unit 5: spinal nerves, cervical plexus

Question 1

the cervical plexus is formed by ANTERIOR primary rami of:

Answer 1

C1-C4 spinal nerves

Question 2

the nerve roots of the plexus form a series of communicating loops that communicate with these three CRANIAL nerves:

Answer 2

X (vagus)
XI (hypoglossal)
XII (accessory)

Question 3

fibers from the inferior vagal ganglion communicate w/ the loop formed by
-vagus n. communication

Answer 3

C1 & C2

Question 4

fibers from the spinal accessory n. carry proprioceptive info and communicate w/ the loop formed by (2 pairs):

Answer 4

C2 & C3

C3 & C4

Question 5

in regards to the spinal accessory nerve, proprioceptive info is sent from the ____ to C2, and from _____ to C3 & C4

Answer 5

SCM

trapezius

Question 6

the hypoglossal nerve communicates with __ fibers that later separate to become the:

Answer 6

C1

superior root of ansa cervicalis

Question 7

C1 fibers that supply ___ & __ remain WITH the hypoglossal nerve (do not become ansa cervicalis)

Answer 7

thyrohyoid

geniohyoid

Question 8

three gray rami communicans that carry postganglionic SYMPATHETIC fibers

Answer 8

vasomotor (VC/VD, BP)
sudomotor (increase sweat gland output)
pilomotor (erector pili, raise hair)

Question 9

the loop between these two root pairs communicate with the gray rami communicans

Answer 9

C1 & C2

C3 & C4

Question 10

LESSER OCCIPITAL nerve carries C2 fibers to supply:

Answer 10

superior 1/3 of auricle skin

skin behind ear

Question 11

lesser occipital nerve communicates with these two nerves

Answer 11

greater occipital

great auricular

Question 12

GREAT AURICULAR nerve carries fibers from __&__, and enters the ___ gland to divide into anterior and posterior branches

Answer 12

C2 & C3

parotid

Question 13

the ___ branch of the great auricular nerve combines with the __ nerve to supply the skin over the parotid gland

Answer 13

anterior

facial

Question 14

the ___ branch of the great auricular nerve supplies the skin over the mastoid process

Answer 14

posterior

Question 15

TRANSVERSE CUTANEOUS nerve of the neck carries fibers from:

Answer 15

C2 & C3

Question 16

the transverse cutaneous nerve of the neck divides into ascending & descending branches, that both supply the:

Answer 16

skin over platysma muscle

Question 17

the trunks from __&__combine to form a trunk that gives rise to the medial, intermediate, & lateral SUPRACLAVICULAR nerves

Answer 17

C3 & C4

Question 18

the MEDIAL supraclavicular nerve supplies the skin INFERIOR to the

Answer 18

sternal end of clavicle (as far inferior as rib 2)

Question 19

the INTERMEDIATE supraclavicular nerve supplies the skin over the

Answer 19

deltoid & pec major (as far inferior as rib 2)

Question 20

the LATERAL supraclavicular nerve supplies skin over the

Answer 20

superior & lateral aspects of the shoulder

Question 21

the 3 superficial branches of the cervical plexus

Answer 21

lesser occipital
greater auricular
transverse cutaneous of the neck

Question 22

the DEEP branches of the CP are divided into a __ & __ series

Answer 22

medial

lateral

Question 23

the (deep) LATERAL series of the CP passes into the posterior triangle and consists of ___ branches and __ branches

Answer 23

communicating

muscular

Question 24

within the lateral series, the __ __ nerve may receive communicating branches carrying sensory fibers from__-__

Answer 24

spinal accessory

C2-C4

Question 25

four muscles associated with the muscular branches of the lateral series

Answer 25

SCM traps levator scapula middle scalene

Question 26

SCM receives proprioception from ___-___ and trapezius from ___ -deep lateral series muscular branches

Answer 26

C2-C4 | C2 (perhaps C3)

Question 27

levator scapula (motor AND sensory) and middle scalene (motor only) are both innervated by __&__

Answer 27

C3 & C4

Question 28

the (deep) MEDIAL series passes into the ___ triangle & like the lateral series has both communicating and muscular branches in addition to the phrenic nerve

Answer 28

anterior

Question 29

- bt vagus & loop bt C1 & C2 - 3-4 gray rami communicans from sup cervical ganglion to upper 4 cervical nerves - fibers from C1 comm. w/ hypoglossal then separating to form sup root of ansa cervicalis - -these are all:

Answer 29

communicating branches of the (deep) medial series

Question 30

muscles supplied by the medial series muscular branches

Answer 30

rectus capitis lateralis rectus capitis anterior longus capitis longus colli

Question 31

``` branches that supply these muscles respectively: rectus capitis lateralis: rectus capitis anterior: longus capitis: longus colli: ```

Answer 31

C1 C1, C2 C1-C3 C2-C4

Question 32

within the medial series, branches from __ & __ combine to form the ___ root of the ansa cervicalis

Answer 32

C2 & C3 | inferior

Question 33

muscles supplied by ansa cervicalis

Answer 33

sternohyoid sternothyroid omohyoid (both bellies)

Question 34

the ____ nerve is formed by C3, *C4*, & C5, and descends thru the neck, anterior to the __ __ muscle

Answer 34

phrenic | anterior scalene

Question 35

the phrenic nerve receives POSTganglionic sympathetic fibers from the ___ ganglia, and is the nerve supply to the ___

Answer 35

cervical | diaphragm