quiz 5: sacral plexus Flashcards Preview

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Flashcards in quiz 5: sacral plexus Deck (119):
1

how many pairs of sacral spinal nerves are there

5

2

the nerves descend inside the dura to form much of the

cauda equina

3

each sacral nerve divides into

an anterior and posterior primary ramus

4

what makes up the posterior primary rami

s1-s4

5

what do the posterior primary rami travel through

the 4 posterior sacral foramina

6

what does s5 travel through

sacral hiatus

7

the sacral posterior rami decrease in size from

superior to inferior

8

the posterior primary rami of s1-s3 divide into

medial and lateral branches

9

what do the medial branches supply

the adjacent multifidi

10

what do the lateral branches combine with

L5 and s4

11

what do the lateral branches supply

skin over the buttocks

12

the posterior primary rami of ___ unite with the coccygeal posterior rami

S4 and S5

13

what does the posterior primary rami of S4 and S5 and the coccygeal posterior rami supply

the skin over the coccyx

14

what do the anterior primary rami of S1-S4 travel through

the 4 anterior sacral foramina

15

what does the anterior primary rami contribute to

the sacral (S1-S4) and coccygeal (S4,S5) plexuses

16

3 or 4 sacral sympathetic ganglia communicate with the

sympathetic trunk

17

what will each sacral nerve of the anterior primary rami receive

postganglionic sympathetic fibers

18

what does each nerve receive postganglionic sympathetic fibers from

gray ramus communicans

19

what forms the sacral plexus

L4, L5, S1-S3, and part of S4

20

the contributions from L4 and L5 are by way of the

lumbosacral trunk

21

where does the plexus form

on the anterior surface of the piriformis muscle

22

when do the nerve roots divide into an anterior and posterior division

shortly after exiting their IVF/sacral foramen

23

what fibers make up the nerve to the quadratus femoris and gemellus inferior

L4, L5 and S1

24

where does the nerve to the quadratus femoris and gemellus inferior leave the pelvis

through the greater sciatic foramen

25

what is the function of the nerve to the quadratus femoris and gemellus inferior

muscles that contribute to lateral rotation and adduction of the thigh

26

what fibers make up the nerve to the obturator internus and gemellus superior

L5, S1, and S2

27

where does the nerve to the obturator internus and gemellus superior leave the pelvis

through the greater sciatic foramen-> then gives off branches to the gemellus superior

28

where does the nerve to the obturator internus and gemellus superior reenter the pelvis

via the lesser sciatic foramen

29

what does the lesser sciatic foramen supply

the obturator internus

30

what is the function of the nerve to the obturator internus and gemellus superior supply

muscles that contribute to lateral rotation and abduction of the thigh

31

what fibers make up the pudendal nerve

S2, S3 and S4

32

where does the pudendal nerve leave the pelvic cavity

through the greater sciatic foramen

33

what does the pudendal nerve arch around

ischial spine

34

what does the pudendal nerve enter the perineum via

lesser sciatic foramen

35

what does the pudendal nerve travel in

the pudendal canal

36

what does the pudendal nerve travel inferior to

the pubic symphysis

37

what does the pudendal nerve supply

the dorsal side of the penis or clitoris

38

what comes off the pudendal nerve within the pudendal canal

several branches

39

what do the inferior rectal nerves supply

skin around the anus and the inferior 2/3 of the anal canal

40

what nerve is associated with the anal pucker response

inferior rectal nerves

41

what muscle does the inferior rectal nerve supply

external anal sphincter

42

the ___ nerve is given off the pudendal nerve and divides into deep and superficial branches

perineal nerve

43

what muscles does the deep branch of the perineal nerve supply

external anal sphincter, bulbosponsiosus, ischiocavernosus, superficial transverse perineus

44

what does the superficial branches of the perineal nerve supply

posterior scrotum, urethral mucosa, bulb of the penis, labium magus, external urethral orifice and vestibule

45

the terminal branch of the pudendal nerve (dorsal nerve of the penis or clitoris) supplies what muscles

deep transverse perineus and urethral sphincter muscles

46

what does the dorsal nerve supply

sensory to the corpus cavernous, glans penis, skin covering the penis, corpus cavernosum and clitoris

47

what fibers form the muscular branches off the sacral plexus

S4

48

what do the muscular branches of the sacral plexus supply

levator ani and coccygeus muscles

49

what fibers make up the pelvic splanchnic nerves

S2, S3, and S4

50

what fibers make up the nerve to the piriformis

S1 and S2

51

what fibers make up the superior gluteal nerve

L4, L5 and S1

52

where does the superior gluteal nerve leave the pelvis

through the greater sciatic foramen

53

the superior gluteal nerve travels superior to the

piriformis

54

what does the superior gluteal nerve split into

superior and inferior branches

55

what does the superior branch of the superior gluteal nerve supply

gluteus medius and gluteus minimus

56

what does the inferior branch of the superior gluteal nerve supply

gluteus medius, gluteus minimus, and tensor fascia lata

57

what fibers make up the inferior gluteal nerve

L5, S1 and S2

58

where does the inferior gluteal nerve leave the pelvis

through the greater sciatic foramen

59

what does the inferior gluteal nerve travel inferior to

piriformis

60

what does the inferior gluteal nerve supply

gluteus maximus

61

what fibers form the perforating cutaneous nerve

S2 and S3

62

what does the perforating cutaneous nerve travel through

sacrotuberous ligament

63

what does the perforating cutaneous nerve reach

the lower medial aspects of the buttocks

64

where can the perforating cutaneous nerve also come off of

as a branch of the pudendal nerve

65

what 2 nerves are formed by both the anterior and posterior divisions of the sacral plexus

