Page 4 (Forearm & Hand)

Question 0

Extensor carpi ulnaris - insertion

Answer 0

Base of 5th metacarpal

Question 1

Extensor carpi ulnaris - origins (2)

Answer 1

Lateral epicondyle of humerus

Middle 1/2 of ulna

Question 2

Extensor carpi ulnaris - actions (2)

Answer 2

Extends the wrist

Adducts the hand (ulnar deviation)

Question 3

Extensor carpi ulnaris - innervation

Answer 3

Deep radial nerve (C7, C8)

Question 4

Anconeus - origin

Answer 4

Lateral epicondyle of humerus

Question 5

Anconeus - insertions (2)

Answer 5

Lateral side of olecranon

Proximal 1/4 of ulna

Question 6

Anconeus - action

Answer 6

Extends forearm

Question 7

Anconeus - innervation

Answer 7

Radial nerve (C7, C8, T1)

Question 8

Supinator - origins (4)

Answer 8

Lateral epicondyle of humerus
Supinator crest and fossa of ulna
Radial collateral ligament
Annular ligament

Question 9

Supinator - action

Answer 9

Supinates forearm

Question 10

Supinator - insertion

Answer 10

Proximal 1/3 of Radius

Question 11

Supinator - innervation

Answer 11

Deep radial nerve (C7, C8)

Question 12

Abductor pollicis longus - origins (3)

Answer 12

Middle 1/3 of radius
Interosseous membrane
Mid-portion of ulna

Question 13

Abductor pollicis longus - insertion

Answer 13

Base of first metacarpal

Question 14

Abductor pollicis longus - action

Answer 14

Abducts thumb at carpometacarpal joint

Question 15

Abductor pollicis longus - innervation

Answer 15

PIN (radial nerve) - (C7, C8)

Question 16

Extensor pollicis brevis - origins (2)

Answer 16

Interosseous membrane

Distal radius

Question 17

Extensor pollicis brevis - insertion

Answer 17

Base of proximal phalanx of thumb

Question 18

Extensor pollicis brevis - action

Answer 18

Extends thumb at metacarpophalangael joint

Question 19

Extensor pollicis brevis - innervation

Answer 19

PIN (radial nerve) - (C7, C8)

Question 20

Extensor pollicis longus - origins (2)

Answer 20

Interosseous membrane

Middle part of ulna

Question 21

Extensor pollicis longus - insertion

Answer 21

Base of distal phalanx of thumb

Question 22

Extensor pollicis longus - action

Answer 22

Extends thumb at the interphalangeal joint

Question 23

Extensor pollicis longus - innervation

Answer 23

PIN (radial nerve) - (C7, C8)

Question 24

Extensor indicis - origins (2)

Answer 24

Interosseous membrane

Posterolateral surface of distal ulna

Question 25

Extensor indicis - insertion

Answer 25

Extensor expansion of 2nd digit

Question 26

Extensor indicis - action

Answer 26

Extends MCP, PIP, and DIP joints of index finger

Question 27

Extensor indicis - innervation

Answer 27

PIN (radial nerve) - (C7, C8)

Question 28

Lumbrical (hand) - origin

Answer 28

Flexor digitorum profundus (FDP) tendons of digits 2-5

Question 29

Lumbrical (hand) - insertion

Answer 29

Extensor expansions of digits 2-5

Question 30

Lumbrical (hand) - actions

Answer 30

Flex the MCP joints of digits 2-5

Question 31

Lumbrical (hand) - innervations (2)

Answer 31

Lateral two - median nerve

Medial two - ulnar nerve

Question 32

Lumbrical (hand) - innervations

Answer 32

Lateral two - median nerve

Medial two - ulnar nerve

Question 33

Interosserous palmar - Action and Innervation

No origin or insertion

Answer 33

Action: Adducts digits 1, 2, 4, and 5
Innervation: Ulnar nerve

Question 34

Opponens pollicis - Action and Innervation

No origin or insertion

Answer 34

Action: Opposes the thumb
Innervation: Median nerve