Unit 2: Nerves of Lower Limb

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Last updated 2:37 AM on 2/4/26
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65 Terms

1
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What happens to ventral rami?

form plexuses

2
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What is a plexus?

multiple levels of nerves come together

3
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What plexuses are associated with the lower limb? What levels?

Lumbar (T12-L4) and Sacral Plexuses (L4-S4)

4
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Where does sacral plexus begin and lumbar plexus end?

Sacrum

5
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What are the levels of lumbar plexus?

T12-L4

6
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What nerves come off the lumbar plexus?

Obturator and Femoral Nerve

7
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What compartment does femoral nerve innervate? Any other muscles?

anterior thigh, half of pectineus muscle

8
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What compartment does obturator nerve innervate?

medial thigh

9
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What muscle does femoral nerve run superficial to? What ligament does it run deep to?

Iliacus muscle, inguinal ligament

10
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What is the most lateral content of the femoral triangle?

Femoral Nerve

11
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What are the levels of the femoral nerve?

L2-L4

12
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<p>Identify Yellow</p>

Identify Yellow

Femoral Nerve

13
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What compartment does the obturator nerve innervate?

Medial thigh

14
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What levels are the obturator nerve?

L2-L4

15
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Between what two muscles can you find the obturator nerve?

Adductor longus muscle and adductor brevis muscle

16
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What muscle in the pelvis does the obturator nerve run medial to?

psoas major muscle

17
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How does the obturator nerve enter the medial thigh?

Obturator Foramen

18
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<p>Identify</p>

Identify

Obturator Nerve

19
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What are the levels of the sacral plexus?

L4-S4

20
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What nerves come from sacral plexus?

Superior Gluteal Nerve, Inferior Gluteal Nerve, Sciatic Nerve, Tibial Nerve, Common Fibular Nerve, Deep Fibular Nerve, Superficial Fibular Nerve

21
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How does the superior gluteal nerve exit the pelvis?

Greater Sciatic Foramen

22
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What muscles does superior gluteal nerve run between?

gluteus medius and gluteus minimus

23
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Where is the superior gluteal nerve located in the posterior gluteal region?

Superior to Piriformis Muscle

24
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What muscles does superior gluteal nerve innervate?

Gluteus medius, gluteus minimus, tensor fasciae latae

25
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<p>Identify Thinner Yellow</p>

Identify Thinner Yellow

Superior Gluteal Nerve

26
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How does inferior gluteal nerve exit the pelvis?

Greater Sciatic Foramen

27
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Where is the inferior gluteal nerve located in the posterior gluteal region?

Inferior to piriformis muscle

28
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What muscle does inferior gluteal nerve run deep to?

Gluteus Maximus Muscle

29
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What muscle does inferior gluteal nerve innervate?

Gluteus Maximus Muscle

30
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<p>Identify Green</p>

Identify Green

Inferior Gluteal Nerve

31
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What is the biggest nerve in the body?

Sciatic Nerve

32
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What levels are the sciatic nerve?

L4-S3

33
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How does the sciatic nerve exit the pelvis?

Greater Sciatic Foramen

34
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Where is the sciatic nerve located in the posterior gluteal region?

Inferior to Piriformis Muscle

35
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Where does bifurcation of sciatic nerve occur?

Behind knee

36
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What does the sciatic nerve bifurcate into?

Common fibular nerve and tibial nerve

37
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<p>Identify Green</p>

Identify Green

Sciatic Nerve

38
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What division of sciatic nerve is medial?

Tibial Nerve

39
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Where can the tibial nerve be found in?

Popliteal Fossa

40
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What muscle compartments does tibial nerve innervate? Exceptions?

Posterior thigh (except biceps femoris short head), posterior leg

41
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What does tibial nerve bifurcate into to?

Medial and lateral plantar nerves

42
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<p>Identify Yellow going straight down</p>

Identify Yellow going straight down

Tibial Nerve

43
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Where does bifurcation of tibial nerve occur?

Deep to abductor hallucis muscle

44
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What muscle group do medial and lateral plantar nerves innervate?

Plantar foot muscles

45
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What muscles does medial plantar nerve innervate?

Abductor Hallucis Muscle, Flexor Digitorum Brevis Muscle

46
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What muscle does lateral plantar nerve innervate?

Abductor Digiti Minimi Muscle

47
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<p>Identify yellow</p>

Identify yellow

Medial Plantar Nerve

48
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<p>Identify grey</p>

Identify grey

Lateral Plantar Nerve

49
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What is the lateral division of the sciatic nerve?

Common Fibular Nerve

50
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What does the common fibular nerve bifurcate into?

Superficial fibular nerve, deep fibular nerve

51
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What muscle does the common fibular nerve innervate?

Biceps Femoris Short Head Muscle

52
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What does the common fibular nerve wrap around?

Head of Fibula

53
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<p>Identify</p>

Identify

Common Fibular Nerve

54
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What is the lateral division of the common fibular nerve?

Superficial Fibular Nerve

55
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Where is superficial fibular nerve found?

Between fibularis longus muscle and fibularis brevis muscle

56
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What muscle compartment does superficial nerve innervate?

Lateral Leg

57
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<p>Identify</p>

Identify

Superficial Fibular Nerve

58
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What is the medial division of the common fibular nerve?

Deep Fibular Nerve

59
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Where can you find the deep fibular nerve?

Between tibialis anterior muscle and extensor digitorum longus muscle

60
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What muscle compartments does deep fibular nerve innervate?

Anterior leg, dorsum of foot

61
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<p>Identify</p>

Identify

Deep Fibular Nerve

62
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What is foot drop?

Damage to common fibular nerve, patient would have anesthesia (numbness) on dorsum of the foot

63
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What leg muscle compartments foot drop affect?

Anterior and Lateral Leg, Dorsum of Foot

64
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Patient would be unable to ___ the ankle and ____ all digits due to damage to the deep fibular nerve

Dorsiflex, Extend

65
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Patient would be unable to ___ the foot due to damage to the deep and superficial fibular nerves

Evert

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