Actions of Muscles

Question 1

Deltoid

Answer 1

Anterior: Flexes shoulder, medially rotates shoulder
Lateral: Abducts shoulder
Posterior: Extends shoulder, laterally rotates shoulder

Question 2

Pectoralis Major

Answer 2

Clavicular: Flexes shoulder
Sternocostal: Extends shoulder (when flexed)
Both: Adducts shoulder, medially rotates shoulder

Question 3

Trapezius

Answer 3

A:
Superior: Elevates scapula, upward rotates scapula
Middle: Retracts scapula
Inferior: Depresses scapula, upward rotates scapula

Question 3

Pectoralis Minor

Answer 3

Protracts scapula
Downward rotates scapula
Elevates ribs (forced inspiration)

Question 4

Serratus anterior

Answer 4

Protracts scapula
Upward rotates scapula
Elevates ribs (forced inspiration)

Question 5

Levator scapulae

Answer 5

Elevates scapula
Downward rotates scapula

Question 6

Rhomboid minor
Rhomboid major

Answer 6

Elevates scapula
Retracts scapula
Downward rotates scapula

Question 7

Latissimus dorsi

Answer 7

Extends shoulder
Adducts shoulder
Medially rotates shoulder

Question 8

Teres Major

Answer 8

Extends shoulder
Adducts shoulder
Medially rotates shoulder

Question 9

Supraspinatus

Answer 9

Abducts shoulder

Question 10

Infraspinatus

Answer 10

Laterally rotates shoulder

Question 11

Teres minor

Answer 11

Laterally rotates shoulder

Question 12

Subscapularis

Answer 12

Medially rotates shoulder

Question 13

Bicep Brachii

Answer 13

Flexes shoulder
Flexes elbow
Supinates forearm

Question 14

Coracobrachialis

Answer 14

Flexes shoulder
Adducts shoulder

Question 15

Brachialis

Answer 15

Flexes elbow

Question 16

Triceps brachii

Answer 16

Long head: Extends shoulder
All: Extends elbow

Question 17

Anconeus

Answer 17

Extends elbow

Question 18

Brachioradialis

Answer 18

Flexes elbow
Pronates forearm (when supinated)
Supinates forearm (when pronated)

Question 19

Flexions of wrist only

Answer 19

Flex carpi radialis
Palmaris longus
Flex carpi ulnaris

Question 20

flexion of wrist and digits

Answer 20

Flex digit superfic
Flex digit profund
Flex poll longus

Question 21

Extension of writst only

Answer 21

Ext carpi radialis long
Ext carpi radialis brev
Ext carpi ulnaris

Question 22

Extension Wrist and/or Digits

Answer 22

Ext digit
Ext indicis
Ext digit minimi
Ext poll long (digit)
Ext poll brev (digit)
Abd poll long (digit)

Question 23

Wrist Abduction

Answer 23

Radius
flexor carpi radialis
extensor carpi radialis longus

Question 24

Wrist Adduction

Answer 24

ulna Flexor carpi ulnaris extensor carpi ulnaris

Question 25

Pronator teres

Answer 25

Pronates forearm

Question 26

Pronator quadratus

Answer 26

A: Pronates forearm

Question 27

Flexor carpi radialis

Answer 27

Flexes wrist Abducts wrist

Question 28

Flexor carpi ulnaris

Answer 28

Flexes wrist Adducts wrist

Question 29

Palmaris longus

Answer 29

Flexes wrist

Question 30

Flexor digitorum superficialis

Answer 30

Flexes wrist Flexes MCP and PIP joints of digits II-V

Question 31

Flexor digitorum profundus

Answer 31

Flexes wrist Flexes MCP, PIP, and DIP joints of digits II-V

Question 32

Flexor pollicis longus

Answer 32

Flexes wrist Flexes MCP and IP joints of digit I

Question 33

Supinator

Answer 33

Supinates forearm

Question 34

Brachioradialis

Answer 34

Flexes elbow Pronates forearm (when supinated) Supinates forearm (when pronated)

Question 35

Extensor carpi radialis longus

Answer 35

Extends wrist Abducts wrist

Question 36

Extensor carpi radialis brevis

Answer 36

Extends wrist Abducts wrist

Question 37

Extensor carpi ulnaris

Answer 37

Extends wrist Adducts wrist

Question 38

Extensor digitorum

Answer 38

Extends wrist Extends MCP, PIP, and DIP joints of digits II-V

Question 39

Extensor digiti minimi

Answer 39

Extends wrist Extends MCP joint of digit V

Question 40

Extensor indicis

Answer 40

Extends wrist Extends MCP, PIP, and DIP joints of digit II

Question 41

Abductor pollicis longus

Answer 41

Abducts wrist Extends digit I (CMC joint) Abducts digit I (CMC joint)

Question 42

Extensor pollicis longus

Answer 42

Abducts wrist Extends MCP and IP joints of digit I

Question 43

Extensor pollicis brevis

Answer 43

Extends MCP joint of digit I

Question 44

Gluteus maximus

Answer 44

Extends hip Laterally rotates hip

Question 45

Gluteus medius

Answer 45

Abducts hip Medially rotates hip

Question 46

Gluteus minimus

Answer 46

Abducts hip Medially rotates hip

Question 47

Tensor fasciae latae

Answer 47

Flexes hip Abducts hip Medially rotates hip

Question 48

Piriformis

Answer 48

A: Laterally rotates hip

Question 49

Obturator internus

Answer 49

A: Laterally rotates hip

Question 50

Obturator externus

Answer 50

A: Laterally rotates hip

Question 51

Inferior gemellus

Answer 51

A: Laterally rotates hip

Question 52

Superior gemellus

Answer 52

A: Laterally rotates hip

Question 53

Quadratus femoris

Answer 53

A: Laterally rotates hip

Question 54

Iliopsoas(Psoas major & iliacus)

Answer 54

Flexes hip Laterally rotates hip

Question 55

Sartorius

Answer 55

A: Flexes hip Abducts hip Laterally rotates hip Flexes knee

Question 56

Rectus Femoris

Answer 56

Flexes hip Extends knee

Question 57

Vastus lateralis

Answer 57

A: Extends knee

Question 58

vastus medialis

Answer 58

A: Extends knee

Question 59

Vastus intermedius

Answer 59

A: Extends knee

Question 60

Biceps femoris

Answer 60

Extends hip Flexes knee

Question 61

semimembranosus

Answer 61

Extends hip Flexes knee

Question 62

semitendinosus

Answer 62

Extends hip Flexes knee

Question 63

Pectineus

Answer 63

Adducts hip Flexes hip

Question 64

Adductor longus

Answer 64

Adducts hip Flexes hip

Question 65

Adductor brevis

Answer 65

Adducts hip Flexes hip

Question 66

Adductor magnus

Answer 66

Both: Adducts hip Adductor: Flexes hip Hamstring: Extends hip

Question 67

Gracilis

Answer 67

Adducts hip Flexes hip Medially rotates hip Flexes knee