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DPT 803: Neurobio 2 > Lecture 6- spinal nerves > Flashcards

Lecture 6- spinal nerves Flashcards

1
Q

how many pairs of spinal nerves are there

A

31

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2
Q

how many spinal nerves in the cervical region are only motor

A

1
C1

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3
Q

how many spinal nerves are in each region

A

cervical 8
thoracic 12
lumbar 5
sacral 5
coccygeal 1

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4
Q

what is the endoneurium

A

continuous of pia mater wrappring around a single axon

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5
Q

what is perineurium

A

continuous of arachnoid mater wrapping around bundles of axons

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6
Q

what is epineurum

A

continuous of dura mater wrapping around bundles of fasicles

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7
Q

how do peripheral nerves receive blood supply

A

plexus of arterioles follow the nerves

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8
Q

what is a neuropraxia injury

A

compression injury with intact axons

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9
Q

what is an axonotmesis injury

A

tear of axons

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10
Q

what is a neurotmesis injury

A

tear of whole fascicle/nerve

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11
Q

what is the difference between axonotmesis vs neurotmesis prognosis

A

axon- intact endo, good chance of recovery

neuro- disrupted endo, peri, and/or epi, poor chance of recovery

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12
Q

within the thoracic sp n, what does the dorsal ramus breakdown into

A

medial and lateral branch

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13
Q

within the thoracic sp n, what does the ventral ramus breakdown into

A

lateral and anterior cutaneous
muscular branch

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14
Q

what does the medial branch of the dorsal ramus innervate in the thoracic region

A

vertebral disc, facet jts, back m and skin

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15
Q

what does the lateral branch of the dorsal ramus innervate in the thoracic region

A

mainly m
slightly skin

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16
Q

what does the lateral cutaneous branch of the ventral ramus innervate in the thoracic region

A

anterior and posterior branch

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17
Q

what does the anterior cutaneous branch of the ventral ramus innervate in the thoracic region

A

lateral and medial branch

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18
Q

what does the muscular branch of the ventral ramus innervate in the thoracic region

A

intercostals, serratus posterior, and abdominal wall muscles

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19
Q

dermatome for the ASIA scale is testing what

A

segmental distribution along a spinal n
crude touch and sharp pain by Ad

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20
Q

if we are assessing the trunk dermatome, what spinal nerves are we testing

A

ventral and dorsal rami

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21
Q

if we are assessing the neck or extremities dermatome, what spinal nerves are we testing

A

peripheral n from plexus formed by ventral rami

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22
Q

what nerves make up the cervical plexus for cutaneous innervation

A

lesser occipital- C2
greater auricular C2-3
transverse cervical C2-3
supraclavicular C3-4

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23
Q

what rami makes up the cervical plexus

A

ventral rami

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24
Q

where is the greater auricular n

A

mandibular angle

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25
Q

where does the supraclavicular n exit

A

prox 1/3 of post SCM

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26
Q

where does the greater occipital n come from

A

C2 and dorsal rami

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27
Q

what makes up the muscular innervation of the cervical plexus

A

C1 to gleniohyoid and thyrohyoid m from CN XII
ansa cervicalis- superior (C1), inferior (C2-3)
phrenic C3-5

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28
Q

what muscles are innervated by ansa cervicalis

A

infrahyoid neck m

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29
Q

what rami makes up the brachial plexus

A

ventral rami

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30
Q

what is the innervation for the superior trunk

A

C5-6

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31
Q

what is the innervation for the middle trunk

A

C7

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32
Q

what is the innervation for the inferior trunk

A

C8-T1

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33
Q

what seperates C8 and T1 in the inferior trunk of the brachial plexus

A

1st rib

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34
Q

True/false
only 2 out of the 3 trunks give out an anterior/posterior division

A

false
all 3 give out an anterior/posterior division

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35
Q

what divisions makes up the lateral cord of the brachial plexus

A

anterior division of superior/middle trunk

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36
Q

what divisions makes up the medial cord of the brachial plexus

A

anterior division of inferior trunk

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37
Q

what divisions makes up the posterior cord of the brachial plexus

A

all posterior divisions

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38
Q

what nerves are given out from the superior trunk

A

dorsal scap C4/5
long thoracic C5-7
suprascapular C5-6
n to subclavius C5-6

39
Q

what m are innervated by dorsal scapular n

A

levator scapulae and rhomboids

40
Q

what m are innervated by long thoracic n

A

serratus anterior

41
Q

what m are innervated by suprascapular n

A

supra and infraspinatus

42
Q

what m are innervated by n to subclavius

A

subclavius

43
Q

what nerves come off the lateral cord

A

lateral pectoral C5-T1
musculocutaneous C5-7
branch to median C5-7

44
Q

what are the nerve roots for the lateral cord

A

C5-7

45
Q

what nerve is the bridge between lateral and medial cord

A

lat pectoral n

46
Q

what m are innervated by lat pectoral n

A

pec major

47
Q

what m are innervated by musculocutaneous

A

coracobrachialis C5-6
brachialis C5-6
lat antebrachial cutaneous n

48
Q

what m receives innervation from both musculocutaneous (c5-6) and radial n (C7)

A

brachialis

49
Q

what n gives the lat forearm cutaneous innervation and what cord does it stem from

A

lat antebrachial cutaneous n
lat cord

50
Q

what are the n roots for the medial cord

A

C8-T1

51
Q

what nerves stem from the medial cord

A

medial pectoral n C5-T1
med brachial cutaneous
med antebrachial cutaneous
ulanr n
branch to median

