View source for Submandibular triangle

{{Infobox anatomy
| Name        = Submandibular triangle
| Latin       = trigonum submandibulare
| Image       = Musculi coli base, my edits for tringles, labeled triangles, Submandib.svg
| Caption     = Submandibular triangle
| Image2      = Gray1210.png
| Caption2    = Side of neck, showing chief surface markings. (Nerves are yellow, arteries are red.)
| System      =
}}
The '''submandibular triangle''' (or '''submaxillary ''' or '''digastric triangle''') corresponds to the region of the neck immediately beneath the body of the [[Human mandible|mandible]].

==Boundaries and coverings==
It is bounded:<ref>{{Citation |last=Casale |first=Jarett |title=Anatomy, Head and Neck, Submandibular Triangle |date=2022 |url=http://www.ncbi.nlm.nih.gov/books/NBK534833/ |work=StatPearls |place=Treasure Island (FL) |publisher=StatPearls Publishing |pmid=30521254 |access-date=2023-01-19 |last2=Varacallo |first2=Matthew}}</ref>
* ''above'', by the lower border of the body of the [[Human mandible|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 [[Mylohyoid muscle|Mylohyoideus]] anteriorly, and by the [[hyoglossus]] posteriorly.

==Triangles==
*[[Beclard Triangle]]
*[[Lesser Triangle]]
*[[Pirogoff Triangle]]

==Divisions==
It is divided into an anterior and a posterior part by the [[stylomandibular ligament]].{{Citation needed|reason=It does not make anatomical sense, and there are no resources that mention a structure that divides the two divisions of the Submandibular triangle.|date=March 2020}}

===Anterior part===
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 [[Mylohyoid muscle|Mylohyoideus]], are the [[submental artery]] and the [[mylohyoid artery]] and nerve.

===Posterior part===
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 artery|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==
* [[Anterior triangle of the neck]]
* [[Submandibular space]]

==Additional images==
<gallery>
 File:Gray1194.png|Anterolateral view of head and neck.
 File:Gray512.svg|The triangles of the neck. (Anterior triangles to the left; posterior triangles to the right. Suprahyoid labeled at left.)
</gallery>

==Summary of contents==
The following summarizes the important structures found in the submandibular triangle:
* [[Submandibular gland]]

* [[Facial artery]] (cervical section) with branches
# [[Submental artery]]
# [[Ascending palatine artery]]
# Glandular branches to the submandibular branch
# Tonsillar branch to palatine tonsil 

* [[Facial vein]]
* [[Lingual artery]]
* [[Lingual vein]]
* [[Submandibular lymph nodes]]
* [[Submandibular ganglion]]
* [[Hypoglossal Nerve]] CN XII
* [[Lingual nerve]]
* [[Mylohyoid nerve]]
* [[Cervical branch of the facial nerve]]


==References==
{{Gray's}}
<references />

==External links==
* {{NormanAnatomy|lesson5}} ({{NormanAnatomyFig|necktriangle}})
* {{NormanAnatomy|lesson6}}
* {{SUNYAnatomyLabs|25|16|01|00}}
* {{SUNYAnatomyFigs|25|01|01}}
* [https://web.archive.org/web/20080517165214/http://www.bcm.edu/oto/studs/anat/neck.html Overview at bcm.edu]
* [http://www.med.howard.edu/anatomy/gas/wk7/Lecture%2021.htm Overview at howard.edu]

{{Superficial anatomy}}
{{Portal bar|Anatomy}}
{{Authority control}}

[[Category:Human head and neck]]
[[Category:Triangles of the neck]]