UE Muscle Action

Question 0

Trapezius (middle fibers)

Answer 0

Elevate scapula

Upward rotate scapula

Question 1

Trapezius (upper fibers)

Answer 1

Extend head

Extend cervical vertebral column

Question 2

Trapezius (lower fibers)

Answer 2

Depress scapula

Downward rotate scapula

Question 3

Latissimus dorsi

Answer 3

Extend arm
Medially rotate arm
Depress scapula
Retract scapula
Downward rotate scapula

Question 4

Rhomboideus major

Answer 4

Retract scapula
Downward rotate scapula
Elevate scapula

Question 5

Rhomboideus minor

Answer 5

Retract scapula
Downward rotate scapula
Elevate scapula

Question 6

Levator scapulae

Answer 6

Elevate scapula

Downward rotate scapula

Question 7

Serratus anterior

Answer 7

Protract scapula
Assists in breathing
Prevents scapular winging

Question 8

Teres major

Answer 8

Adduct arm
Extend arm
Medially rotate arm

Question 9

Deltoid (clavicular head)

Answer 9

Abduct arm
Flex arm
Medially rotate arm

Question 10

Deltoid (spinal head)

Answer 10

Abduct arm
Extend arm
Laterally rotate arm

Question 11

Supraspinatus

Answer 11

Abduct arm

Support glenohumeral joint

Question 12

Infraspinatus

Answer 12

Laterally rotate arm

Support glenohumeral joint

Question 13

Teres minor

Answer 13

Laterally rotate arm
Adduct arm (weak)
Support glenohumeral joint

Question 14

Subscapularis

Answer 14

Medially rotate arm

Support glenohumeral joint

Question 15

Pectoralis major (clavicular head)

Answer 15

Adduct arm
Medially rotate arm
Help flex an extended arm

Question 16

Pectoralis major (sternocostal head)

Answer 16

Adduct arm
Medially rotate rm
Help extend a flexed arm

Question 17

Coracobrachialis

Answer 17

Flex arm

Assist in adduction

Question 18

Biceps brachii

Answer 18

Flex arm
Flex forearm
Supinate forearm

Question 19

Brachialis

Answer 19

Flex forearm

Question 20

Triceps brachii long head

Answer 20

Extend forearm

Extend arm

Question 21

Triceps brachii medial head

Answer 21

Extend forearm

Question 22

Triceps brachii lateral head

Answer 22

Extend forearm

Question 23

Pronator teres

Answer 23

Pronate forearm

Flex elbow

Question 24

Flexor carpi radialis

Answer 24

``` Flex wrist Abduct hand (radial deviation) Flex elbow (weak) ```

Question 25

Palmaris longus

Answer 25

``` Flex wrist Flex elbow (weak) ```

Question 26

Flexor digitorum superficialis

Answer 26

``` Flex proximal interphalangeal joints Flex metacarpophalangeal joints Flex wrist Flex elbow (weak) ```

Question 27

Pronator quadratus

Answer 27

Pronate forearm

Question 28

Flexor pollicis longus

Answer 28

Flex interphalangeal joint of pollux Flex metacarpophalangeal joint of pollux Flex wrist

Question 29

Flexor digitorum profundus

Answer 29

Flex distal interphalangeal joints Flex proximal interphalangeal joints Flex metacarpophalangeal joints Flex wrist

Question 30

Flexor carpi ulnaris

Answer 30

``` Flex wrist Adduct hand (ulnar deviation) Flex elbow (weak) ```

Question 31

Aconeus

Answer 31

Assist in elbow extension

Question 32

Brachioradialis

Answer 32

Elbow flexion

Question 33

Extensor carpi radialis longus

Answer 33

``` Extend wrist Abduct wrist (radial deviation) ```

Question 34

Extensor carpi radialis brevis

Answer 34

``` Extend wrist Abduct wrist (radial deviation) ```

Question 35

Extensor digitorum

Answer 35

Extend fingers | Extend wrist

Question 36

Extensor digit minimi

Answer 36

Extend digit 5 | Extend wrist

Question 37

Extensor carpi ulnaris

Answer 37

``` Extend wrist Adduct wrist (ulnar deviation) ```

Question 38

Supinator

Answer 38

Supinate forearm

Question 39

Extensor indicis

Answer 39

Extend digit 2 | Extend wrist

Question 40

Abductor pollicis longus

Answer 40

Abduct thumb

Question 41

Extensor pollicis brevis

Answer 41

Extend thumb at metacarpophalangeal joint

Question 42

Extensor pollicis longus

Answer 42

Extend thumb at metacarpophalangeal joint and interphalangeal joint

Question 43

Abductor pollicis brevis

Answer 43

Abduct thumb | Assist in flexion of thumb

Question 44

Flexor pollicis brevis

Answer 44

Flex thumb

Question 45

Opponens pollicis

Answer 45

Opposition

Question 46

Abductor digiti minimi

Answer 46

Abduct 5th digit

Question 47

Flexor digiti minimi

Answer 47

Flex 5th digit metacarpophalangeal joint

Question 48

Opponens digiti minimi

Answer 48

Opposition of 5th digit

Question 49

Palmaris brevis

Answer 49

Wrinkles skin on ulnar side of palm | "Cupping" of hand

Question 50

Lumbercals

Answer 50

Flex metacarpophalangeal joints | Extend proximal and distal interphalangeal joints

Question 51

Dorsal interossei

Answer 51

Abduct digits 2, 3, 4 | Assists in flexing digits 2,3,4

Question 52

Palmar interossei

Answer 52

Adduct digits 2,4,5 | Assist in flexing metacarpophalangeal joints of digits 2,4,5

Question 53

Adductor pollicis

Answer 53

Addict thumb | Assist in opposition