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PNS Cervical and Brachial Plexuses > Lumbar plexus > Flashcards

Lumbar plexus Flashcards

0
Q

how does the lumbar plexus receive contribution from T12

A

by communication with the L1 nerve

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1
Q

what forms the lumbar plexus

A

anterior primary rami of L1-L3 and part of L4

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2
Q

what muscles are supplied by the muscular branches of the anterior primary rami of the lumbar plexus

A

quadratus lumborum, psoas major and psoas minor

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3
Q

L1 muscular branches will supply what muscles

A

quadratus lumborum and psoas minor

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4
Q

L2 muscular branches will supply what muscles

A

quadratus lumborum and both psoas muscles

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5
Q

L3 and L4 muscular branches will supply what muscles

A

quadratus lumborum and psoas major

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6
Q

the iliohypogastric nerve contains fibers from what spinal nerves

A

T12 and L1

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7
Q

after the iliohypogastric nerve gives off the lateral cutaneous branch what does it continue as

A

the anterior cutaneous branch

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8
Q

what does the anterior cutaneous branch (from the iliohypgsatric nerve) supply

A

skin of the pubic region

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9
Q

what does the lateral cutaneous branch of the iliohypogastric nerve supply

A

posterolateral gluteal region

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10
Q

what roots make up the ilioinguinal nerve

A

T12 and L1

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11
Q

what does the ilioinguinal nerve supply with sensory innervation

A

skin of the upper medial thigh, base of penis, anterior scrotum (in males), mons pubis and labium majus (in females)

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12
Q

what muscles does the ilioinguinal nerve supply

A

internal abdominal oblique muscle , and transverse abdominal muscles

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13
Q

what muscles does the iliohypogastric nerve supply

A

internal abdominal oblique, and transverse abdominal

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14
Q

what roots is the genitofemoral nerve composed of

A

L1 and L2

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15
Q

what two branches does the genitofemoral nerve divide into

A

gential branch and femoral branch

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16
Q

what does the genital branch of the genitofemoral nerve supply with motor innervation

A

cremaster muscle

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17
Q

what does the genital branch of the genitofemoral nerve supply with sensory innervation

A

skin of the superior-anterior scrotum(in males), skin of the mons pubs and labium majus(in females)

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18
Q

what does the femoral branch of the genitofemoral nerve supply

A

skin of the upper anterior thigh

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19
Q

what roots is the lateral cutaneous nerve of the thigh composed of

A

L2 and L3

20
Q

what does the lateral cutaneous nerve of the thigh supply

A

skin of the lateral thigh, superior to the knee

21
Q

what is the largest branch of the lumbar plexus

A

femoral nerve

22
Q

what roots is the femoral nerve composed of

A

L2,L3, and L4

23
Q

what branches does the femoral nerve give off in the abdomen

A

muscular branches to the iliacus and the pectineus as well as a few fibers to the femoral A.

24
Q

what are the 3 nerves that arise from the anterior division of the femoral nerve

A

the intermediate cutaneous nerve of the thigh, the medial cutaneous nerve of the thigh, and the nerve to the sartorius

25
Q

what does the intermediate cutaneous nerve of the thigh supply

A

skin on the anterior thigh down to the knee

26
Q

what will the lateral branch of the intermediate cutaneous nerve of the thigh communicate with

A

the femoral branch of the genitofemoral nerve

27
Q

what does the medial cutaneous nerve of the thigh supply

A

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

28
Q

the medial cutaneous nerve of the thigh communicates with the saphenous nerve to supply what?

A

skin of the medial leg through communications with the saphenous nerve

29
Q

what muscle does the nerve to the sartorius supply

A

the sartorius

30
Q

what muscles does the posterior division of the femoral nerve innervate

A

sartorius, and quadriceps (rectus femoris, vastus lateralis, vastus medialis, vastus intermedialis)

31
Q

what does the vascular branches of the posterior division supply

A

the femoral artery and its branches

32
Q

what does the saphenous nerve supply

A

skin medial and anterior to the patella, skin of the medial leg and foot

33
Q

what nerve is the patellar reflex testing

A

femoral nerve

34
Q

in most cases what do sensory dificits in the lumbars going to relate back to

A

disc issues

35
Q

what roots make up the obturator nerve

A

L2,L3, an L4

36
Q

what is the principal contributor to the obturator nerve

A

L3

37
Q

after the obturator nerve splits into an anterior and posterior branch what separates them

A

initially the obturator externus and then the adductor brevis

38
Q

branches that are sent from the obturator nerve to communicate with the femoral nerve form what?

A

the subsartorial plexus

39
Q

what does the subsartorial plexus contribute to

A

the skin on the medial thigh

40
Q

what does the terminal portion of the anterior branch of the obturator nerve supply

A

the femoral artery

41
Q

the anterior branch of the obturator nerves sends articular branches to what joint

A

the hip joint

42
Q

the anterior branch of the obturator nerves sends muscular branches to what muscles

A

adductor longus, gracilis, pectineus (usually), adductor brevis(usually)

43
Q

if the accessory obturator nerve is present what may send fibers to connect with it

A

the anterior branch of the obturator nerve

44
Q

if the anterior branch of the obturator nerves sends fibers to communicate with the medial cutaneous nerve of the thigh and the saphenous nerve what will it contribute supply to

A

the skin on the upper medial side of the leg

45
Q

what muscles does the posterior branch of the obturator nerve supply

A

obturator externus and adductor magnus as well as the adductor brevis if it is not already supplied by the anterior branch

46
Q

what joint does the posterior branch of the obturator n send articular fibers to

A

the knee joint

47
Q

what are clinical considerations associated with the lumbar plexus

A

muscular weakness, and sensory deficits

PNS Cervical and Brachial Plexuses (9 decks)

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