Anatomists use the term<unk>  to describe the divisions created by the major muscles in the region. The side of the<unk>  presents a somewhat quadrilateral outline, limited, above, by the lower border of the body of the mandible, and an imaginary line extending from the angle of the mandible to the mastoid process; below, by the upper border of the clavicle; in front, by the middle line of the<unk> ; behind, by the anterior margin of the trapezius. This space is subdivided into two large<unk>  by sternocleidomastoid, which passes obliquely across the<unk> , from the sternum and clavicle below, to the mastoid process and occipital bone above. The triangular space in front of this muscle is called the anterior<unk> ; and that behind it, the posterior<unk> . The anterior<unk> is further divided into muscular, carotid, submandibular and submental and the posterior into occipital and subclavian<unk> .
Triangles of the neck
Armstrong limit
Lockets
Elm yellows
Tophus
Tram track 
Saber shin
Hippus