Action of Upper Limb Muscles

Question 1

Coracobrachialis Muscle

Answer 1

adducts and flexes humerus at the shoulder

Question 2

Biceps Brachii

Answer 2

Supinates and flexes forearm, flexes arm

Question 3

Brachialis

Answer 3

Flexes forearm at the elbow

Question 4

Triceps Brachii

Answer 4

Extends forearm and arm at elbow, long head stabilizes head of humerus and extends and adducts arm at shoulder

Question 5

Aconeus

Answer 5

Extends forearm

Question 6

Pronator Teres

Answer 6

pronates forearm

Question 7

Flexor Carpi Radialis

Answer 7

Flexes and abducts hand at wrist (radial deviation)

Question 8

Palmaris Longus

Answer 8

Flexes hand at wrist and tenses palmar aponeurosis

Question 9

Flexor Carpi Ulnaris

Answer 9

Flexes and adducts hand at wrist

Question 10

Flexor digitorum superficialis

Answer 10

Flexes middle phalanx at proximal interphalangeal(PIP) joint of digits 2-5

Question 11

Flexor digitorum profundus

Answer 11

Flexes distal phalanx at distal interphalangeal (DIP) joints of digits 2-5

Question 12

Flexor pollicis (thumb) longus

Answer 12

Flexes digit 1

Question 13

Pronator quadratus

Answer 13

pronates forearm

Question 14

Brachioradialis

Answer 14

flexes forearm

Question 15

Extensor carpi radialis longus

Answer 15

extend and abduct hand at wrist

Question 16

Extensor carpi radialis brevis

Answer 16

Extend and abduct hand at wrist

Question 17

Extensor digitorum

Answer 17

Extends digits 2-5 at metacarpophalangeal joint

Question 18

Extensor digit minimi

Answer 18

Extends digit 5 at metacarpophalangeal joint

Question 19

Extensor Carpi Ulnaris

Answer 19

Extends and adducts hand at wrist

Question 20

Supinator

Answer 20

supinates forearm

Question 21

Abductor pollicis longus

Answer 21

abducts thumb

Question 22

Extensor pollicis brevis

Answer 22

extends proximal phalanx of thumb at metacarpophalangeal joint

Question 23

Extensor pollicis longus

Answer 23

extends distal phalanx of thumb

Question 24

Extensor indicis

Answer 24

extends digit 2

Question 25

Abductor Pollicis Brevis

Answer 25

Abducts Thumb

Question 26

Flexor Pollicis Brevis

Answer 26

Flexes thumb

Question 27

Opponens Pollicis

Answer 27

Opposes thumb

Question 28

Lumbricals

Answer 28

Flex MCP joints, extend IP joints of digits 2-5

Question 29

Abductor Digiti Minimi

Answer 29

Abducts digit 5

Question 30

Flexor Digiti Minimi Brevis

Answer 30

Flexes Proximal Phalanx of Digit 5

Question 31

Opponens Digiti Minimi

Answer 31

Opposes 5th digit to thumb

Question 32

Adductor Pollicis Muscle

Answer 32

Adducts thumb

Question 33

Dorsal Interosseous Muscles (4)

Answer 33

Abducts digits 2-4

Question 34

Palmar Interossei Muscles (3)

Answer 34

Adducts digits 2,4,5