Muscle Function - Upper Limb

Question 1

What is the function of the trapezius?

Answer 1

Rotates scapula to elevate arm; also elevates , depresses and retracts scapula; extends and rotates head

Question 2

What is the function of the levator scapulae?

Answer 2

Elevates scapula

Question 3

What is the function of the rhomboids?

Answer 3

Elevates and retracts scapula

Question 4

What is the function of the deltoid?

Answer 4

Powerful abduction of the arm beyond 15 degrees

Question 5

What is the function of the Latissimus dorsi?

Answer 5

Powerful addiction, medial rotation and extension of arm

Question 6

What is the function of the pectoralis major?

Answer 6

Powerful adduction, flexion, extension and medial rotation of the arm

Question 7

What is the function of the pectoralis minor?

Answer 7

Rotates and protracted scapula

Question 8

What is the function of the subclavius?

Answer 8

Depresses clavicle and stabilises joint

Question 9

What is the function of the coracobrchialis?

Answer 9

Flexes arm at the shoulder joint

Question 10

What is the function of the serratus anterior?

Answer 10

Protracted and rotates scapula, prevents “winging”

Question 11

What is the function of the supraspinatus?

Answer 11

Initiates abduction of arm (first 15 degrees)

Question 12

What is the function of the infraspinatus?

Answer 12

Lateral rotation of arm

Question 13

What is the function of the teres minor?

Answer 13

Lateral rotation of arm

Question 14

What is the function of the teres major?

Answer 14

Medically rotates and extends arm

Question 15

What is the function of the subscapularis?

Answer 15

Medial rotation of arm

Question 16

What is the function of the biceps brachii?

Answer 16

Flexor of forearm (strong) and arm (weak) and powerful supination

Question 17

What is the function of the brachialis?

Answer 17

Powerful flexor of the forearm

Question 18

What is the function of the triceps brachii?

Answer 18

Extension of arm and forearm

Question 19

What is the function of the flexor carpi ulnaris?

Answer 19

Flexion and adduction of the wrist

Question 20

What is the function of the palmaris longus?

Answer 20

Tightening of palm skin (and a little bit of wrist flexion)

Question 21

What is the function of the flexor carpi radialis?

Answer 21

Flexion and abduction of the wrist

Question 22

What is the function of the pronator teres?

Answer 22

Pronation of forearm

Question 23

What is the function of the flexor digitorum superficialis?

Answer 23

Flexes wrist, metacarpophalangeal joints, first interphalangeal joints

Question 24

What is the function of the flexor digitorum profundus?

Answer 24

Flexes wrist, metacarpophalangeal joints, proximal and distal interphalangeal joints

Question 25

What is the function of the flexor pollicis longus?

Answer 25

Flexes metacarpophalangeal and interphalangeal joint of digit 1

Question 26

What is the function of the pronator quadratus

Answer 26

Pronation of the forearm

Question 27

What is the function of the brachioradialis?

Answer 27

Flexes elbow when arm is partially pronated

Question 28

What is the function of the extensor carpi radialis longus and brevis?

Answer 28

Extends and abducts the wrist

Question 29

What is the function of the extensor digitorum?

Answer 29

Extends digits 2-5 and the wrist

Question 30

What is the function of the extensor digiti minimi?

Answer 30

Accessory extensor of digit 5

Question 31

What is the function of the extensor carpi ulnaris?

Answer 31

Extends and adducts the wrist

Question 32

What is the function of the anconeus?

Answer 32

Abducts ulna during pronation to maintain position of the hand

Question 33

What is the function of the supinator?

Answer 33

Supinates forearm

Question 34

What is the function of the abductor pollicis longus?

Answer 34

Abducts thumb

Question 35

What is the function of the extensor pollicis brevis and longus?

Answer 35

Extends the thumb

Question 36

What is the function of the extensor indicus?

Answer 36

Extends digit 2

Question 37

What is the function of the palmaris brevis?

Answer 37

Deepens cup of hand

Question 38

What is the function of the adductor pollicis?

Answer 38

Adducts the thumb

Question 39

What is the function of the lumbricals?

Answer 39

Flexion of MCP joint and extension of IP joints

Question 40

What is the function of the interossei?

Answer 40

Abduct (dorsal) and adduct (palmar) fingers, flexes MCP and extends IP joints