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Anatomy 315 > lecture 18: lumbosacral plexus > Flashcards

lecture 18: lumbosacral plexus Flashcards

1
Q

cervical and lumbar enlargements correspond with what

A

plexuses involved in providing innnervation to the limbs

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2
Q

what is the cervical enlargement of the spinal cord

A

brachial plexus (c5-T1)

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3
Q

what is the lumbar enlargment of the spinal cord

A

lumbosacral plexus )l1-s4)

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4
Q

the lumbosacral plexus is derived from the anterior or posterior rami of l1-s4

A

anterior

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5
Q

the lumbosacral plexus is derived from the anterioi of blank

A

L1-S4

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6
Q

the lumbar plexus part includes what neres

A

L1-L4 (and t12 intercostal)

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7
Q

the sacral plexus part includes what nerves

A

L4-S4

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8
Q

the lumbar plexus provides cuteanous innervation to what

A

to anterior and medial thigh
anterior knee
medial leg and foot

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9
Q

the lumbar plexus provides motor innevation to what

A

anterior and medial compartments of the thigh

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10
Q

true or false: the lumbar plexus is assocated the cuteanous and motor innervation for the posterior thigh

A

false, the anterior and media

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11
Q

the sacral plexus provides cuteanous innervation to what

A

lower buttocks (inf cuneal),
posterior thigh and leg (post cut femoral)
lateral leg and majority of the foot

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12
Q

the sacral plexus provides motor innervation to what

A

gluteal region
posterior thigh
compartments of the leg and foot

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13
Q

the posterior thigh receives motor inneravtion from the lumbar or sacral plexus

A

sacral

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14
Q

which region of the lumbosacral plexus innevates (motor) the gluteal region

A

the sacral plexus (L4-S4)

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15
Q

what are the nerves of the lumbar plexus (names )

A

iliohypogastric
ilioinguinal
genitofemoral

obturator n
lateral femoral cutaneous
femoral

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16
Q

what nerves does iliohypogastric come from

A

T12-L1

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17
Q

what nerves does ilioinguinal come from

A

L1

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18
Q

what nerves does genitofemoral come from

A

L1-L2

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19
Q

what 3 nerves provide most sensory innervation around the ground and lateral aspect of the hip from the lumnar plexius

A

iliohypogastric
ilioinguinal
genitofemoral

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20
Q

what nerves does obtutrator come from

A

L2-L4

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21
Q

what what nerves does lateral femoral cutaneous come from

A

L2_L3

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22
Q

what nerves does femoral come from

A

L2-:4

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23
Q

femoral n is responsible for the anterior or posterior compartment of the thigh

A

anterior

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24
Q

what are the names of the nerves in the sacral plexus

A

lumbosacral trunk
superior and ifnerior gluteal n
pudendal
posterior femoral cutaneous
sciatic n

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25
Q

what nerves does lumbosacral trunk come from

A

L4-L5

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26
Q

what nerves does superior gluteal come from

A

L4-S1

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27
Q

what nerves does inferior gluteal n come from

A

L5-S2

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28
Q

what is the lcoation of superior and inferior gluteal nerves

A

above and brlow the piriformis muscle

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29
Q

what nerves does posteior femoral cuteanous come from

A

S1-S3

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30
Q

what nerves does sciatic come from

A

L4-S3

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31
Q

sciatic n is more responsible for anterior or posterior thigh

A

posteiror

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32
Q

what are the 3 main spcaes i nthe inguinal region

A

1) muscular component
2) vascular components
3) inguinal canal

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33
Q

what is the inguinal canal

A

fascia canal acting as a conduit or tunnel between internal pelvis and external genitalia and surrounding skin

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34
Q

what are the muscles and contents of the muscular component of the inguinal region

A

iliopsoas
lateral femoral cuteanous n of the thigh
femoral n

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35
Q

what are the contenous of the vascular component of the inguinal region

A

femoral a and v
genitofemoral n (femoral branch)

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36
Q

wjat are the contents of the inguinal canal

A

inlioinguinal n
genitofemoral n (genital branch)
speramatic cord(male) or ligament of uterus (female)

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37
Q

the femoral branch of the genitofemoral n is located in which component

A

vascular

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38
Q

the inguinal canal is superior or inferior to inguinal lig

39
Q

be able to locate the different ingunual regions

40
Q

iliohypogastric, ilioinguinal and genitofemoral nerves are derived from what spinal n

41
Q

which nerves pierces the psoas major

A

genitofemoral n

42
Q

iliohypogastric and ilioinguinal supply motor innervation to what

A

lower internal obliques and tranversus abdominus

43
Q

what are the two bracnhes of the iliohypogastric n and where they run

A

anterior branch (near inguinal lig)
lateral branch (near TFL)

