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PNS Exam Two > Unit V - Cervical Plexus > Flashcards

Unit V - Cervical Plexus Flashcards

1
Q

What makes up the cervical plexus?

A

Anterior primary rami of C1-C4 spinal nerves

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2
Q

The cervical plexus communicates via loops with which cranial nerves?

A

Vagus, accessory and hypoglossal nerves (X, XI, and XII)

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3
Q

Which part of the sympathetic chain communications carries myelinated axons from cell bodies found in the lateral horn cells at cord levels T1-L2?

A

White ramus communicans

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4
Q

Which part of the sympathetic chain communications carries unmyelinated postganglionic sympathetic axons from cell bodies in the sympathetic chain to the spinal nerve?

A

Gray ramus communicans

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5
Q

Which is associated with nerves T1-L2: white or gray ramus communicans?

A

White ramus communicans

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6
Q

At what levels do we find gray ramus communicans?

A

One is associated with each spinal nerve

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7
Q

What is the communication between the cervical plexus and vagus nerve?

A

Fibers from the inferior vagal ganglion communicate with the loop formed by C1 and C2

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8
Q

What is the communication between the spinal accessory nerve and the cervical plexus?

A

Fibers from the spinal accessory nerve carry proprioceptive information and communicate with the loop formed by C2 and C3 and with roots C3 and C4

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9
Q

Proprioceptive information from the sternocleidomastoid specifically communicates with what part of the cervical plexus?

A

C2

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10
Q

Proprioceptive information from the trapezius specifically communicates with what part of the cervical plexus?

A

C3 and C4

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11
Q

What is the communication between the cervical plexus and the hypoglossal nerve?

A

Hypoglossal nerve communicates with C1 fibers that separate to become the superior root of the ansa cervicalis (some C1 fibers remain with the hypoglossal nerve to supply 2 muscles)

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12
Q

C1 fibers that remain with the hypoglossal nerve instead of becoming the superior root of the ansa cervicalis supply what muscles?

A

Thyrohyoid and geniohyoid

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13
Q

How many gray rami communicans are involved in the communication between the cervical plexus and superior cervical ganglion?

A

3

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14
Q

The three gray rami communicans carry what kind of information to the cervical plexus?

A

Postganglionic sympathetic fibers (vasomotor, sudomotor, and pilomotor)

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15
Q

The superior cervical ganglion communicates with what specific parts of the cervical plexus?

A

Loop between C1 and C2 and the roots of C3 and C4

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16
Q

What are the superficial branches of the cervical plexus?

A

Lesser occipital nerve, great auricular nerve, transverse cutaneous nerve of the neck, supraclavicular nerves

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17
Q

The lesser occipital nerve carries fibers from what part of the cervical plexus?

A

C2 (and occasionally C3)

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18
Q

What is the supply of the lesser occipital nerve?

A

Skin on the superior 1/3 of the auricle as well as the skin behind the ear

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19
Q

The lesser occipital nerve has communications with what other nerves?

A

Greater occipital nerve and great auricular nerve

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20
Q

The great auricular nerve carries fibers from what part of the cervical plexus?

A

C2 and C3

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21
Q

Which superifical branch of the cervical plexus may be implicated in cases of cervicogenic headache?

A

Lesser occipital nerve

22
Q

Which superficial branch of the cervical plexus enters the parotid gland and divides into anterior and posterior branches?

A

Great auricular nerve

23
Q

What branch of the great auricular nerve combines with the facial nerve to supply the skin over the parotid gland?

A

Anterior branch

24
Q

What branch of the great auricular nerve supplies the skin over the mastoid process?

A

Posterior branch

25
Q

The transverse cutaneous nerve of the neck carries fibers from what part of the cervical plexus?

A

C2 and C3

26
Q

What is the supply of the transverse cutaneous nerve of the neck?

A

Both branches (ascending and descending) supply the skin over the platysma muscle

27
Q

Trunks from what roots of the cervical plexus give rise to the medial, intermediate, and lateral supraclavicular nerves?

A

C3 and C4

28
Q

What does the medial supraclavicular nerve supply?

A

The 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

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

30
Q

What does the lateral supraclavicular nerve supply?

A

The skin over the superior and lateral aspects of the shoulder

31
Q

The lateral series of the deep branches of the cervical plexus pass through what body triangle?

A

Posterior triangle

32
Q

The spinal accessory nerve may receive communicating branches carrying fibers from what part of the cervical plexus?

A

C2-C4

33
Q

What four muscles are supplied by the lateral series of the deep branches of the cervical plexus?

A

SCM, trapezius, levator scapulae, middle scalene

34
Q

The SCM receives proprioceptive fibers from what part of the cervical plexus?

A

C2, C3, and C4

35
Q

The trapezius receives proprioceptive fibers from what part of the cervical plexus?

A

C2, perhaps C3

36
Q

The levator scapulae is innervated by what parts of the cervical plexus?

A

C3 and C4 (both motor and sensory)

37
Q

The middle scalene muscle receives fibers from what part of the cervical plexus?

A

C3 and C4

38
Q

The medial series of the deep branches of the cervical plexus pass through what body triangle?

A

Anterior triangle

39
Q

What muscles are supplied by the medial series of the deep branches of the cervical plexus?

A

Rectus capitis lateralis, rectus capitis anterior, longus capitis, longus colli

40
Q

What cervical plexus root is associated with rectus capitis lateralis?

A

C1

41
Q

What cervical plexus roots supply the rectus capitis anterior muscle?

A

C1, C2

42
Q

What cervical plexus roots supply the longus capitis muscle?

A

C1-C3

43
Q

What cervical plexus roots supply the longus colli muscle?

A

C2-C4

44
Q

What branches of the cervical plexus combine to form the inferior root of the ansa cervicalis?

A

C2 and C3

45
Q

What muscles are supplied by the ansa cervicalis?

A

Sternohyoid, sternothyroid, both bellies of the omohyoid

46
Q

What cervical plexus fibers form the phrenic nerve?

A

C3, C4, C5

47
Q

Which root of the cervical plexus contributes the most fibers to the phrenic nerve?

A

C4

48
Q

The phrenic nerve receives postganglionic sympathetic fibers from what location?

A

Cervical ganglia

49
Q

What is the nerve supply to the diaphragm?

A

Phrenic nerve

50
Q

The phrenic nerve descends through the neck, anterior to what muscle?

A

Anterior scalene

51
Q

Subluxation of the middle spine resulting in hiccups is most likely to have what nerve interference?

A

Phrenic nerve

52
Q

What organ could be affected or paralyzed due to spinal cord injuries near the region of the phrenic nerve (C3-C5)?

A

Diaphragm

PNS Exam Two (5 decks)

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