Upper Limb Muscle Actions

Question 1

Pectoralis major action

Answer 1

Adducts and medially rotates humorous

Question 2

Pectoralis minor

Answer 2

Stabilized scapula

Question 3

Subclavious

Answer 3

Anchors and depresses clavical

Question 4

Serrated anterior

Answer 4

Protracts scapula holds it against thoracic wall + rotates scapula

Question 5

Trapezius

Answer 5

Descending- elevates
Ascending- depressed
All+middle retract scapula

Question 6

Latissimus Dorsi

Answer 6

Extends, adducts, medially rotates

Question 7

Levator scapulae

Answer 7

Elevates scapula

Question 8

Rhomboid minor and major

Answer 8

Retract scapula

Question 9

Deltoid

Answer 9

Clavicular: flex arm, medially rotate
Acromial: abduct (15-90 deg)
Spinal: Extend, laterally rotate arm

Question 10

Teres major

Answer 10

Adduct and medically rotate arm

Question 11

Teres minor

Answer 11

Laterally rotate arm

Question 12

supraspinatus

Answer 12

Initiate abduction first 15 degrees

Question 13

Infaspinatus

Answer 13

Laterally rotate arm

Question 14

Subscapularis

Answer 14

Medically rotate arm

Question 15

Biceps brachii

Answer 15

Flexes arm, supinates

Question 16

Coracobrachialis

Answer 16

Flex, adduct

Question 17

Brachial is

Answer 17

Main arm flexor

Question 18

Triceps brachii

Answer 18

Extensors

Question 19

Flexor digitorum superficialis

Answer 19

Flexes phalanges at proximal interphalangeal joints of middle four digits

Question 20

Pronator Teres

Answer 20

Pronates forearm

Question 21

Palmaris longus

Answer 21

Flexes hand at wrist and tenses palmar aponeurosis

Question 22

Flexor carpi ulnaris

Answer 22

Flexes and adduced hand at wrist

Question 23

Flexor carpi radialis

Answer 23

Flexes and abducts hand at wrist

Question 24

Flexor digitorum profundus

Answer 24

Flexes distal phalanges at distal interphalangeal joints

Question 25

Flexor pollicus longus

Answer 25

Flexes thumb

Question 26

Pronator quadratis

Answer 26

Pronates forearm

Question 27

Brachioradialis

Answer 27

Week flexor of forearm

Question 28

Extensor carpi radialis longus/ brevis

Answer 28

Extend and abduct hand at wrist joint

Question 29

Extensor digitorum

Answer 29

Extends medial four digits primarily at metacarpophalangeal joint

Question 30

Extensor digiti minimi

Answer 30

Extends pinky at metacarpophalangeal joint

Question 31

Extensor carpi ulnaris

Answer 31

Extends and adducts wrist

Question 32

Supinator

Answer 32

Supinates forearm

Question 33

Extensor indicis

Answer 33

Extends second digit helps extend hand at wrist

Question 34

Abductor pollicus

Answer 34

Abducts thumb and extends at carpometacarpal joint

Question 35

Extensor pollicus longus/brevis

Answer 35

Extends distal and proximal phalanx of thumb