Week 1 - Triangles of the Neck

Question 1

State the contents of the anterior triangle

Answer 1

Suprahyoid and infrahyoid muscles
Common carotid artery
IJV
CNs VII, IX, X, XI and XII

Question 2

State the borders of the carotid triangle

Answer 2

Superior - posterior belly of digastric
Lateral - SCM
Inferior - superior belly of omohyoid

Question 3

State the contents of the carotid triangle

Answer 3

Common carotid
IJV
CN XII and X

Question 4

Apart from the carotid triangle, what are the other 3 sub divisional triangles of the anterior triangle?

Answer 4

• Submental triangle
• Submandibular triangle
• Muscular triangle

Question 5

State the borders of the posterior triangle

Answer 5

Anterior - SCM
Posterior - Trapezius
Inferior - middle 1/3rd of clavicle

Question 6

What structures make up the roof and floor of the posterior triangle?

Answer 6

Roof - investing fascia

Floor - Prevertebral fascia

Question 7

State the contents of the posterior triangle

Answer 7

Muscles - omohyoid and vertebral
Vasculature - EJV, subclavian vein and distal part of subclavian artery
Nerves - CN XI, cervical plexus and trunks of the brachial plexus

Question 8

What is significant about the omohyoid muscle within the posterior triangle?

Answer 8

Its inferior belly splits it into 2 -

• Superior = occipital
• Inferior = subclavian

Question 9

State the borders of the anterior triangle

Answer 9

Medial - imaginary sagittal line down the midline
Lateral - SCM
Superior - inferior border of the mandible