Muscle Innervations

Question 1

Iliopsoas

Answer 1

(L1-L2)-L3

Femoral nerve

Question 2

Rectus Femoris

Answer 2

L2-(L3-L4)

Femoral nerve

Question 3

Vastus Lateralis

Answer 3

L2-(L3-L4)

Femoral nerve

Question 4

Vastus medialis

Answer 4

L2-(L3-L4)

Femoral nerve

Question 5

Adductor Magnus

Answer 5

(L2-L3)-L4

Obturator nerve

Question 6

Gracilis

Answer 6

(L2-L3)-L4

Obturator nerve

Question 7

Biceps Femoris Long Head

Answer 7

L5-(S1)-S2

Sciatic Nerve

Question 8

Peroneus Longus

Answer 8

(L5-S1)-S2

Common peroneal nerve

Question 9

Tibialis Anterior

Answer 9

(L4-L5)-S1

Common Peroneal Nerve

Question 10

Extensor Digitorum Brevis

Answer 10

L5-S1

Common Peroneal Nerve

Question 11

Gastrocnemius

Answer 11

S1-(S2)

Tibial Nerve

Question 12

Abductor Hallucis

Answer 12

S1-S2-S3

Tibial Nerve

Question 13

Flexor Digitorum Brevis

Answer 13

S1-S2-S3

Tibial Nerve

Question 14

External Anal Sphincter

Answer 14

S2-S4

Question 15

Deltoid

Answer 15

(C5)-C6

Axillary nerve

Question 16

Biceps brachii

Answer 16

C5-(C6)

Musculocutaneus nerve

Question 17

Triceps

Answer 17

C6-(C7)-C8

Radial nerve

Question 18

Flexor Carpi Radialis

Answer 18

C6-C7

Median nerve

Question 19

Extensor Carpi Radialis (ECR)

Answer 19

C5-C8

Question 20

Abductor Pollicis Brevis (APB)

Answer 20

C8-T1

Median nerve

Question 21

Abductor Digiti Minimi (ADM)

Answer 21

C8-T1

Ulnar nerve

Question 22

Trapezius

Answer 22

C3-C4

Also innervated by CN XI (Accessory Nerve)

Question 23

Sartorius

Answer 23

L2-L4

Femoral nerve

Question 24

Extensor Hallucis Longus

Answer 24

L5-S1
Common peroneal nerve

aka “The big toe extensor” pulls the toe toward the shin

Question 25

Semitendinosus

Answer 25

L5-S1-S2

Sciatic nerve