Neck Anatomy

Question 1

What are the positions of the IJV and EJV relative to the sternocleidomastoid muscle?

Answer 1

IJV- Internal to SCM

EJV- External to SCM

Question 2

What are the two biggest branches of the external carotid artery?

Answer 2

Superficial temporal (up into temple, ant to ear)
Facial (comes up laterally just under mandible)

Question 3

What structures are supplied by external and internal carotid arteries?

Answer 3

External: Most of head and neck
Internal: Straight into brain (circle of willis)

Question 4

What are the four major structures of the carotid sheath?

Answer 4

Common carotid artery
Internal jugular vein
Vagus nerve
Deep cervical lymph nodes

Question 5

What are the 4 infrahyoid muscles? Which neck triangle are they found in?

Answer 5

Omohyoid, sternohyoid, sternothyroid & thyrohyoid
Muscular triangle (of ant triangle)

Question 6

What are the boundaries of the anterior neck triangle?

Answer 6

Sup: Inferior border of mandible
Post: Ant border of sternocleidomastoid
Ant: Midline of the neck

Question 7

What are the boundaries of the posterior neck triangle?

Answer 7

Inf: Middle 1/3 of clavicle
Post: Ant border trapezius
Ant: Posterior border of sternocleidomastoid

Question 8

Which structures form the floor and roof of the neck triangles?

Answer 8

Floor: Clavicle
Roof: Inferior border of the mandible

Question 9

What is the role of the infrahyoid muscles and what nerve innervates them?

Answer 9

They depress the hyoid bone

Innervated by ansa cervicalis (C1- C3)

Question 10

What sort of joint is the atlanto-axial joint?

Answer 10

Synovial condyloid (can move in two planes- biaxial)

Question 11

What type of joints exist between bodies of the cervical vertebrae?

Answer 11

Synovial cartilaginous joints