Lower Extremity Innervations

Question 1

quads, iliopsoas

Answer 1

L2, L3, L4; femoral nerve

Question 2

adductors, gracilis

Answer 2

L2, L3, L4; obturator nerve

Question 3

tibialis anterior (TA), extensor digitorum longus (EDL)

Answer 3

L4, L5; sciatic nerve; deep fibular nerve

Question 4

extensor hallucis longus (EHL), extensor digitorum brevis (EDB)

Answer 4

L4, L5, S1; sciatic nerve; deep fibular nerve

Question 5

semimembranosus, semitendinosus, long head of biceps femoris

Answer 5

L4, L5, S1; sciatic nerve (tibial division)

Question 6

short head of biceps femoris

Answer 6

L5, S1; sciatic nerve (fibular division)

Question 7

gluteus medius, gluteus minimus, tensor fascia lata (TFL)

Answer 7

L4, L5, S1; superior gluteal nerve

Question 8

fibularis longus, fibularis brevis

Answer 8

L5, S1; sciatic nerve; superficial fibular nerve

Question 9

tibialis posterior (TP), flexor digitorum longus (FDL)

Answer 9

L5, S1; sciatic nerve; tibial nerve

Question 10

gluteus maximus

Answer 10

L5, S1, S2; inferior gluteal nerve

Question 11

gastrocnemius, soleus

Answer 11

S1, S2; sciatic nerve; tibial nerve

Question 12

flexor hallucis brevis (FHB), abductor hallucis brevis (AHB)

Answer 12

S1, S2; sciatic nerve; tibial nerve; medial plantar nerve

Question 13

abductor digiti quinti pedis (ADQP)

Answer 13

S1, S2; sciatic nerve; tibial nerve; lateral plantar nerve

Question 14

lateral thigh

Answer 14

L2, L3; lateral femoral cutaneous nerve

Question 15

medial shin, medial calf

Answer 15

L2, L3, L4; femoral nerve; saphenous nerve

Question 16

medial plantar surface of foot

Answer 16

L4, L5; sciatic nerve; tibial nerve; medial plantar nerve

Question 17

lateral plantar surface of foot

Answer 17

S1, S2; sciatic nerve; tibial nerve; lateral plantar nerve