4.3 The Cervical Plexus Flashcards Preview

Semester 4- Head and Neck > 4.3 The Cervical Plexus > Flashcards

Flashcards in 4.3 The Cervical Plexus Deck (21):
1

What is the cervical plexus?

Network of nerve fibres which innervates some structures in the head and neck

2

Where is the cervical plexus located?

Posterior triangle of the neck
Prevertebral layer of fascia

3

Which spinal roots make up the cervical plexus?

C1-4

4

Which fibres from C1-4 make up the cervical plexus?

Anterior fibres only

5

Which set of cervical plexus nerves lies deeper; sensory or muscular?

Muscular

6

Which nerve roots does the phrenic nerve originate from?

C3-5

7

What does the phrenic nerve innervate?

Motor innervation to diaphragm

8

Which root do the nerves to the Geniohyoid and Thyrohyoid originate from?

C1

9

What is the function of the geniohyoid muscle?

Moves hyoid bone anteriorly and superiorly to open airway

10

What is the function of the thyrohyoid muscle?

Depressed hyoid bone and elevates larynx

11

Which nerve roots does ansa cervicalis originate from?

C1-3

12

What does the ansa cervicalis nerve innervate?

All infrahyoid muscles

13

Where do the sensory nerves of the cervical plexus enter the skin?

Middle of the posterior border of the SCM
Known as Erb's point

14

Which nerve roots does the greater auricular nerve originate from?

C2-3

15

What area of skin does the greater auricular nerve supply?

External ear
Skin over parotid gland

16

Which nerve roots does the transverse cervical nerve originate from?

C2-3

17

What area of skin does the transverse cervical nerve supply?

Anterior neck
Anterio-lateral skin of neck
Upper sternum

18

Which nerve roots does the lesser occipital nerve originate from?

C2

19

What area of skin does the lesser occipital nerve supply?

Posterosuperior scalp

20

Which nerve roots does the supraclavicular nerves originate from?

C3-4

21

What area of skin do the supraclavicular nerves supply?

Skin over supraclavicular fossa, upper thoracic region and sternoclavicular joint