44
Q

be able to locate the IH IL and genitofemoral

45
Q

which nerves travels in the inguinal canal

A

ilioinguinal n and genitofemoral (genital branch)

46
Q

which nerve travels in the vascular compartment

A

genitofermoal (femoral branch)

47
Q

what are the two branches of the genitofemoral n

A

genital and femoral barnch

48
Q

the genital barnch of the genitofemoral joins what other n and what does it supply

A

ilioinguinal and supplies scrotum and labia

49
Q

which nerve travels under the inguinal ligament

A

the femoral branch of the genitofemoral n

50
Q

what is the motor innervation of the genitofemoral n

A

cremaster in spermatic cord

51
Q

true or false: the ilioinguinal n pierces the psaoas major

A

false, the genitofemoral n

52
Q

what is the senrosry innervation of the IH, IL and GF (in general)

A

skin over the upper lateral thigh and inguinal region (IH)
anterior and medial thigh (GF, IL)
scrotum/labia (GF, IL)

53
Q

true or false: the lateral cutanous femoral is derived from L1 to L3

54
Q

explain the sensory innevation for the lateral cuteanous femoral (l2-L3)

A

to skin over lateral thigh, down to knee (including over fascia lata, and near gretter trochanter of femur)

55
Q

true or false: the lateral femoral cuteanous n pases below the inguinal lig

56
Q

obturator n travels through what forament

A

obturator n

57
Q

true or false: obturator n is derived from L2-:4

58
Q

what is the motor innervation of the obturator n

A

medial compartment of the thigh (Adductors and gracilis)
obturator externus

59
Q

what are the two branches of the obturator n

A

posterior and anterior branch

60
Q

what branch of the obturator n innervaties the obturator externus

A

posterior branch

61
Q

what is the senosry innevartion of the obturator n

A

cutaneous: skin of medial thigh

also sensory from hip joint capsule

62
Q

explain the motor innervation of the femoral n

A

anterior compoartment of the thigh (flexors of the hip, externsors of the knee)
and pectineus from medial compartment of thgih

63
Q

true or false: femoral n supplies only the muscles of the anterior compartment of the thigh

A

false, anterior compartment and medial compartment because of pectineus

64
Q

explain the sensory innervation of the femoral n

A

anterior thigh and medial leg/foot through 2 branches

65
Q

where does femoral n travel

A

b/w psoas and illiacus, under the inguinal lig

66
Q

true or false: the femoral n travels between psoas and illiacus, above the inguinal lig

A

false, under

67
Q

the saphenous n is parallel to what other vessel

A

saphenous v

68
Q

what are the 2 major barnches of the femoral n

A

anterior cuteanous n
saphenous n

69
Q

how does the sapnous n travels

A

travels with great saphenous vein along medial leg

70
Q

understand the lumbar plexus summary slide

71
Q

true or false; the sacral plexus supplies the gluteals

72
Q

superior gluteal n supplies what muscels

A

glute med
glute min
tensor fascia lata

73
Q

superior gluteal n comes from what n

74
Q

what muscle does inferior gluteal inneavte

75
Q

true or flse: glute max is inneravted by the superior gluteal n

A

false, ingerior

76
Q

tru or false: gluteal nerves both provide motor innevation to the gluteal muscles

77
Q

be able to locate the glutean l n

78
Q

sciatic n provides motor inervation to what

A

motor to hip extensors and knee flexors
branches to all distal muscles

79
Q

sciatic n provides sensory inervation to what

A

distal limb below knee

80
Q

inferior cluneal n is a branch of what

A

posterior cutaneous femoral

81
Q

what nerve is medial to sciatic n

A

posterior cuteanous femoral n

82
Q

where are sural nerves

A

below knee

83
Q

what are sural n

A

sensory nervous from distal branches of sciatic n

84
Q

what are the 2 divisions of the sciatic that can be traced back to the greater sciatic formanet

A

tibial
common fibular

85
Q

the 2 divisions of the sciatic can be traced back to where

A

the greater sciatic formanet

86
Q

the tibial n is derived from what spinal n

87
Q

the common fibular n is derived from what spinal n

88
Q

which branch of the sciatic n is the most lateral

A

common fibular

89
Q

what is the motor innevation of the sciatic proper

A

posterior compartment of the thigh (hamstrings)

90
Q

what is the motor innevation of the terminal branches of the sciatic

A

motor sensory
extend fown to into leg and foot

91
Q

be able to understand the sicatic n near popliteal fossa

92
Q

true or false: the sural nerves are purely cuteanous

93
Q

medial and lateral sural n combine to form what

94
Q

what do the sural nerves provide cuteanous innevation to

A

posterior and lateral leg and lateral foot

Anatomy 315 (25 decks)

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