Submandibular triangle

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Submandibular triangle
Musculi coli base, my edits for tringles, labeled triangles, Submandib.svg
Submandibular triangle
Side of neck, showing chief surface markings. (Nerves are yellow, arteries are red.)
Latin trigonum submandibulare
TA A01.2.02.003
FMA 57779
Anatomical terminology

The submandibular triangle (or submaxillary or digastric triangle) corresponds to the region of the neck immediately beneath the body of the mandible.

Boundaries and coverings[edit]

It is bounded:

It is covered by the integument, superficial fascia, Platysma, and deep fascia, ramifying in which are branches of the facial nerve and ascending filaments of the cutaneous cervical nerve.

Its floor is formed by the Mylohyoideus anteriorly, and by the hyoglossus posteriorly.



It is divided into an anterior and a posterior part by the stylomandibular ligament.

Anterior part[edit]

The anterior part contains the submandibular gland, superficial to which is the anterior facial vein, while imbedded in the gland is the facial artery and its glandular branches.

Beneath the gland, on the surface of the Mylohyoideus, are the submental artery and the mylohyoid artery and nerve.

Posterior part[edit]

The posterior part of this triangle contains the external carotid artery, ascending deeply in the substance of the parotid gland

This vessel lies here in front of, and superficial to, the external carotid, being crossed by the facial nerve, and gives off in its course the posterior auricular, superficial temporal, and internal maxillary branches: more deeply are the internal carotid, the internal jugular vein, and the vagus nerve, separated from the external carotid by the Styloglossus and Stylopharyngeus, and the hypoglossal nerve

See also[edit]

Additional images[edit]

Summary of contents[edit]

The following summarizes the important structures found in the submandibular triangle:

  • 1. The external and internal carotid artery
  • 2. The internal jugular vein
  • 3. The deep cervical lymph nodes
  • 4. The 10th cranial nerve ( Vagus Nerve )
  • 5. The submandibular gland
  • 6. The submandibular lymph nodes
  • 7. The Facial artery and vein
  • 8. The 12th cranial nerve ( Hypoglossal Nerve


This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

External links[edit]