Posterior triangle of the neck

The posterior triangle (or lateral cervical region) is a region of the neck.

The posterior triangle has the following boundaries:

Apex: Union of the sternocleidomastoid and the trapezius muscles at the superior nuchal line of the occipital bone

Anteriorly: Posterior border of the sternocleidomastoideus

Posteriorly: Anterior border of the trapezius

Inferiorly: Middle one third of the clavicle

Roof: Investing layer of the deep cervical fascia

Floor: (From superior to inferior)