šThe triangles of the neck are the topographic areas of the neck bounded by the neck muscles. The sternocleidomastoid muscle divides the neck into the two major neck triangles; the anterior triangle and the posterior triangle of the neck, each of them containing a few subdivisions. šThe triangles of the neck are important because of their contents, as they house all the neck structures, including glands, nerves, vessels and lymph nodes. For that reason, this article will discuss the anatomy, borders and contents of the triangles of the neck. šTwo triangular areas found anterior and posterior to the sternocleidomastoid muscles which contain the visceral structures of the neck.