Muscles and Actions Flashcards


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created 9 years ago by twinklestar
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anatomy and physiology
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1

Orbicularis Oculi

closes eyes

2

Zygomaticus- Major and Minor

raises lateral corners of mouth upward (smiling muscle)

3

Orbicularis Oris

closes lips

4

Mentalis

wrinkles chin

5

Buccinator

compresses cheek

6

Masseter

prime mover of jaw closure

7

Temporalis

closes jaw

8

Medial Pterygoid

in conjunction with lateral pterygoid, aids in grinding movements

9

Lateral Pterygoid

aids in grinding movements of teeth

10

Platysma

tenses skin of neck

11

Sternocleidomastoid

flexion of neck forward; rotate head toward shoulder on opposite side

12

Scalenes- anterior, middle, and posterior

elevate ribs 1-2

13

Pectoralis Major

Prime mover of arm flexion; adducts, medially rotates arm

14

Serratus Anterior

prime mover to protract and hold scapula against chest wall; rotates scapula

15

Deltoid

acting as a whole, prime mover of arm abduction

16

Pectoralis Minor

with ribs fixed draws scapula forward and inferiorly

17

Diaphragm

prime mover of inspiration flattens on contraction

18

Rectus Abdominis

flexes and rotates vertebral column

19

External Oblique

flexes and rotates vertebral column; compresses abdominal wall; trunk rotation and lateral flexion

20

Internal Oblique

flexes and rotates vertebral column; compresses abdominal wall; trunk rotation and lateral flexion

21

Transversus Abdominis

compresses abdominal contents

22

Trapezius

raises, rotates, and retracts (adducts) scapula and stabilizes it

23

Latissimus Dorsi

prime mover of arm extension; adducts and medially rotates arm

24

Infraspinatus

lateral rotation of humerus

25

Teres Minor

lateral rotation of humerus

26

Teres Major

Extends, medially rotates, and adducts humerus

27

Supraspinatus

initiates abduction of humerus

28

Levator Scapulae

elevates and adducts scapula

29

Rhomboids- major and minor

stabilize scapula

30

Erector Spinae

extend and bend the vertebral column laterally; fibers of the longissimus also extend head

31

Quadratus Lumborum

each flexes vertebral column laterally

32

Triceps Brachii

powerful forearm extensor

33

Biceps Brachii

flexion (powerful) of elbow and supination of forearm

34

Brachioradialis

synergist in forearm flexion

35

Brachialis

a major flexor of forearm

36

Pronator Teres

pronate forearm

37

Flexor Carpi Radialis

powerful flexor of wrist; abducts hand

38

Palmaris Longus

tenses skin and fascia of palm

39

Flexor Carpi Ulnaris

powerful flexor of wrist; adducts hand

40

Flexor Digitorum Superficialis

Flexes wrist and middle phalanges of fingers 2-5

41

Flexor Pollicis Longus

flexes thumb

42

Flexor Digitorum Profundus

flexes distal phalanges

43

Pronator Quadratus

pronates forearm

44

Extensor Carpi Radialis Longus

extends and abducts wrist

45

Extensor Carpi Radialis Brevis

extends and abducts wrist

46

Extensor Digitorum

prime mover of finger extension

47

Extensor Carpi Ulnaris

extends and adducts wrist

48

Extensor Pollicis Longus and Brevis

extend thumb

49

Abductor Pollicis Longus

abducts and extends thumb

50

Supinator

acts with biceps brachii to supinate forearm

51

Iliopsoas- Iliacus and Psoas Major

flex trunk on thigh; flex thigh; lateral flexion of vertebral column (psoas)

52

Sartorius

flexes, abducts, and laterally rotates thigh; flexes knee

53

Adductors- Magnus, Longus, and Brevis

adduct and medially rotate and flex thigh

54

Pectineus

adducts, flexes, and medially rotates thigh

55

Gracilis

adducts thigh; flexes and medially rotates leg

56

Rectus Femoris

extends knee and flexes thigh at hip

57

Vastus Lateralis

extends and stabilizes knee

58

Vastus Medialis

extends knee

59

Vastus Intermedius

extends knee

60

Tensor Fasciae Latae

steadies trunk

61

Gluteus Maximus

powerful thigh extensor

62

Gluteus Medius

abducts and medially rotates thigh

63

Gluteus Minimus

abducts and medially rotates thigh

64

Biceps Femoris

extends thigh; flexes knee

65

Semitendinosus

extends thigh; flexes knee

66

Semimembranosus

extends thigh; flexes knee

67

Fibularis (Peroneus) Longus

plantar flexes and everts foot

68

Fibularis (Peroneus) Brevis

plantar flexes and everts foot

69

Tibialis Anterior

prime mover of dorsiflexion

70

Extensor Digitorum Longus

prime mover of toe extension

71

Fibularis (Peroneus) Tertius

dorsiflexes and everts foot

72

Extensor Hallucis Longus

extends great toe

73

Gastrocnemius

plantar flexes foot

74

Soleus

plantar flexion

75

Popliteus

flexes and rotates leg medially to "unlock" extended knee when knee flexion begins

76

Tibialis Posterior

prime mover of foot inversion

77

Flexor Digitorum Longus

flexes toes; plantar flexes and inverts foot

78

Flexor Hallucis Longus

flexes great toe; plantar flexes and inverts foot