- Triangles of neck: paired triangular regions on each side of the neck, formed when the sternocleidomastoid divides the quadrilateral side of the neck into anterior and posterior triangles.
- Each major triangle is further subdivided by muscular landmarks into smaller named triangles.
Posterior Triangle
- Triangular space behind sternocleidomastoid; apex points upwards and backwards to the mastoid process, base lies downwards towards the clavicle.
boundaries and triangles, side of neck Boundaries and triangles, side of neck.