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PNS Quizzes > Quiz 4: Cervical Plexus > Flashcards

Quiz 4: Cervical Plexus Flashcards

1
Q

The cervical plexus is formed by the anterior primary rami of ____ through ____ spinal nerves.

A

C1, C4

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2
Q

T/F: The nerve roots of the cervical plexus form a series of communicating loops.

A

True

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3
Q

Fibers from what communicate with the loop formed by C1 and C2?

A

Inferior Vagal Ganglion

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4
Q

Fibers from the spinal accessory nerve carry ____________ information.

A

Proprioceptive

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5
Q

Fibers from the spinal accessory nerve communicate with the loop formed by what?

A

C2 & C3 with C3 & C4

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6
Q

Fibers from sternocleidomastoid travel to _____.

A

C2

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7
Q

Fibers from Trapezius travel to ______.

A

C3 & C4.

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8
Q

The hypoglossal nerve communicates with C1 fibers that will later separate from the hypoglossal nerve to become what?

A

Superior root of the ansa cervicalis

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9
Q

C1 fibers from the hypoglossal nerve supply what muscles?

A

Thyrohyoid & Geniohyoid

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10
Q

Usually three gray rami communicans carry ___________ __________ fibers to the loop between C1 & C2 and roots of C3 & C4.

A

Postganglionic sympathetic

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11
Q

What type of postganglionic sympathetic fibers, specifically, are carried in the gray rami communicans?

A

Vasomotor, Sudomotor and Pilomotor

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12
Q

What does vasomotor supply?

A

Muscular lining in blood vessels

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13
Q

What does sudomotor supply?

A

Sweat glands

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14
Q

What does pilomotor supply?

A

Hair follicles

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15
Q

What does the lesser occipital nerve supply?

A
  • Skin on superior 1/3 of auricle

- Skin behind the ear

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16
Q

The Lesser Occipital Nerve carries fibers from what level(s)?

A

C2 (and occasionally C3)

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17
Q

Why is the lesser occipital nerve clinically significant?

A

May be implicated in cases of cervicogenic headache. Adjusting C1/C2 and occiput can help.

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18
Q

The Great Auricular Nerve carries fibers from what level?

A

C2 & C3

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19
Q

Where does the Great Auricular Nerve enter?

A

The parotid gland

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20
Q

What does the Great Auricular Nerve divide into?

A

Anterior and Posterior Branches

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21
Q

The anterior branch of the Great Auricular Nerve combines with what nerve?

A

Facial Nerve VII

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22
Q

What does the anterior branch of the Great Auricular Nerve (& CN VII) supply?

A

The skin over the parotid gland

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23
Q

What does the posterior branch of the Great Auricular Nerve supply?

A

Skin over the mastoid process.

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24
Q

Where does the Transverse Cutaneous Nerve of the neck carry fibers from?

A

C2 & C3

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25
Q

What two branches does the Transverse Cutaneous Nerve of the neck divide into?

A
  • Ascending branch

- Descending branch

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26
Q

What do the ascending and descending branches of the Transverse Cutaneous Nerve of the neck supply?

A

Skin over the platysma muscle

27
Q

The trunks from C3 & C4 combine to form a trunk that gives rise to what?

A

Medial, Intermediate and Lateral Supraclavicular Nerves

28
Q

What does the Medial Supraclavicular Nerve supply?

A

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

29
Q

What does the Intermediate Supraclavicular Nerve supply?

A

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

30
Q

What does the Lateral Supraclavicular Nerve supply?

A

Skin over the superior and lateral aspects of the shoulder.

31
Q

Deep branches of the cervical plexus are divided into what?

A

Medial and Lateral Series

32
Q

The Lateral series of the deep branches passes into what?

A

Posterior Triangle

33
Q

T/F: The lateral series of the deep branches consists of sensory branches and communicating branches.

A

False, consist of communicating branches and muscular branches.

34
Q

The spinal accessory nerve may receive communicating branches carrying fibers from where?

A

C2-C4

35
Q

T/F: Muscular branches are associated with four muscles.

A

True

36
Q

What muscles are the muscular branches associated with?

A
  1. Sternocleidomastoid
  2. Trapezius
  3. Levator Scapula
  4. Middle Scalene
37
Q

SCM receives what type of fibers?

A

Proprioception

38
Q

Where does SCM receive proprioceptive fibers from?

A

C2, (maybe C3)

39
Q

Trapezius receives what type of fibers?

A

Proprioception

40
Q

Where does Trapezius receive proprioceptive fibers from?

A

C3, C4, (possibly C2)

41
Q

Levator Scapula receives what type of fibers?

A

Motor and Sensory

42
Q

What is Levator Scapula innervated by?

A

C3 & C4

43
Q

Where does Middle Scalene receive fibers from?

A

C3 & C4

44
Q

The medial series of the deep branches passes into where?

A

Anterior Triangle

45
Q

T/F: The medial series of the deep branches consists of muscular branches and communicating branches.

A

True

46
Q

Describe the first communicating branch of the medial series of the deep branches?

A

Between vagus and loop between C1 and C2

47
Q

Describe the second communicating branch of the medial series of the deep branches?

A

3 or 4 gray rami communicans from the superior cervical ganglion to the upper four cervical nerves

48
Q

Describe the third communicating branch of the medial series of the deep branches?

A

Fibers from C1 communicating with the hypoglossal nerve, then separating from the hypoglossal to form the superior root of the ansa cervicalis

49
Q

Where are muscular branches sent to in the medial series of the deep branches?

A
  1. Rectus Capitis Lateralis, C1
  2. Rectus Capitis Anterior, C1, C2
  3. Longus Capitis, C1-C3
  4. Longus Colli, C2-C4
50
Q

What root level(s) is/are associated with Rectus Capitis Lateralis?

A

C1

51
Q

What root level(s) is/are associated with Rectus Capitis Anterior?

A

C1, C2

52
Q

What root level(s) is/are associated with Longus Capitis?

A

C1-C3

53
Q

What root level(s) is/are associated with Longus Colli?

A

C2-C4

54
Q

Branches from C2 and C3 combine to form what?

A

Inferior Root of the Ansa Cervicalis

55
Q

What does the Ansa Cervicalis supply?

A
  1. Sternohyoid
  2. Sternothyroid
  3. Both bellies of Omohyoid
56
Q

The Phrenic Nerve is formed by which fiber levels?

A

C3, C4 & C5

57
Q

Which level contributes the most fibers to the phrenic nerve?

A

C4

58
Q

Where does the phrenic nerve run?

A

Descends through the neck, anterior to the anterior scalene muscle.

59
Q

What type of fibers are received by the phrenic nerve via the Cervical Ganglia?

A

Postganglionic Sympathetic Fibers

60
Q

What is the nerve supply to the diaphragm?

A

Phrenic Nerve

61
Q

What nerve is involved with the onset of hiccups?

A

Phrenic Nerve

62
Q

What is one suspected cause of hiccups related to chiropractic?

A

Subluxation

63
Q

Why is the phrenic nerve really unique evolutionarily?

A

It’s initial location is very high up from it’s innervation.

**This is important because the life of a person who has a severed spinal cord is likely to be spared because breathing isn’t inhibited (due to diaphragm function still being intact).

PNS Quizzes (7 decks)

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