Spinal Nerves Part 3

Question 1

Which superficial branch of the cervical plexus carries fibers from C2 and C3 and divides into anterior/posterior branches after entering the parotid gland?

Answer 1

great auricular nerve

Question 2

What CN does the anterior branch of the great auricular nerve combine with to supply the skin over the parotid gland?

Answer 2

Facial nerve

Question 3

What does the posterior branch of the great auricular nerve supply?

Answer 3

skin over the mastoid process

Question 4

What superficial branch of the cervical plexus carries fibers from C2 and C3 and divides into ascending/descending branches which both supply the platysma muscle?

Answer 4

Transverse cutaneous nerve

Question 5

What nerves arise from the trunk formed by the trunks from C3 and C4?

Answer 5

medial, intermediate, and lateral supraclavicular nerves

Question 6

What is supplied by the medial supraclavicular nerve?

Answer 6

the skin inferior to the sternal end of the clavicle, as far inferior as the second rib

Question 7

What is supplied by the intermediate supraclavicular nerve?

Answer 7

the skin over the deltoid and pectoralis major, as far inferior as the second rib

Question 8

What is supplied by the lateral supraclavicular nerve?

Answer 8

the skin over the superior and lateral aspects of the shoulder

Question 9

What are the deep branches of the cervical plexus divided into?

Answer 9

a medial series and a lateral series

Question 10

Which series of the deep branches of the cervical plexus passes into the posterior triangle?

Answer 10

lateral series

Question 11

Which series of the deep branches of the cervical plexus consists of a number of communicating and muscular branches?

Answer 11

Bothe the medial and lateral series

Question 12

Which CN may receive some communicating branches carrying fibers from C2-C4?

Answer 12

spinal accessory nerve

Question 13

What 4 muscles are associated with the muscular branches of the lateral series of the deep branches of the cerivcal plexus?

Answer 13

SCM, Trapezius, Levator scapula and Middle scalene

Question 14

Which muscle supplied by the lateral series of the deep branches of the cervical plexus receives proprioceptive and sensory fibers from C2-C4?

Answer 14

SCM

Question 15

What kind of fibers does the the trapezius receive from C2 (and perhaps C3)?

Answer 15

proprioception fibers

Question 16

What kind of innervation does the levator scapula receive fromm C3 and C4?

Answer 16

motor and sensory

Question 17

Where do the middle scalenes receive fibers from?

Answer 17

C3 and C4

Question 18

Which series of the deep branches of the cervical plexus passes into the anterior triangle?

Answer 18

media series

Question 19

T/F: the medial series has communicating branches between the vagus and the loop between C1 and C2.

Answer 19

True

Question 20

What are the communicating branches of the medial series between the superior cervical ganglion to the upper four cervical nerves?

Answer 20

3 or 4 gray rami communicans

Question 21

T/F: fibers from C2 communicate with the hypoglossal nerve then separate to form the superior root of the ansa cervicalis.

Answer 21

False; this is true of the fibers from C1

Question 22

Where are muscular branches of the medial series sent?

Answer 22

rectus capitis lateralis (C1), rectus capitis anterior (C1, C2), longus capitis (C1-C3), and longus colli (C2-C4)

Question 23

What do branches of C2 and C3 combine to form?

Answer 23

the inferior root of the ansa cervicalis

Question 24

What does the ansa cervicalis supply?

Answer 24

sternohyoid, sternothyroid, and both bellies of the omohyoid

Question 25

What levels form the phrenic nerve and which level contributes the most fibers?

Answer 25

C3, C4, and C5 with C4 contributing the most fibers

Question 26

T/F: the phrenic nerve descends trhough the neck, posterior to the anterior scalene muscle.

Answer 26

False; should say anterior to the anterior scalen muscle

Question 27

Where does the phrenic nerve receive postganglionic sympathetic fibers from?

Answer 27

all 3 cervical ganglia

Question 28

What does the phrenic nerve supply?

Answer 28

the diaphragm

Question 29

What typically results when a subluxation impinges or irritates the phrenic nerve?

Answer 29

hiccups