52
Q

what m are innervated by medial pectoral n

A

pec major and pec minor

53
Q

what is the cutaneous innervation for the ulnar n

A

dorsal and palmar side last 1.5 digits

54
Q

what forearm m are innervated by the ulanr n

A

flexor carpi ulnaris
1/2 flexor digitorum profundus

55
Q

what hand m are innervated by the ulnar n

A

palmaris brevis
ulanr 2 lumbricals
flexor pollicis brevis
interossei
adductor pollicis
ABD digiti minimi
flexor digiti minimi
opponens digiti minimi

56
Q

what forearm m are innervated by median n

A

pronator teres
flexor carpi radialis
palmaris longus
flexor digitorum superficialis
flexor pollicis longus
1/2 flexor digitorum profundus
pronator quadratus

57
Q

what hand m are innervated by median n

A

ABD pollicis brevis
flexor pollicis brevis
opponens pollicis
radial 2 lumbricals

58
Q

what is the cutaneous innervation for the median n

A

radial palmar side of first 3.5 digits
dorsal DIP

59
Q

what nerve roots are the posterior cord made of

A

C5-T1

60
Q

what nerves stem from the posterior cord

A

upper subscapular C5-6
middle supscapular/thoracodorsal C6-8
lower subscapular C5-6
axillary C5-6
radial n C5-T1

61
Q

what m are innervated by upper subscapular n

A

subscapularis

62
Q

what m are innervated by middle subscapular/thoracodorsal

A

lat dorsi

63
Q

what m are innervated by lower subscapular

A

subscapularis and teres major

64
Q

what m are innervated by axillary n

A

deltoid
teres minor

65
Q

what cutaneous innervation does the axillary n give off

A

shoulder girdle along deltoid

66
Q

what arm/elbow m are innervated by radial n

A

triceps
brachioradialis
anconeus
supinator

67
Q

what forearm m are innervated by radial n

A

ABD pollicis longus
EXT pollicis brevis
ECRL/B
EXT pollicis longus
EXT digitorum
EXT indicis
EXT digiti minimi
EXT carpi ulnaris

68
Q

what rami makes up the lumbar plexus and directly supplies which n

A

ventral T12-L4
iliohypogastric T12-L1
ilioinguinal L1
gentifemoral L1-2

69
Q

what nerve roots make up the anterior and posterior divisions of the lumbar plexus

A

L2-4

70
Q

what are the nerves that make up the anterior division of the lumabr plexus and its distribbution

A

obturator L2-4
lumbosacral trunk L4-5

medial thigh

71
Q

what are the nerves that make up the posterior division of the lumbar plexus and its distribution

A

lat femoral cutaneous L2-3
femoral L2-4

lateral and anterior thigh

72
Q

what m are innervated by obturator n

A

pectineus
obturator externus
adductors
gracilis

73
Q

what are the functions of the m innervated by the obturator n

A

hip ADD/IR or ER= pectineus and obturator externus

knee FLX/IR= gracilis

74
Q

what m are innervated by femoral n

A

iliopsoas
sartorius
pectineus
quadriceps

75
Q

what are the functions of the m innervated by the femoral n

A

hip FLX/ER
knee EXT/IR

76
Q

what n is given out to provide cutaneous innervation for the medial leg to foot arch

A

femoral n that gives off saphenous n

77
Q

what n roots make up the sacral plexus

A

L4-S3

78
Q

what nerves make up the anterior/ventral division of the sacral plexus

A

tibial L4-S3
pudendal S2-4
pelvis splanchnic S2-4

79
Q

what nerves make up the posterior/dorsal division of the sacral plexus

A

common fibular L4-S2
sup gluteal L4-S1
inf gluteal L5-S2

80
Q

what cutaneous innervation does the sacral plexus give out

A

post femoral cutaneous S1-3

81
Q

what makes up the sciatic n

A

common fibular L4-S2
tibial L4-S3

82
Q

what m are innervated by sup gluteal n

A

gluteus medius
gluteus minimus
tensor fasciae latae

83
Q

what m are innervated by inf gluteal n

A

gluteus maximus

84
Q

what thigh m are innervated by common fibular n

A

bicep femoris short head

85
Q

what leg m are innervated by superficial common fibular n

A

fibularis longus/brevis

86
Q

what leg m are innervated by deep common fibular n

A

tib anterior
EXT digitorum longus
EXT hallicus longus
fibularis tertius

87
Q

what are the functions of the m innervated by common fibular n

A

knee FLX/ER
ankle/foot DF/INV/PF/EVE/toe ext

88
Q

what is the cutaneous innervation given off by the common fibular n

A

superficial- lat leg/dorsum foot

deep- dorsum foot between 1 and 2 toes

89
Q

what m are innervated by tibial n

A

HS (except bicep femoris short head)
gastroc
soleus
post tib
all foot intrinsics

90
Q

what are the functions of the m innervated by tibial n

A

hip EXT
knee FLX/IR/ER
ankle/foot PF/INV/ADD/toe flx

91
Q

what is the cutaneous innervation of the tibial n

A

post leg to lat foot by sural n
sole

92
Q

what branches make up the sural n

A

both common fibular and tibial n branches

93
Q

what is the difference between radiculopathy vs peripheral neuropathy

A

rad- segmental distribution with mutiple sp n, less common

peri- localized region of a single sp n, very common

94
Q

where does C1 spinal n run

A

between occiput and atlas

DPT 803: Neurobio 2 (9 decks)

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