Anterior triangle of the neck

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

by the lower border of the body of the mandible, and a line extending from the angle of the mandible to the mastoid process

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 below.

These smaller triangles are named:

* the muscular triangle
* the carotid triangle
* the submandibular triangle
* the submental triangle