Posterior Triangle Of The Neck

Question 1

What is found on the roof of the posterior triangle ?

Answer 1

• skin
• superficial fascia
• platysma muscle
• investing fascia of the neck

Question 2

What is the anterior boundary of the posterior triangle ?

Answer 2

The posterior border of the sternocleidomastoid

Question 3

What is the posterior boundary of the posterior triangle ?

Answer 3

The anterior border of the trapezius

Question 4

What is the inferior boundary of the posterior triangle ?

Answer 4

The middle 3rd of the clavicle

Question 5

What is found on the floor of posterior triangle ?

Answer 5

The prevertebral muscles covered with the prevertebral layer of the deep cervical fascia

Question 6

Which muscles are on the floor of the posterior triangle ?

Answer 6

• splenius capitis
• levator scapulae
• scalene muscles
  • posterior scalene
  • middle scalene
  • anterior scalene

Question 7

What divides the posterior triangle into the occipital triangle and the supraclavicular triangle ?

Answer 7

The inferior belly of the omohyoid muscle

Question 8

What does cutaneous innervation mean ?

Answer 8

innervation to the skin

Question 9

What is the punctum nervosum ?

Answer 9

The nerve point of the neck

Question 10

Which nerves are involved in the cutaneous innervation of the neck ?

Answer 10

Great auricular nerve
Lesser occipital nerve
Accessory nerve (not part of cutaneous innervation)
Supraclavicular nerve
Transverse cervical nerve

Question 11

What is the cervical plexus ?

Answer 11

A network of nerves that supply the neck
It is formed by the anterior rami of the first 4 cervical spinal nerves (C1 to C4)

Question 12

Are the deep branches of the cervical plexus motor or sensory ?

Answer 12

Motor

Question 13

Are the superficial branches of the cervical plexus motor or sensory ?

Answer 13

Sensory

Question 14

Which superficial branches of the cervical plexus arise from C2 to C3 ?

Answer 14

• great auricular nerve
• lesser occipital nerve
• transverse cervical nerve

Question 15

Which superficial branch of the cervical plexus arises from C3 to C4 ?

Answer 15

Supraclavicular nerve

Question 16

What does the spinal accessory nerve supply ?

Answer 16

Trapezius and sternocleidomastoid

Question 17

What is the origin of the subclavian artery ?

Answer 17

Left subclavian artery = aortic arch
Right subclavian artery = brachiocephalic trunk

Question 18

What are the 5 main groups of the horizontal superficial nodes ?

Answer 18

• submental
• submandibular
• parotid (superficial and deep)
• retroauricular
• occipital

Question 19

What are the 2 main groups of the horizontal deep nodes ?

Answer 19

• retropharyngeal
• paratracheal, pretracheal, prelaryngeal and infrahyoid

Question 20

Which oral structures drain into the submandibular nodes ?

Answer 20

• maxillary teeth
• gingivae
• upper lip

Question 21

Which oral structure drains into the submental nodes ?

Answer 21

• lower lip

Question 22

Which oral structures drain into the deep cervical nodes ?

Answer 22

• mandibular teeth
• palatine tonsils

Question 23

Where does the tip of the tongue drain into ?

Answer 23

Drains into the submental nodes

Question 24

Where does the lateral anterior 2/3 of the tongue drain into ?

Answer 24

Submandibular nodes

Question 25

Where does the medial anterior 2/3 of tongue drain into ?

Answer 25

Deep cervical nodes

Question 26

Where does the posterior 1/3 of the tongue drain into ?

Answer 26

Retropharyngeal nodes

Question 27

Where does the brachial plexus arise from ?

Answer 27

The anterior rami of C5 to T1
Found between the anterior and middle scalene muscles