Innervations for PM&R Boards

Question 1

trapezius, SCM

Answer 1

C3, C4; spinal accessory nerve

Question 2

rhomboids

Answer 2

C4, C5; dorsal scapular nerve (pre-plexus)

Question 3

supraspinatus, infraspinatus

Answer 3

C5, C6; upper trunk; suprascapular nerve

Question 4

biceps brachii, brachialis

Answer 4

C5, C6; upper trunk; lateral cord; musculocutaneous nerve

Question 5

deltoid, teres minor

Answer 5

C5, C6; upper trunk; posterior cord; axillary nerve

Question 6

BR

Answer 6

C5, C6; upper trunk; posterior cord; radial nerve

Question 7

serratus anterior

Answer 7

C5, C6, C7; long thoracic nerve

Question 8

Pec major

Answer 8

C5, C6, C7, C8, T1; upper, middle, lower trunk; medial and lateral cord; medial and lateral pectoral nerves

Question 9

PT, FCR

Answer 9

C6, C7; upper and middle trunk; lateral cord; median nerve

Question 10

ECRL

Answer 10

C6, C7; upper and middle trunk; posterior cord; radial nerve

Question 11

triceps, anconeus

Answer 11

C6, C7, C8; upper, middle, lower trunk; posterior cord; radial nerve

Question 12

latissimus dorsi

Answer 12

C6, C7, C8; upper, middle, lower trunk, posterior cord; thoracodorsal nerve

Question 13

ECU, EIP, ED

Answer 13

C7, C8; middle and lower trunk; posterior cord; radial nerve; PIN

Question 14

FDS

Answer 14

C7, C8; middle and lower trunk; medial and lateral cord; median nerve

Question 15

PQ, FPL

Answer 15

C7, C8, T1; middle and lower trunk; medial and lateral cord; median nerve; AIN

Question 16

FDP 2,3

Answer 16

C7, C8, T1; middle and lower trunk; medial cord; median nerve; AIN

Question 17

FDP 4, 5

Answer 17

C7, C8, T1; middle and lower trunk; medial cord; ulnar nerve

Question 18

APB, FPB, lumbricals 1,2, opponens pollicis

Answer 18

C8, T1; lower trunk; medial cord; median nerve

Question 19

FCU, ADM, FDI, lumbricals 3,4, interossei (3 PADs and 4 DABs)

Answer 19

C8, T1; lower trunk; medial cord; ulnar nerve

Question 20

skin over lateral forearm

Answer 20

C5, C6; upper trunk; lateral cord; musculocutaneous nerve; terminates as lateral antebrachial cutaneous nerve (LAC)

Question 21

skin over medial forearm

Answer 21

C8, T1; lower trunk; medial cord; medial antebrachial cutaneous nerve (MAC)

Question 22

quads, iliopsoas

Answer 22

L2, L3, L4; femoral nerve

Question 23

adductors, gracilis

Answer 23

L2, L3, L4; obturator nerve

Question 24

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

Answer 24

L4, L5; sciatic nerve; deep fibular nerve

Question 25

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

Answer 25

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

Question 26

semimembranosus, semitendinosus, long head of biceps femoris

Answer 26

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

Question 27

short head of biceps femoris

Answer 27

L5, S1; sciatic nerve (fibular division)

Question 28

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

Answer 28

L4, L5, S1; superior gluteal nerve

Question 29

fibularis longus, fibularis brevis

Answer 29

L5, S1; sciatic nerve; superficial fibular nerve

Question 30

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

Answer 30

L5, S1; sciatic nerve; tibial nerve

Question 31

gluteus maximus

Answer 31

L5, S1, S2; inferior gluteal nerve

Question 32

gastrocnemius, soleus

Answer 32

S1, S2; sciatic nerve; tibial nerve

Question 33

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

Answer 33

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

Question 34

abductor digiti quinti pedis (ADQP)

Answer 34

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

Question 35

lateral thigh

Answer 35

L2, L3; lateral femoral cutaneous nerve

Question 36

medial shin, medial calf

Answer 36

L2, L3, L4; femoral nerve; saphenous nerve

Question 37

medial plantar surface of foot

Answer 37

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

Question 38

lateral plantar surface of foot

Answer 38

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