Submandibular and Carotid Triangle

Submandibular Triangle (Digastric Triangle)

Borders of Submandibular triangel

An imaginary topographical triangle for purposes of location of its contents.

Borders:

• Superior - Inferior borders of the Mandible
• Anterior - Ant. belly of m. diagastricus
• Posterior - Post. belly of m. diagasticus
• Floor - m. mylohyoideus and m. hypoglossus
• Roof - Investing fascia

Submandibular triangle (borders and contents)

Contents:

1. Submandibular gland and duct
2. Facial artery and vein
3. Lingual artery and vein
4. Hypoglossal nerve
5. Submandibular lymph nodes

Carotid Triangle

Borders of the Carotid triangle

Borders:

• Superior - Post. belly of m. diagastricus
• Anterior - Sup. belly of m. omohyoideus
• Posterior - m. sternocleidomastoideus

Carotid triangle (Borders and contents)

Contents:

1. Internal Jugular vein
2. Bifurcation of the common carotid artery (at C4)
3. Deep cervical lymph nodes
4. Vagus nerve, hypoglossal nerve
5. Deep sympathetic chain