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-ABPMR Board Review > LE innervations > Flashcards

LE innervations Flashcards

1
Q

lumbosacral plexus

A

L4 - S3 (+S4)

sciatic n. (L4, L5, S1, S2, S3) → common peroneal and tibial n.

four branches, each 3 from 3 spinal n. roots

  1. superior gluteal (L4, L5, S1) → gluteus medius and minimus, TFL
  2. inferior gluteal (L5, S1, S2) → gluteus maximus
  3. posterior cutaneous n. thigh (S1, S2, S3)
  4. pudendal n. (S2, S3, S4)
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2
Q

L2, L3, L4 → femoral n. → [muscles]

A

L2, L3, L4 → femoral n. → quads, iliopsoas

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3
Q

[roots] → [nerve] → quads, iliopsoas

A

L2, L3, L4 → femoral n. → quads, iliopsoas

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4
Q

L2, L3, L4 → obturator n. → [muscles]

A

L2, L3, L4 → obturator n. → adductor, gracilis

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5
Q

[roots] → [nerve] → adductor, gracilis

A

L2, L3, L4 → obturator n. → adductor, gracilis

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6
Q

L4, L5 → sciatic n. → deep fibular → [muscles]

A

L4, L5 → sciatic n. → deep fibular → tibialis anterior (TA), extensor digitorum longus (EDL)

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7
Q

[roots] → [nerve] → [nerve] → tibialis anterior (TA), extensor digitorum longus (EDL)

A

L4, L5 → sciatic n. → deep fibular → tibialis anterior (TA), extensor digitorum longus (EDL)

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8
Q

L4, L5, S1 → sciatic n. (tibial division) → [muscles]

A

L4, L5, S1 → sciatic n. (tibial division) → semimembranosus, semitendinosus, long head of biceps femoris

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9
Q

[roots] → [nerve] → semimembranosus, semitendinosus, long head of biceps femoris

A

L4, L5, S1 → sciatic n. (tibial division) → semimembranosus, semitendinosus, long head of biceps femoris

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10
Q

L5, S1 → sciatic n. (fibular division) → [muscle]

A

L5, S1 → sciatic n. (fibular division) → short head of biceps femoris

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11
Q

[roots] → [nerve] → short head of biceps femoris

A

L5, S1 → sciatic n. (fibular division) → short head of biceps femoris

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12
Q

L4, L5, S1 → superior gluteal n. → [muscle]

A

L4, L5, S1 → superior gluteal n. → gluteus medius, gluteus minimus, TFL

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13
Q

[roots] → [nerve] → gluteus medius, gluteus minimus, TFL

A

L4, L5, S1 → superior gluteal n. → gluteus medius, gluteus minimus, TFL

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14
Q

L5, S1 → sciatic n. → superficial fibular n. → [muscle]

A

L5, S1 → sciatic n. → superficial fibular n. → fibularis longus, fibularis brevis

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15
Q

[roots] → [nerve] → [nerve] → fibularis longus, fibularis brevis

A

L5, S1 → sciatic n. → superficial fibular n. → fibularis longus, fibularis brevis

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16
Q

L5, S1 → sciatic n. → tibial n. → [muscle]

A

L5, S1 → sciatic n. → tibial n. → tibialis posterior (TP), flexor digitorum longus (FDL)

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17
Q

[roots] → [nerve] → [nerve] → tibialis posterior (TP), flexor digitorum longus (FDL)

A

L5, S1 → sciatic n. → tibial n. → tibialis posterior (TP), flexor digitorum longus (FDL)

18
Q

L5, S1, S2 → inferior gluteal n. → [muscle]

A

L5, S1, S2 → inferior gluteal n. → gluteus maximus

19
Q

[roots] → [nerve] → [nerve] → gluteus maximus

A

L5, S1, S2 → inferior gluteal n. → gluteus maximus

20
Q

S1, S2 → sciatic n. → tibial n. → [muscle]

A

S1, S2 → sciatic n. → tibial n. → gastrocnemius, soleus

21
Q

[roots] → [nerve] → [nerve] → gastrocnemius, soleus

A

S1, S2 → sciatic n. → tibial n. → gastrocnemius, soleus

22
Q

S1, S2 → sciatic n. → tibial n. → medial plantar n. → [muscle]