posterior cutaneous nerve of the thigh and the sciatic nerve

66

what fibers form the posterior cutaneous nerve of the thigh

anterior S2 and S3 and posterior S1 and S2

67

where does the posterior cutaneous nerve of the thigh leave the pelvis

through the greater sciatic foramen

68

where does the posterior cutaneous nerve of the thigh descend

through the posterior thigh and inferior to the leg

69

what does the posterior cutaneous nerve of the thigh communicate with

sural nerve

70

what does the posterior cutaneous nerve of the thigh supply

skin on the posterior and medial thigh

71

what is the largest nerve in the human body

sciatic nerve

72

what forms the sciatic nerve

tibial and common fibular nerve

73

what fibers make up the tibial nerve

anterior L4-S3

74

what fibers make up the common fibular nerve

posterior L4-S2

75

what fibers make up the sciatic nerve

anterior L4-S3 and posterior L4-S2

76

where does the sciatic nerve leave the pelvis

through the greater sciatic foramen through a common sheath

77

where does the sciatic nerve travel below to

piriformis muscle

78

where does the sciatic nerve travel inferior to

posterior aspect of the adductor magnus

79

where does the sciatic nerve split

2/3 of the way to the knee-> variable

80

what fibers make up the common fibular nerve

L4-S2

81

what does the common fibular nerve travel around

the lateral aspect of the fibula

82

what does the common fibular nerve give off

articular branch to the knee joint

83

what branches are given off as the common fibular nerve travels along the lateral aspect of the popliteal fossa

sensory branches: lateral sural cutaneous nerve and fibular communicating branch

84

what does the lateral rural cutaneous nerve supply

skin on the lateral aspect of the leg

85

what does the fibular communicating branch form with the medial rural cutaneous nerve

sural nerve

86

what does the common fibular nerve divide into

superficial and deep fibular nerves

87

what does the superficial fibular nerve travel inferior to

between the fibulas longus and the fibular

88

where does the superficial fibular nerve end

dorum of the foot

89

what does the superficial fibular nerve supply

fibulas longus and fibulas brevis

90

what does the superficial fibular nerve split into

medial dorsal cutaneous nerve and intermediate dorsal cutaneous nerve

91

what do the branches of the superficial fibular nerve supply

skin over the dorsum of the foot, except for the skin between the first 2 toes

92

what does the deep fibular nerve run inferior to

along the tibias anterior

93

where does the deep fibular nerve reach

dorsum of the foot

94

what does the deep fibular nerve supply

extensor muscles of the foot and toes

95

what specific muscles does the deep fibular nerve supply

tibialis anterior, extensor digitorum longus, extensor digitorum brevis, extensor hallucis longus, extensor hallucis brevis, fibularis tertius

96

what does the deep fibular nerve supply sensory-wise

skin between the first 2 toes

97

what is steppage gait

inability to dorsiflex

98

what nerve causes stoppage gait

deep fibular nerve

99

what fibers form the tibial nerve

L4-S3

100

what does the common fibular nerve supply

biceps femoris, semitendinosus, semimembranosus, adductor magnus

101

what does the tibial nerve give off in the popliteal fossa

articular branches that supply the knee joint, muscular branches, popliteal branch and medial sural cutaneous nerve

102

what does the tibial nerve supply in the popliteal fossa

popliteus, gastrocnemius, soleus, plantaris

103

what does the popliteal branch eventually turn into

interosseous nerve of the leg

104

what does the interosseous nerve of the leg supply

tibial periosteum, ankle, and tibiofibular joints

105

what does the tibial nerve supply in the leg

flexor digitorum longus, flexor hallucis longus, tibialis posterior

106

what does the medial calcaneal branches supply

skin over the medial heel and sole of the foot

107

what does the tibial nerve travel around

the medial malleolus

108

what does the tibial nerve split into

medial plantar nerve and lateral plantar nerve

109

what does the medial plantar nerve supply

abductor hallucis, flexor digitorum brevis, flexor hallucis brevis

110

what does the medial plantar nerve supply

common plantar digital nerves

111

what does the common plantar digital nerves supply motor-wise

lumbricals 1 and 2

112

what does the common plantar digital nerves supply sensory-wise

skin between the toes

113

how does the common plantar digital nerves supply the skin between the toes

via proper plantar digital nerves

114

what does the lateral plantar nerve divide into

superficial and deep branches

115

what does the superficial branch of the lateral plantar nerve supply

skin around the 5th digit

116

what does the deep branch of the lateral plantar nerve supply

adductor hallucis, flexor digiti minimi brevis, abductor digiti minimi, quadratus plantae, lateral lumbricals and interossei muscles

117

what nerve causes flexor paralysis

tibial nerve

118

what is flexor paralysis

ability to curl toes against resistance

119

what are hammer toes

shortening of tendons