior: Facial nerve

Development

• Anterior: 1st Pharyngeal arch

• Posterior: 2nd Pharyngeal arch

Divisions

This space is subdivided into four smaller triangles by the Digastricus above, and the superior belly of the Omohyoideus.

These smaller triangles are named:

• the muscular triangle
• the carotid triangle
• the submandibular triangle
• the submental triangle

Additional images

• 

  Sternocleidomastoid muscle

• 

  Muscles of the neck. Anterior view.

• 

  The triangles of the neck. (Anterior triangles to the left; posterior triangles to the right. Suprahyoid labeled at left.)

See also

Posterior triangle of the neck

External links

• lesson5 at The Anatomy Lesson by Wesley Norman (Georgetown University) (necktriangle)
• lesson6 at The Anatomy Lesson by Wesley Norman (Georgetown University)

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.