Triangles of the neck

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Triangles of the neck

The triangles of the neck. (Anterior triangles to the left; posterior triangles to the right.)

Side of neck, showing chief surface markings. (Nerves are yellow, arteries are red.)
Gray's	subject #145 563

Anatomists use the term triangles of the neck to describe the divisions created by the major muscles in the region.

The side of the neck 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 neck; behind, by the anterior margin of the Trapezius.

This space is subdivided into two large triangles by the Sternocleidomastoideus, which passes obliquely across the neck, 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 triangle of the neck; and that behind it, the Posterior triangle of the neck.

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Norman/Georgetown lesson6

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

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General anatomy of head and neck

HEAD: Face/Occiput: Forehead – Eye – Ear – Temple - Cheek – Chin

External nose: Nostril - Nasal septum - Cartilages (Accessory nasal, of the septum, Greater alar, Lateral nasal, Lesser alar, Vomeronasal) - Olfactory glands

Nasal cavity: Choana - Turbinate - Sphenoethmoidal recess - Ethmoid bulla - Hiatus semilunaris - Ostium maxillare - Inferior meatus - Vomeronasal organ - Paranasal sinus

Mouth/oral cavity: Lip - Philtrum - Jaw - Pterygomandibular raphe

Teeth: Permanent (Incisor - Canine, Premolar, Molar) - Deciduous

Tongue: Plica fimbriata - Median sulcus - Foramen cecum - Terminal sulcus - Frenulum linguae - Anterior tongue - Posterior tongue

Palate/roof of mouth: Hard palate, Soft palate - Palatine raphe - Incisive papilla - Uvula - Pharyngeal recess - Arches: (Palatoglossal, Palatopharyngeal)

Salivary glands: (Parotid - Sublingual - Submandibular) - Ducts: Submandibular - Parotid

Masseteric fascia - Temporal fascia - Galea aponeurotica - Scalp

NECK: Throat – Pharynx - Larynx