Muscles functions

Question 1

Pectoralis Major

Answer 1

Adducts and meidially roates the upper limb

Question 2

Pectoralis Minor

Answer 2

Stabilises the scapula by drawing it anteroinferiorlu against the thoracic wall

Question 3

Serratus anterior

Answer 3

Rotates the scapula

Question 4

Subclavius

Answer 4

anchors and depresses the clavicle

Question 5

Trapezius

Answer 5

Upper fibres elevate the scapula and rotate during abduction of the arm
Middle fibres - retract the scapula
Lower scapula - pulls the scapula inferiorly

Question 6

Lattisimus dorsi

Answer 6

Extends, adducts and medially rotates the upper limb

Question 7

levatator scapulae

Answer 7

elevates the scapula

Question 8

Rhomboids

Answer 8

Reatracts and rotates the scapula

Question 9

Deltoid

Answer 9

Anterior fibres- flexion and medial rotation
Posterior fibres- extension and lateral rotation
Middle fibres- the maor abductor of the arm

Question 10

Teres major

Answer 10

Adducts the shoulder and medially rotates the arm

Question 11

Supraspinatus

Answer 11

Abducts the arm 0-15 and assists deltoid for 15-90 degrees

Question 12

Infraspinatus

Answer 12

Laterally rotates the arm

Question 13

Subscapularis

Answer 13

Medially rotates the arm

Question 14

Teres minor

Answer 14

Laterally rotates the arm

Question 15

Biceps Brachii

Answer 15

Supination of the forearm

Flexes the arm at the elbow and the shoulder

Question 16

Coracobrachialis

Answer 16

Flexion of the arm at the shoulder, and weak adduction

Question 17

Brachialis

Answer 17

Flexion at the elbow

Question 18

Triceps brachii

Answer 18

extension of the arm at the elbow

Question 19

FCU

Answer 19

Flexion and adduction at the wrist

Question 20

Palmaris Longus

Answer 20

Flexion at the wrist

Question 21

Flexor carpi radialis

Answer 21

Flexion and abduction at the wrist

Question 22

Pronator teres

Answer 22

Pronation of the forearm

Question 23

Flexor digitrorum superficialis

Answer 23

Flexes the metacarpophalangeal joints and proximal interphalangeal joints at the 4 fingers, and flexes the wrist

Question 24

Flexor Digitorum Profundus

Answer 24

Only muscle that can flex the distal interphalangeal joints of the fingers.
Flexes at metacarpophalangeal joints and at the wrist

Question 25

Flexor Pollicis longus

Answer 25

Flexes interphalangeal joint and metacarpophalangeal joint of the thumb

Question 26

Pronator Quadratus

Answer 26

Pronates the forearm

Question 27

Brachioradialis

Answer 27

Flexes at the elbow

Question 28

Extensor Carpi radialis Brevis

Answer 28

Extends and abducts the wrist

Question 29

Extensor Carpi radialis longus

Answer 29

extends and abducts the wrist

Question 30

Extensor Digitorum

Answer 30

Extends medial four fingers at the MCP and IP joints

Question 31

Extensor digiti minimi

Answer 31

Extends the little finger, and contributes to extension of the wrist

Question 32

Extensor Carpi ulnaris

Answer 32

Extension and adduction of the wrist

Question 33

Aconeus

Answer 33

Extends and stabilises the elbow joint. | Abducts the ulna during pronation of the forearm

Question 34

Supinator

Answer 34

supinates the forearm

Question 35

Abductor pollicis longus

Answer 35

Abducts the thumb

Question 36

Extensor Pollicis brevis

Answer 36

Extends at the metacarpophalangeal and carpometacarpal

Question 37

extensor pollicis longus

Answer 37

extends all joints of the thumb

Question 38

Extensor Indicis propius

Answer 38

Extends the index finger

Question 39

opponens pollicis

Answer 39

opposes the thumb, by medially rotating and flexing the metacarpal on the trapezium

Question 40

Abductor Pollicis brevis

Answer 40

Abducts the thumb

Question 41

Flexor pollicis brevis

Answer 41

Flexes the MCP joint of the thumb

Question 42

opponnes digiti minimi

Answer 42

Rotates the metacarpal of the little finger towards the palm producing opposition

Question 43

abductor digiti minimi

Answer 43

abducts the little finger

Question 44

Flexor digiti minimi brevis

Answer 44

Flexes the MCP joint of the little finger

Question 45

Lumbricals

Answer 45

Flex at the MCP joint, and extend at the interphalangeal joints of each finger

Question 46

Dorsal interossei

Answer 46

Abduct the fingers at the MCP joint

Question 47

Palmar interossei

Answer 47

Adducts the finger at the MCP joint

Question 48

palmaris brevis

Answer 48

Wrinkles the skin of the hypothenar eminence and deepens the curvature of the hand, improving grip

Question 49

Adductor pollicis

Answer 49

Adductor of the thumb