Ant/Post Triangle TA Review

Question 1

Where is the adam’s apple?

Answer 1

C4/C6 (Thyroid Cartilage)

Question 2

What level is the angle of the mandible?

Answer 2

C2

Question 3

What level is the cricoid cartilage?

Answer 3

C6

Question 4

What level is the hyoid bone?

Answer 4

C3

Question 5

C1/C2 ligaments

Which ligament prevents excessive rotation?

Answer 5

The Alar ligament

Question 6

C1/C2 ligaments

Which ligament prevents anterior displacement of the atlas on the axis?

Answer 6

The transverse ligament

Question 7

What does -omo mean?

Answer 7

Shoulder

Question 8

What form the boundaries of the carotid triangle?

Answer 8

Anterior: posterior belly of digastric
Posterior: Ant edge of SCM
Inferior: superior belly of omohyoid

Question 9

What innervates the anterior belly of digastric and the mylohyoid muscles?

Answer 9

V3 (nerve to mylohyoid, a branch off the inferior alveolar nerve)

Question 10

What innervates the stylohyoid and posterior belly of digastric muscles?

Answer 10

CN VII (cervical branch)

Question 11

Where is the geniohyoid muscle and what innervates it?

Answer 11

• Its superior to the mylohyoid

- Innervated by C1 ventral primary rami via XII (hypoglossal

Question 12

What supplies motor innervation to the infrahyoid muscles?

What is the exception?

Answer 12

Ansa cervicalis supplies motor innervation to the infrahyoid muscles EXCEPT thyrohyoid which is supplied by C1 via CN XII (hypoglossal)

Question 13

What else in this region is supplied by the cervical branch of CN VII

Answer 13

The platysma muscle (makes sense as it is a muscle of facial expression)