Submandibular Triangle: Anatomy And Clinical Notes

Submandibular Triangle: Anatomy And Clinical Notes

Describe the digastric (submandibular) triangle in brief.
Answer.

Boundaries

Anteroinferiorly: Anterior belly of digastric.

Posteroinferiorly: Posterior belly of digastric and stylohyoid.

Superiorly (base)

• Base of mandible
• An imaginary line, joining the angle of the mandible to the mastoid process

Floor: From anterior to posterior, it is formed by three muscles:

• Mylohyoid
• Hyoglossus
• Middle constrictor of the pharynx

Roof: It is formed by:

• Investing layer of the deep fascia enclosing the submandibular gland
• Superficial fascia containing:
  • Cervical branch of the facial nerve
  • Cutaneous branch of the great auricular nerve
  • Common facial vein

Contents