Exam 2: Cervical Plexus

Question 1

Cervical plexus is formed by

Answer 1

Anterior primary rami of C1-4 spinal nerves

Question 2

Nerve roots of cervical plexus form a series of

Answer 2

Communicating loops

Question 3

Fibers from _____ communicate w/ loop formed by C1/C2

Answer 3

Inferior vagal ganglion

Question 4

Fibers from CN XI carry ____ info and communicate w/

Answer 4

Proprioceptive; loop formed by C2/3 and C3 and C4

Question 5

Proprioceptive info to SCM

Answer 5

C2

Question 6

Proprioceptive info from trapezius

Answer 6

C3 and C4

Question 7

Hypoglossal N communicates w/ ___ fibers that later separate to become ____

Answer 7

C1; superior root of ansa cervicalis

Question 8

C1 fibers that supply ___ and ____ remain w/ hypoglossal N

Answer 8

Thyrohyoid and geniohyoid

Question 9

Usually 3 gray rami communicans from SCG carrying ____ fibers go to

Answer 9

Post sympathetic

loop between C1/2 and roots of C3 and C4

Question 10

Superficial branches are all

Answer 10

Named nerves (cutaneous supply)

Question 11

Lesser occipital N fibers from

Answer 11

C2 (occasionally C3)

Question 12

Less occipital N supply

Answer 12

Skin superior 1/3 of auricle

Skin behind ear

Question 13

Lesser occipital N has communications w/

Answer 13

Greater occipital

Great auricular

Question 14

What nerve may be implicated in cases of cervicogenic headache

Answer 14

Lesser occipital N

Question 15

Great auricular N carries fibers from

Answer 15

C2 and C3

Question 16

Anterior branch of Great auricular N combines w/ ___ to supply

Answer 16

Facial N; skin over parotid gland

Question 17

Posterior branch of Great auricular N supplies

Answer 17

Skin over mastoid process

Question 18

Transverse cutaneous N of neck carries fibers from

Answer 18

C2 and C3

Question 19

Transverse cutaneous N of neck supplies

Answer 19

Skin over platysma muscle

Question 20

Trunks from C3 and C4 combine to form a trunk that gives rise to

Answer 20

Medial, intermediate and lateral supraclavicular N

Question 21

Medial supraclavicular N supplies

Answer 21

Skin inferior to sternal end of clavicle down to 2nd rib

Question 22

Intermediate supraclavicular N supplies

Answer 22

Skin over deltoid and pec major

Question 23

Lateral supraclavicular N supplies

Answer 23

Skin over superior and lat aspects of shoulder

Question 24

Deep branches of cervical plexus are divided into

Answer 24

Medial and lateral series

Question 25

Lateral series passes into

Answer 25

Posterior triangle

Question 26

Muscular branches of lateral series supply these muscles

Answer 26

SCM
Trapezius
Levator scap
Middle scalene

Question 27

Levator scap innervated by

Answer 27

C3 and C4

Motor and sensory

Question 28

Middle scalene receives fibers from

Answer 28

C3 and C4

Question 29

Medial series passes into

Answer 29

Anterior triangle

Question 30

Communicating branches of medial series

Answer 30

Vagus/loop of C1 and 2
Gray rami communicans
C1 fibers w/ hypoglossal N

Question 31

Gray rami communicans are from

Answer 31

Superior cervical ganglion

Question 32

Muscular branches of medial series supply

Answer 32

Rectus capitis lateralis
Rectus capitis anterior
Longus capitis
Longus colli

Question 33

Longus capitis supplies by

Answer 33

C1-3

Question 34

Longus colli supplied by which levels

Answer 34

C2-4

Question 35

Branches from ____ combine to form inferior root of ansa cervicalis

Answer 35

C2 and 3

Question 36

Ansa cervicalis supplies

Answer 36

Sternohyoid
Sternothyroid
Both bellies of omohyoid

Question 37

Phrenic nerve formed by fibers from

Answer 37

C3,4,5

Question 38

which level contributes most fibers to phrenic nerve

Answer 38

C4

Question 39

Phrenic receives ______ fibers from cervical ganglia

Answer 39

Post sympathetic

Question 40

Phrenic N supplies

Answer 40

Diaphragm

Question 41

Subluxation involving levels of phrenic nerve may cause

Answer 41

Hiccups

Question 42

Rectus capitis lateralis supplied by which levels

Answer 42

C1

Question 43

Rectus capitis anterior supplied by which levels

Answer 43

C1, 2