Triangles of the Neck 2

Question 1

Identify number: 1, 2, 8, 11, 12

Answer 1

(1) Accessory Nerve

(2) Anterior belly of digastric

(8) Common corrupted artery

(11) External carotid artery

(12) External Laryngeal nerve

Question 2

Identify number: 16, 18, 19, 21, 22

Answer 2

(16) Great auricular nerve

(18) Hyoid bone

(19) Hypoglossal Nerve

(21) Inferior Belly of Omohyoid

(22) Internal Jugular Vein

Question 3

Identify number: 27, 30, 35, 37, 43

Answer 3

(27) Lingual Nerve

(30) Middle Thyroid Vein

(35) Parotid duct

(37) Posterior belly of digastric

(43) Sternocleidomastoid (cut)

Question 4

Identify number: 54, 60, 61, 63

Answer 4

(54) Superior belly of omohyoid

(60) Thyrohyoid membrane

(61) Trapezius

(63) Vagus nerve

Question 5

Identify Spinal accessory nerve.What does it supply? What is the action?

Answer 5

Number 1 on cadaver

• Trapezius: shrug the shoulder
• Sternomastoid: turns the head to the contralateral side

Question 6

Describe the surface anatomy of the spinal accessory nerve?

Answer 6

• The spinal accessory nerve crosses the posterior triangle of neck
• It crosses between the point of the junction between upper ⅓ and lower ⅔ of the sternomastoid to the junction between upper ⅔ and the lower ⅓ of the trapezius

Question 7

Identify great auricular nerve. What is its root value? what does it supply?

Answer 7

Number 16 on cadaver

C2,3

• Skin over the angle of the mandible
• Skin over the parotid gland
• Skin of the lower ½ of the auriclex