- Submandibular triangle
Submandibular triangle Submandibular triangle Side of neck, showing chief surface markings. (Nerves are yellow, arteries are red.) Latin trigonum submandibulare Gray's subject #145 564
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
It is bounded:
- above, by the lower border of the body of the mandible, and a line drawn from its angle to the mastoid process;
- below, by the posterior belly of the Digastricus; in front, by the anterior belly of the Digastricus.
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.
It is divided into an anterior and a posterior part by the stylomandibular ligament.
The anterior part contains the submandibular gland, superficial to which is the anterior facial vein, while imbedded in the gland is the external maxillary artery and its glandular branches.
Beneath the gland, on the surface of the Mylohyoideus, are the submental artery and the mylohyoid artery and nerve.
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 internal 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
Summary of contents
There 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 10 th cranial nerve ( Vagus Nerve )
- 5. The submandibular gland
- 6. The submandibular lymph nodes
- 7. The Facial artery and vein
- 8. The 12 th cranial nerve ( Hypoglossal Nerve )
- lesson5 at The Anatomy Lesson by Wesley Norman (Georgetown University) (necktriangle)
- lesson6 at The Anatomy Lesson by Wesley Norman (Georgetown University)
- SUNY Labs 25:16-0100
- SUNY Figs 25:01-01
- submandibular+triangle at eMedicine Dictionary
- Overview at bcm.edu
- Overview at howard.edu
Head Neck Thorax Abdomen/pelvis PerinealGeneral anatomy: systems and organs, regional anatomy, planes and lines, superficial axial anatomy, superficial anatomy of limbs
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