A

S1, S2 → sciatic n. → tibial n. → medial plantar n. → flexor hallucis brevis (FHB), abductor hallucis brevis (AHB)

23
Q

[roots] → [nerve] → [nerve] → [nerve] → flexor hallucis brevis (FHB), abductor hallucis brevis (AHB)

A

S1, S2 → sciatic n. → tibial n. → medial plantar n. → flexor hallucis brevis (FHB), abductor hallucis brevis (AHB)

24
Q

S1, S2 → sciatic n. → tibial n. → lateral plantar n. → [muscle]

A

S1, S2 → sciatic n. → tibial n. → lateral plantar n. → abductor digiti quinti pedis (ADQP)

25
Q

[roots] → [nerve] → [nerve] → [nerve] → abductor digiti quinti pedis (ADQP)

A

S1, S2 → sciatic n. → tibial n. → lateral plantar n. → [muscle]

26
Q

L2, L3 → lateral femoral cutaneous n. → [cutaneous]

A

L2, L3 → lateral femoral cutaneous n. → lateral thigh

27
Q

[roots] → [nerve] → lateral thigh

A

L2, L3 → lateral femoral cutaneous n. → lateral thigh

28
Q

L2, L3, L4 → femoral n. → saphenous n. → [cutaneous]

A

L2, L3, L4 → femoral n. → saphenous n. → medial shin, medial calf

29
Q

L2, L3, L4 → femoral n. → saphenous n. → medial shin, medial calf
[roots] → [nerve] →[nerve] → medial shin, medial calf

A

L2, L3, L4 → femoral n. → saphenous n. → medial shin, medial calf

30
Q

L4, L5 → sciatic n. → tibial n. → medial plantar n. → [cutaneous]

A

L4, L5 → sciatic n. → tibial n. → medial plantar n. → medial plantar surface of foot

31
Q

[roots] → [nerve] → [nerve] → [nerve] → medial plantar surface of foot

A

L4, L5 → sciatic n. → tibial n. → medial plantar n. → medial plantar surface of foot

32
Q

S1, S2 → sciatic n. → tibial n. → lateral plantar n. → [cutaneous]

A

S1, S2 → sciatic n. → tibial n. → lateral plantar n. → lateral plantar surface of foot

33
Q

[roots] → [nerve] → [nerve] → [nerve] → lateral plantar surface of foot

A

S1, S2 → sciatic n. → tibial n. → lateral plantar n. → lateral plantar surface of foot

34
Q

innervation of dorsum of foot

A

superficial fibular n. except 1st web space (deep fibular n.)

35
Q

tarsal tunnel

A

“Tom Dick And Very Nervous Harry”

medial malleolus, flexor retinaculum

anterior → posterior: TP, FDL, tibial a./v./n., FHL

tibial nerve splits → medial and lateral plantar n., inferior calcaneal n.

36
Q

tibial n. → medial plantar n. → [muscles]

A

tibial n. → medial plantar n. → AH, FDB, FHB, 1st lumbrical; medial plantar sensation

37
Q

tibial n. → lateral plantar n. → [muscle]

A

tibial n. → lateral plantar n. → ADQP, interossei, all other lumbricals (2,3,4); lateral plantar sensation

38
Q

[roots] → [division] → femoral n. → ?

A

L2, L3, L4 → posterior division lumbar plexus → femoral n. → quadriceps + skin over quads/anterior thigh → saphenous n. → cutaneous inn. medial leg

39
Q

thigh cutaneous innervation

A

medial: obturator
anterior: femoral (continues as saphenous n. → medial leg)
lateral: lateral femoral cutaneous n.; nothing to do with femoral n., totally separate branch of lumbosacral plexus

40
Q

lumbosacral plexus

A

L1-S4 ventral rami

dorsal rami → paraspinals

lumbar plexus: L1-L4
anterior division → obturator n.
posterior division → femoral n. (L2,3,4) and LFCN (L2,3) → saphenous SNAP, LFCN SNAP, femoral n. CMAP

sacral plexus: L4-S4
→ sciatic n.
anterior division → tibial n. → sural SNAP, plantar SNAP, AH CMAP
posterior division → common fibular n. → superficial fibular SNAP, EDB CMAP

superior and inferior gluteal n. come directly off sacral plexus

-ABPMR Board Review (19 decks)

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