Forearm mm - Innervations

Question 1

Median nerve innervates…

Answer 1

All flexor forearm mm,

EXCEPT— FCU & medial two tendons of FDP (digits 4&5)

Question 2

Deep anterior forearm flexors (except for the medial 2 tendons of FDP) are innervated by…

Answer 2

anterior interosseus nerve (median n)

Question 3

All mm of posterior forearm compartment are innervated by…

Answer 3

radial nerve (or branches of it)

Question 4

The outcropping (extensor) mm are all innervated by…

Answer 4

posterior interosseous branch (radial n)

note: outcropping mm = ABD PL, EPB, EPL

Question 5

Flexor Carpi Radialis

Answer 5

median n (C6 - C7)

Question 6

Pronator Teres

Answer 6

median n (C6 - C7)

Question 7

Palmaris Longus

Answer 7

median n (C7 - C8)

Question 8

Flexor Carpi Ulnaris

Answer 8

ulnar n (C8, T1)

Question 9

Flexor Digitorum Superficialis

***two heads, same inn

Answer 9

median n (C7 - T1)

Question 10

Flexor Digitorum Profundus

***dual innervation

Answer 10

medial 2 tendons - ulnar n (C8 - T1)

Lateral 2 tendons - anterior interosseous n from median n (C8 - T1)

Question 11

Flexor Pollicis Longus

Answer 11

anterior interosseous n (from median n) (C8 - T1)

Question 12

Pronator Quadratus

Answer 12

anterior interosseous n (from median n) (C8 - T1)

Question 13

Brachioradialis

Answer 13

radial n (C5 - C7)

Question 14

Extensor Carpi Radialis Longus

Answer 14

radial n (C6 - C7)

Question 15

Extensor Carpi Radialis Brevis

Answer 15

deep branch of the radial n (C7 - C8)

Question 16

Extensor Digitorum

Answer 16

posterior interosseous branch of the radial nerve (C7 - C8)

Question 17

Extensor Digiti Minimi

Answer 17

posterior interosseous branch of the radial n (C7 - C8)

Question 18

Extensor Carpi Ulnaris

Answer 18

posterior interosseous branch of the radial n (C7 - C8)

Question 19

Anconeus

Answer 19

radial n (C6 - C8)

Question 20

Supinator

Answer 20

deep branch (radial n pierces mm) (C7, C8)

Question 21

Extensor Indicis

Answer 21

posterior interosseous branch of radial n (C7 - C8)

Question 22

Abductor Pollicis Longus

Answer 22

posterior interosseous branch of radial n (C7 - C8)

Question 23

Extensor Pollicis Brevis

Answer 23

posterior interosseous branch of radial n (C7 - C8)

Question 24

Extensor Pollicis Longus

Answer 24

posterior interosseous branch of radial n (C7 - C8)