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PNS > Exam 3: Lumbar Plexus > Flashcards

Exam 3: Lumbar Plexus Flashcards

1
Q

Lumbar plexus formed by

A

Anterior primary rami of L1-3, part of L4, part of T12

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2
Q

Muscular branches from anterior rami supply

A

Quadratus lumborum
Psoas major
Psoas minor

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3
Q

Muscular branch of L1 supplies

A

Quadratus lumborum

Psoas minor

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4
Q

Muscular branch of L2 supplies

A

Quadratus lumborum

Both psoas

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5
Q

L3 and L4 muscular branches supply

A

Quadratus lumborum

Psoas major

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6
Q

Iliohypogastric N contains fibers from

A

T12 and L1

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7
Q

Iliohypogastric N travels ant/inf between

A

Quadratus lumborum and kidney

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8
Q

Iliohypogastric N travels through ____ and travels between it and ___

A

Transverse abdominal muscle; internal oblique

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9
Q

Iliohypogastric gives off a ____ which supplies the posteriorlateral gluteal region

A

Lateral cutaneous branch

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10
Q

Iliohypogastric N continues as ___ which supplies skin of pubic region

A

Anterior cutaneous branch

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11
Q

Iliohypogastric N supplies these muscles

A

Internal oblique

Transverse abdominal

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12
Q

Ilioinguinal N contains fibers from

A

T12 and L1

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13
Q

Ilioinguinal N is transmitted through ___ and travels w/ ___

A

Inguinal canal; spermatic cord (round lig)

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14
Q

Ilioinguinal N supplies these muscles

A

Internal oblique

Transverse abdominal

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15
Q

Genitofemoral N contains fibers from

A

L1 and L2

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16
Q

Genitofemoral N passes anteriorward through ___ and divides into ___

A

Psoas major

Genital and femoral branches

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17
Q

Genital branch enters and travels through

A

Inguinal canal

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18
Q

After leaving canal genital branch provides motor supply to ___ and sensory to ___

A

Cremaster

Skin of sup/ant scrotum - males
Skin of mons pubis/labia majus - females

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19
Q

Femoral branch of genitofemoral passes into the thigh ___ to inguinal lig

A

Posterior

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20
Q

Femoral branch of genitofemoral supplies

A

Skin of upper anterior thigh

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21
Q

Lateral cutaneous N of thigh contains fibers from

A

L2 and L3

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22
Q

Lateral cutaneous N of thigh supply

A

Skin of lateral thigh (superior to knee)

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23
Q

Lateral cutaneous N of thigh leave ab cavity by passing _____, travels anterior to ___ and through ____

A

Under inguinal lig; sartorius; fascia lata

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24
Q

Largest branch in lumbar plexus ____ contains fibers from _____

A

Femoral N

L2, 3, 4

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25
Q

Femoral N forms posterior to ___ and emerges lateral to ___/anterior to ___

A

Psoas major; psoas; iliacus

26
Q

Femoral N passes posterior to inguinal lig and enters femoral triangle lateral to

A

Femoral artery

27
Q

Femoral N runs inferior/medial through ___ and into leg, ___ to knee

A

Adductor canal; medial

28
Q

W/in abdomen, femoral N gives off muscular branches to

A

Iliacus and pectineus

Also some to femoral artery

29
Q

Beyond the inguinal lig, femoral N divides into

A

Anterior and posterior division

30
Q

Anterior division of femoral N gives rise to 3 nerves:

A

Intermediate cutaneous N of thigh
Medial cutaneous N of thigh
Nerve to sartorius

31
Q

Intermediate cutaneous N of thigh supplies skin on

A

Anterior thigh down to knee

32
Q

Medial cutaneous N of thigh crosses ___ to femoral artery

A

Anterior

33
Q

Medial cutaneous N of thigh supply

A

Skin of medial thigh, medial knee, knee across to lateral patella

34
Q

Nerve to sartorius supplies

A

Sartorius

35
Q

Posterior division of femoral N muscular branches

A 
Sartorius
Rectus femoris
Vastus lateralis
Vastus medialis
Vastus intermedialis
36
Q

Vascular branches of posterior division of femoral N supply

A

Femoral artery and its branches

37
Q

Femoral N continues into leg as

A

Saphenous N

38
Q

Saphenous N is transmitted through

A

Adductor canal

39
Q

Saphenous N in the adductor canal crosses the ____ so that the N lies ___ to the artery

A

Femoral artery; medial

40
Q

Saphenous N supplies the skin

A

Medial and anterior to patella

41
Q

In the leg, the saphenous N travels w/ the ____ and supplies ____

A

Great saphenous vein; skin of medial leg/foot

42
Q

Obturator N contains fibers from

A

L2, 3, 4

43
Q

Principal contributor to obturator N

A

L3

44
Q

Obturator N travels medial to ___, posterior to ___ and descends into pelvis on the ____

A

Psoas major; common iliac vessels; obturator internus

45
Q

Obturator N leaves pelvis through

A

Obturator foramen

46
Q

After leaving obturator foramen obturator N splits into

A

Anterior and posterior branches

47
Q

Anterior and posterior branches of obturator N separated initially by

A

Obturator externus then by adductor brevis

48
Q

Anterior branch of obturator N travels anterior to

A

Obturator externus and adductor brevis

49
Q

Anterior branch of obturator N travels posterior to

A

Pectineus and adductor longus

50
Q

Anterior branch of obturator N sends some branches to femoral N forming the

A

Subsartorial plexus

51
Q

Subsartorial plexus contributes to supply of

A

Skin on medial thigh

52
Q

Anterior branch of obturator N sends articular branches to

A

Hip joint

53
Q

Anterior branch of obturator N sends muscular branches to

A

Adductor longus
Gracilis
Pectineus
Adductor brevis

54
Q

Anterior branch of obturator N may send fibers to connect w/

A

Accessory obturator N

55
Q

Anterior branch of obturator N may send fibers to communicate w/

A

Medial cutaneous N of thigh

Saphenous N

56
Q

Posterior branch of obturator N travels through

A

Obturator externus

57
Q

Posterior branch of obturator N travels posterior to ____ and anterior to ____

A

Adductor brevis; adductor magnus

58
Q

Posterior branch of obturator N sends muscular branches to

A

Obturator externus

Adductor magnus

59
Q

Posterior branch of obturator N will supply this muscle if the anterior branch doesn’t

A

Adductor brevis

60
Q

Posterior branch of obturator N sends articular fibers to

A

Knee

PNS (24 decks)

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