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.)
Details
Identifiers
Latin	Trigonum cervicale anterius Trigonum colli anterius Regio cervicalis anterior
TA	A01.2.02.002
FMA	57777
Anatomical terminology []

The anterior triangle is a region of the neck.

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

Investing fascia covers the roof of the triangle while visceral fascia covers the floor.

Muscles:

2 Bellies of Digastric

Stylohyoid: by the facial nerve, by a branch from that to the posterior belly of digastric.

Mylohyoid: by its own nerve, a branch of the inferior alveolar ( from the mandibular division of trigemminal nerve), which arises just before the parent nerve enters the mandibular foramen, pierces the sphenomandibular ligament, and runs forward on the inferior surface of the mylohyoid, supplying it and the anterior belly of the digastric.

Geniohyoid: by a branch from the hypoglossal nerve consisting of fibres from the C1 nerve.

Sternohyoid, Omohyoid, Sternothyroid are supplied by Ansa cervicalis.

Thyrohyoid: by a branch of hypoglossal nerve but the fibres are all 'hitch-hiking' from C1.

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

These smaller triangles are named:

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.)

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