Lecture5: Posterior Triangle Of The Neck

Question 1

What is the Origin of the sternomastoid?

Answer 1

Sternum and clavicle

Question 2

Where does the sternomastoid attach to at the skull?

Answer 2

The mastoid process

Question 3

What is the sternomastoid’s nerve supply?

Answer 3

Spinal accessory nerve XI

Question 4

What is Torticollis and what does it lead to?

Answer 4

It’s a sternomastoid spasm, leads to abnormal head posture

Question 5

Which pulse palpates along the sternomastoid?

Answer 5

Carotid pulse

Question 6

Which border of the sternomastoid does the carotid pulse palpate?

Answer 6

Anterior

Question 7

Where does the Platysma muscle lay?

Answer 7

In the superficial cervical fascia

Question 8

Where does the Platysma muscle obtain it’s innervation?

Answer 8

Facial nerve

Question 9

Which layer of the deep cervical fascia surrounds all the neck structures?

Answer 9

Investing Layer

Question 10

Where does the investing layer divide? (Between which 2 muscles?)

Answer 10

Trapezius and sternomastoid

Question 11

What does the pretracheal layer surround?

Answer 11

The thyroid gland and infrahyoid muscles

Question 12

What does the prevertebral layer surround?

Answer 12

The vertebral column and associated muscles

Question 13

What does the carotid sheath surround?

Answer 13

The neurovascular bundle of the neck

Question 14

What is the base of the posterior triangle?

Answer 14

Clavicle (middle 1/3)

Question 15

What is the apex of the posterior triangle?

Answer 15

The occipital bone

Question 16

What is the posterior border of the posterior triangle?

Answer 16

Trapezius

Question 17

What surrounds the posterior triangle anteriorly?

Answer 17

Sternomastoid

Question 18

What are the nerves of the posterior triangle?

Answer 18

Spinal accessory nerve, and branches of the brachial plexus nerve and trunks of it

Question 19

What are the vessels of the posterior triangle?

Answer 19

External jugular vein, and subclavian artery and vein