Innervation of the Muscles of the Lower Extremity

Question 1

Anterior Primary Rami L1-3

Answer 1

Psoas Major (L1-3)

Question 2

Femoral Nerve (L2-L4)

Answer 2

Iliacus (L2, L3)
Sartorius (L2, L3)
Pectineus (L2, L3)
Rectus Femoris (L2-L4)
Vastus Lateralis (L2-L4)
Vastus Medialis (L2-L4)
Vastus Intermedius (L2-L4)

Question 3

Obturator Nerve (L2-L4)

Answer 3

Adductor Longus (L2-L4)
Adductor Brevis (L2-L4)
Adductor Magnus:
- Adductor portion, L2-L4
- Hamstring portion, L4
Gracilis (L2-L3)
Obturator Externus (L3-L4)

Question 4

Inferior Gluteal Nerve (L5-S2)

Answer 4

Gluteus Maximum (L5-S2)

Question 5

Superior Gluteal Nerve (L5-S1)

Answer 5

Gluteus Medius (L5-S1)
Gluteus Minimus (L5-S1)
Tensor Fascia Lata (L5-S1)

Question 6

Narve to Piriformis (S1-S2)

Answer 6

Piriformis (S1-S2)

Question 7

Nerve to Obturator Internus (L5-S1)

Answer 7

Obturator Internus (L5-S1)
Superior Gemellus (L5-S1)

Question 8

Nerve to Quadratus Femoris (L5-S1)

Answer 8

Quadratus Femoris (L5-S1)
Inferior Gemellus (L5-S1)

Question 9

Sciatic: Tibial Nerve (L4-S3)

Answer 9

Semitendinosus

Question 10

Gluteus Maximus

Answer 10

Inferior gluteal nerve (L5, S1, S2)

Question 11

Gluteus Medius, Gluteus Minimus, Tensor Fascia Latae

Answer 11

Superior gluteal nerve (L5, S1)

Question 12

Piriformis

Answer 12

Nerve to piriformis (S1, S2)

Question 13

Superior Gemellus, Obturator Internus

Answer 13

Nerve to obturator internus (L5, S1)

Question 14

Quadratus Femoris, Inferior Gemellus

Answer 14

Nerve to quadratus femoris (L5, S1)

Question 15

Obturator Externus

Answer 15

Obturator nerve (L3, L4)

Question 16

Pectineus

Answer 16

Femoral nerve (L2, L3); may receive branch from obturator nerve

Question 17

Iliacus, Sartorius

Answer 17

Femoral nerve (L2, L3)

Question 18

Psoas Major

Answer 18

Anterior rami of lumbar nerve (L1, L2, L3)

Question 19

Psoas Minor

Answer 19

Anterior rami of lumbar (L1, L2)

Question 20

Rectus Femoris
Vastus Lateralis
Vastus Medialis
Vastus Intermedius

Answer 20

Femoral nerve (L2-L4)

Question 21

Adductor Longus
Adductor Brevis
Adductor Magnus (adductor part)

Answer 21

Obturator nerve (L2-L4)

Question 22

Adductor Magnus (hamstring part)

Answer 22

Tibial nerve (L4)

Question 23

Gracilis

Answer 23

Obturator nerve (L2, L3)

Question 24

Semitendinosus
Semimembranosus
Biceps Femoris (long head)

Answer 24

Tibial nerve (L5, S1, S2)

Question 25

Biceps Femoris (short head)

Answer 25

Common fibular nerve (L5, S1, S2)

Question 26

Tibialis Anterior

Answer 26

Deep fibular nerve (L4, L5)

Question 27

Extensor Digitorum Longus Extensor Hallucis Longus Fibularis Tertius

Answer 27

Deep fibular nerve (L5, S1)

Question 28

Fibularis Longus Fibularis Brevis

Answer 28

Superficial fibular nerve (L5, S1, S2)

Question 29

Gastrocnemius Soleus Plantaris

Answer 29

Tibial nerve (S1, S2)

Question 30

Tibialis Posterior

Answer 30

Tibial nerve (L4, L5)

Question 31

Flexor Digitorum Longus Flexor Hallucis Longus

Answer 31

Tibial nerve (S2, S3)