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PNS > Lumbar Plexus > Flashcards

Lumbar Plexus Flashcards

1
Q

What nerves form the lumbar plexus?

A

anterior primary rami of T12-L3, part of L4

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2
Q

How does the lumbar plexus receive fibers from T12?

A

communication with the L1 nerve

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3
Q

What muscles do L1 anterior primary rami supply?

A

quadratus lumborum and psoas minor

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4
Q

What muscles do L2 anterior primary rami supply?

A

quadratus lumborum and both psoas minor and major

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5
Q

What muscles do L3 and L4 anterior primary rami supply?

A

quadratus lumborum and psoas major

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6
Q

which nerve contains fibers from T12 and L1

A

Iliohypogastric nerve and Ilioinguinal Nerve

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7
Q

What branch does the iliohypogastric nerve give off?

A

lateral cutaneous brach

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8
Q

What does the lateral cutaneous branch supply?

A

sensory to the posterolateral gluteal region

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9
Q

After the lateral cutaneous branches off, what does the iliohypogastric nerved become?

A

the anterior cutaneous branch

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10
Q

What does the anterior cutaneous branch supply?

A

sensory to the skin of the pubic region

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11
Q

What two muscles does the iliohypogastric nerve supply?

A

internal abdominal oblique and transverse abdominal

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12
Q

What is the sensory function of the ilioinguinal nerve?

A

skin of the upper medial thigh
base of penis
anterior scrotum
mons pubis and labium majus

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13
Q

what muscles do the ilioinguuinal nerve supply?

A

internal abdominal oblique and transverse abdominal muscle

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14
Q

What nerve contains fibers from L1 and L2?

A

Genitofemoral nerve

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15
Q

After passing through the psoas major, the Genitofemoral nerve divides into which two branches?

A

the genital and femoral branches

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16
Q

What does the Genitofemoral nerve pass through before branching off?

A

the psoas major

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17
Q

Which Genitofemoral branch passes through the inguinal ligament?

A

Genital branch

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18
Q

what muscle does the genital branch supply?

A

Cremaster muscle

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19
Q

What is the sensory function of the genital branch?

A

superior anteriro scrotum

skin of the mons pubis and labium magus

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20
Q

What does the femoral branch supply?

A

sensory to the skin of the anterior upper thigh

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21
Q

How does the femoral branch get into the posterior thigh?

A

passes through the posterior to inguinal ligament

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22
Q

Which nerve contains fibers from L2 and L3?

A

Lateral cutaneous Nerve of the Thigh

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23
Q

What does the lateral cutaneous nerve of the thigh supply?

A

sensory to the skin on the lateral thigh and superior knee

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24
Q

How does the lateral cutaneous nerve of the thigh leave the body cavity?

A

it passes under the inguinal ligament

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25
Q

What is the largest nerve of the lumbar plexus?

A

the femoral nerve

26
Q

What nerve fibers does the femoral nerve contain?

A

L2, L3, L4

27
Q

Other than the femoral nerve, what other nerve contains nerve fibers L2, L3, L4?

A

the obturator nerve

28
Q

What artery does the femoral nerve supply?

A

the femoral artery

29
Q

In the abdomen, what does the femoral nerve supply?

A

iliacus and pectineus

30
Q

After passing posterior to the inguinal ligament, the femoral nerve divides into which two divisions?

A

anterior and posterior division

31
Q

What three nerves does the anterior divisions of the femoral nerve give rise to?

A

Intermediate cutaneous Nerve of the thigh
Medial cutaneous nerve of the thigh
nerve to the sartorius

32
Q

What does the intermediate nerve of the thigh supply?

A

sensory to the skin on the anterior thigh down to the knee

33
Q

What nerve does the intermediate nerve of the thigh communicate with?

A

genitofemoral nerve

34
Q

How does the intermediate nerve of the thigh communicate with the genitofemoral nerve?

A

the lateral branch of the intermediate nerve of the thigh

35
Q

Where does the medial cutaneous nerve of the thigh cross in relationship to the femoral artery?

A

anterior

36
Q

What does the medial cutaneous nerve of the thigh supply?

A

sensory to the skin other the medial thigh, medial one, and knee across the lateral side of the patella

37
Q

The medial cutaneous nerve of the thigh supplies sensory for the skin of the medial leg through communication of what other nerve?

A

saphenous nerve

38
Q

What muscle does the sartorius supply?

A

the sartorius muscle

39
Q

What do the muscular branches of the posterior division of the femoral nerve supply?

A 
sartorius, 
rectus femorus, 
vastus lateralis
vastus medialis
vastus intermedius
40
Q

what do the vascular branches of the posterior division of the femoral nerve supply?

A

the femoral artery and its branches

41
Q

After the knee joint, what happens to the posterior division of the femoral nerve?

A

it branches and continues as the saphenous nerve

42
Q

Where does the posterior division of the femoral nerve branch before continuing as the saphenous nerve?

A

after the adductor canal

`

43
Q

Where does the saphenous nerve lie in relationship to the femoral after?

A

medial

44
Q

What does the saphenous nerve supply?

A

sensory to the skin medial and anterior to the patella

and medial leg and foot

45
Q

What does the saphenous nerve travel with in the leg?

A

the great saphenous vein

46
Q

What are clinical considerations of the femoral nerve?

A

Patellar reflex and sensory deficits

47
Q

What is the principle contributor to the obturator nerve?

A

L3; L2 contribution is minimal

48
Q

The obturator muscle travels medial to what muscle and posterior to which vein

A

psoas major; common iliac vein

49
Q

after descending through the pelvis, what dos the obturator muscle travel along?

A

obturator internus

50
Q

How does the obturator nerve leave the pelvis?

A

obturator foramen

51
Q

After leaving the obturator foramen, the obturator splits into?

A

anterior and posterior branches

52
Q

What are the anterior and posterior branches separated by?

A

obturator externus and adductor brevis

53
Q

What does the termination of the anterior branch supply?

A

femoral artery

54
Q

What forms the sub sartorial plexus?

A

the anterior branch of the obturator nerve and branches of the femoral nerve

55
Q

What does the sub sartorial plexus supply?

A

sensory to the skin on the medial thigh

56
Q

What does the articular branches of the anterior branch of the obturator nerve supply?

A

the hip joint

57
Q

What muscles do the anterior branch of the obturator nerve supply?

A

obturator externus
adductor magnus
adductor brevis

58
Q

Fibers from the obturator nerve connect with what other nerves to supply the skin of the upper medial side of the leg?

A

accessory obturator nerve
medial cutaneous nerve of the thigh
saphenous nerve

59
Q

What muscles does the posterior branch of the obturator nerve supply?

A

obturator externus
adductor magnus
adductor brevis

60
Q

What articular fibers of the posterior branch of the obturator nerve supply?

A

the knee joint

61
Q

What are clinical considerations of the obturator nerve?

A

muscular weakness and sensory deficit

PNS (11 decks)

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