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PNS #2 > Cervical Plexus > Flashcards

Cervical Plexus Flashcards

1
Q

What is the cervical plexus formed by?

A

anterior primary rami of C1-C4

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2
Q

What form a series of communicating loops in the cervical plexus?

A

nerve roots

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3
Q

What fibers communicate with the loop formed by C1-C2?

A

inferior (nodose) vagal ganglion fibers

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4
Q

What do fibers from the spinal root of the accessory nerve carry?

A

proprioceptive information

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5
Q

Where do the fibers of the spinal root of the accessory nerve communicate?

A

loops formed by: C2-C3 and C3-C4

  - SCM to C2
  - trapezius to C3-C4
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6
Q

What named nerve communicates with C1 fibers?

A

Hypoglossal nerve

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7
Q

C1 fibers separate from the hypoglossal nerve and become what?

A

superior root of the ansa cervicalis

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8
Q

What usually carries postganglionic sympathetic fibers and loop between C1-C2 and C3-C4?

A

3 gray rami communicans (vasomotor, sudomotor, pilomotor)

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9
Q

What are the superficial branches of the cervical plexus?

A

lesser occipital nerve, great auricular nerve, transverse cutaneous nerve of the neck, medial/intermediate/lateral supraclavicular nerves

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10
Q

What fibers does the lesser occipital nerve carry?

A

C2 sometimes C3

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11
Q

What does the lesser occipital nerve supply?

A

skin on superior 1/3 of the auricle and skin behind the ear

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12
Q

What nerves does the lesser occipital nerve communicate with?

A

greater occipital nerve and great auricular nerve

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13
Q

What nerve might be implicated in cervicogenic headache?

A

lesser occipital nerve

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14
Q

What fibers does the great auricular nerve carry?

A

C2 and C3

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15
Q

What does the great auricular nerve enter and then divide into?

A

parotid gland, divides into anterior and posterior branches

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16
Q

What does the anterior branch of the great auricular nerve combine with?

A

facial nerve

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17
Q

What does the anterior branch of the great auricular nerve and the facial nerve together innervate?

A

skin over the parotid gland

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18
Q

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

A

skin over the mastoid process

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19
Q

What does the transverse cutaneous nerve of the neck carry fiber wise?

A

Fibers from C2 and C3

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20
Q

What does the lateral cutaneous nerve of the neck divide into?

A

ascending and descending branches

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21
Q

What do the ascending and descending branches of the lateral cutaneous nerve supply?

A

skin over the platysma muscle

22
Q

What trunks combine to form a trunk giving off the medial, intermediate, lateral supraclavicular nerves?

A

C3 and C4 trunks

23
Q

What does the medial supraclavicular nerve supply?

A

skin inferior to the sternal end of the clavicle as far inferior as the 2nd rib

24
Q

What does the intermediate supraclavicular nerve supply?

A

skin over the deltoid and pectoralis major as far inferior as the 2nd rib

25
Q

What does the lateral supraclavicular nerve innervate?

A

skin over the superior and lateral aspects of the shoulder

26
Q

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

A

a medial and lateral series

27
Q

Where is the lateral series of deep cervical plexus found?

A

passes into the posterior triangle

28
Q

What does the lateral series of deep cervical plexus divide into?

A

spinal root of the accessory nerve and muscular branches

29
Q

What does the spinal root of the accessory nerve recieve communicating branches from?

A

fibers from C2-C4

30
Q

What are the 4 muscular branches of the lateral series of deep cervical plexus fibers?

A

SCM, trapezius, levator scapula, middle scalene

31
Q

Where does the SCM receive proprioceptive information from?

A

C2, C3 and C4

32
Q

Where does the trapezius receive proprioceptive information from?

A

C2 maybe C3

33
Q

Where does levator scapula recieve motor and sensory fibers from?

A

C3 and C4

34
Q

Where does the middle scalene receive fibers from?

A

C3 and C4

35
Q

Where does the medial series from the deep cervical plexus pass?

A

passes into the anterior triangle

36
Q

What does the medial series of deep cervical plexus fibers divide into?

A

communicating and muscular branches

37
Q

What are the communicating branches of the medial deep cervical plexus fibers?

A
  • between vagus and loop between C1 and C2
  • 3-4 gray rami communicans to form the superior cervical ganglion to the upper 4 cervical nerves (C1-4)
  • fibers from C1 communicating w/ hypoglossal nerve, separates from the hypoglossal nerve to form the superior root of the ansa cervicalis
38
Q

What are the muscular branches of the medial series of deep cervical plexus fibers sent to?

A

rectus capitis lateralis
rectus capitis anterior
longus capitis
longus colli

39
Q

What fibers of the muscular branches of the deep cervical plexus fibers supply rectus capitis lateralis?

A

C1

40
Q

What fibers of the muscular branches of the deep cervical plexus fibers supply rectus capitis anterior?

A

C1 and C2

41
Q

What fibers of the muscular branches of the deep cervical plexus fibers supply longus capitis?

A

C1-C3

42
Q

What fibers of the muscular branches of the deep cervical plexus fiberes supply longus colli?

A

C2-C4

43
Q

What branches from the medial series of deep cervical plexus fibers combine to form the inferior root of the ansa cervicalis?

A

C2 and C3

44
Q

What does the ansa cervicalis supply?

A

sternohyoid, sternothyroid, and both bellies of omohyoid

45
Q

What is the phrenic nerve formed by?

A

C3-C5

46
Q

What cervical nerve contributes the most fibers to the ansa cervicalis?

A

C4

47
Q

How does the phrenic nerve travel?

A

descends through the neck, anterior to the anterior scalene muscle

48
Q

How does the phrenic nerve receive postganglionic fibers?

A

from the cervical ganglia

49
Q

What does the phrenic nerve innervate?

A

diaphragm

50
Q

What could be a cause of hiccups that just won’t go away?

A

subluxation affecting the phrenic nerve

51
Q

When is someone considered a quadrapaligic?

A

spinal cord injury at C8 or above (you can still breathe do to multiple cord levels supplying the diaphragm)

PNS #2 (7 decks)

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