The Temporal , Parotid , Infratemporal and Submandibular regions

24.4 Submandibular region


This region lies deep to the body of the mandible , and is also called the suprahyoid region.




The main contents in this region include:-

  • submandibular and sublingual glands
  • lingual nerve and vessels
  • hypoglossal nerve
  • submandibular ganglion
  • suprahyoid muscles (digastric, stylohyoid, mylohyoid and geniohyoid)



submandibular gland

Consists of a large superficial part and a small deep part which are Continous with one another around the free posterior margin of mylohyoid.


  • Deep to and extending below body of mandible
  • Found in submandibular triangle
  • Extends to carotid triangle
  • Between two bellies of digastric muscle


Surfaces and relations

Superficial part has three surfaces:

Medial surface
Inferior or superficial surface:
Lateral Surface


  • Mylohyoid, and hyoglossus muscles,
  • Lingual nerve,
  • Hypoglossal nerve
  • Facial artery


  • Skin, Platysma, Investing fascia
  • facial vein
  • cervical and marginal mandibular branches of facial nerve


  • Body of mandible
  • Medial pterygoid
  • Facial artery
  • Masseter
The deep part extends forwards for a variable distance between the mylohyoid and hyoglosus, below the lingual nerve and above the hypoglossal nerve.

Submandibular duct of Wharton


  • Emerges from the superficial part of the gland near the posterior border of mylohyoid.

  • Runs with the deep part forwards and slightly upwards

  • Between the mylohyoid and hyoglossus

  • Between sublingual gland and genioglossus muscle~

  • Lies on hyoglossus

  • Crossed laterally by the lingual nerve


  • Floor of the mouth on the sublingual papilla beside the frenulum of the tongue

Blood supply  
  • Submandibular branches of facial artery and corresponding veins
Lymph drainage  
Submandibular lymph nodes
Nerve supply  


  • Preganglionic fibres superior salivary nucleus in the pons

  • Nervous intermedius, chorda tympani and lingual nerve.

  • Submandibular ganglion

  • Postganglionic fibres are direct to the gland

Sympathetic (vasoconstrictor) fibres come from the plexus around the facial artery.

General sensory: Lingual nerve

Sublingual gland  


  • In the submandibular region beneath the mucosa of the floor of the mouth

  • Occupies the sublingual fova

  • Above mylohyoid nerve






Medial :

  • Mucosa of tongue
  • Genio glossus muscle
  • Submandibular duct
  • Lingual nerve
  • Mandible
  • Inferior
  • Mylohyoid nerve
  • Genioglossus muscle
  • Its fellow
  • Deep part of submandibular gland



Blood supply
  • Sublingual artery- lingual
  • Submental artery- facial
  • Veins correspond to the arteries
Lymphatic drainage


  • Submandibular nodes
  • Submental nodes

Innervation See submandibular gland


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