Muscles

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created 4 years ago by caroline_lurz44
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Action, Origin, and Insertion
updated 4 years ago by caroline_lurz44
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1

Temporalis

-Action

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Closes Jaw

2

Masseter

-Action

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Closes Jaw

3

Platysma

-Action

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Tenses neck, depresses jaw

4

Digastric

-Action

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Opens mouth, depresses jaw

5

Sternohyoid

-Action

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depresses larynx/hyoid to swallow

6

Epicranius (Frontal and Occipital)

-Action

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Frontal- raises eyebrows

Occipital- pulls scalp posteriorly

7

Zygomaticus

-Action

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raises lateral corners of mouth to smile

8

Depressor Anguli Oris

-Action

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Draws corners of mouth down to frown

9

Buccinator

-Action

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Compresses cheek, blowing out air

10

Orbicularis Oculi

-Action

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Closes eye

11

Orbicularis Oris

-Action

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Closes lips

12

Sternocleidomastoid

-Action, origin, insertion

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Action: unilateral-oppositional rotation, bilateral neck flexion

Origin: medial clavicle, manubrium

Insertion: Mastoid process

13

Semispinalis

-Action, origin, insertion

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Action: extension of head and neck

Origin: T-process of C7-T12

Insertion: S-process of C1-T4, occiput

14

Erector Spinae

-Action, origin, insertion

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Action: lateral flexion and extension of neck and torso

Origin: illiac crest, t-processes, ribs

Insertion: T-processes (above origin) and ribs

15

Splenius

-Action, origin, insertion

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Action: Extension, rotation, and lateral flexion of head and neck

Origin: S-process of C7-T6, nuchal ligament

Insertion: T-process of cervical vertebrae, mastoid process, occiput

16

Rectus Abdominus

-Action, origin, insertion

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Action: flexion of torso

Origin: pubic bone

Insertion: xiphoid process, costal cartilage 5-7

17

External Oblique

-Action, origin, insertion

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Action: compresses abdominal wall, flexes, rotates, and lateral flexion of trunk

Origin: Anterior lower 8 ribs

Insertion: linea alba, pubic crest, illiac crest

18

Internal Oblique

-Action, origin, insertion

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Action: compresses abdominal wall, flexes, rotates, and lateral flexion of trunk

Origin: lumbar fascia, illiac crest, inguinal ligament

Insertion: linea alba, last 3 ribs

19

Transverse Abdominus

-Action, origin, insertion

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Action: compresses abdominal wall, lateral rotation of trunk

Origin: inguinal ligament, illiac crest, costal cartilage 5/6

Insertion: linea alba, pubic crest

20

Quadratus Lumborum

-Action, origin, insertion

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Action: unilateral-lateral flexion, bilateral-lumbar extension, postural muscle

Origin: illiac crest, lumbar fascia

Insertion: rib 12, T-processes of L-vertebrae

21

Scalenes

-Action, origin, insertion

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Action: aid inspiration (lift ribs 1/2)

Origin: T processes of C vertebrae

Insertion: Ribs 1/2 anteriorlaterally

22

Diaphragm

-Action

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Inhalation

23

External Intercostals

-Action, origin, insertion

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Action: aids inspiration

Origin: Rib above

Insertion: rib below

24

Internal Intercostals

-Action, origin, insertion

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Action: aids expiration

origin: rib below

insertion: rib above

25

Trapezius

-Action, origin, insertion

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Action: head extension, raises, stabilizes, rotates and retracts scapula

Origin: occiput, s-process C7-T12

Insertion: acromian and spine of scapula, lateral clavicle

26

Levator Scapulae

-Action, origin, insertion

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Action: elevates and retracts scapula

origin: t-process of C1-C4

insertion: superior angle of scapula

27

Pectoralis Minor

-action, origin, insertion

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action: draws scapula forward and down

origin: anterior surface of ribs 3-5

insertion: coracoid process of scapula

28

Serratus Anterior

-action, origin, insertion

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action: protraction, rotation of scapula

origin: ribs 1-8 laterally

insertion: anterior medial border of scapula

29

Rhomboid

-action ,origin, insertion

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action: scapular retraction and stabilization

origin: C7-T5

insertion: medial scapular border

30

Deltoid

-action, origin, insertion

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action: abduction, flexion and extension of shoulder

origin: lateral clavicle, acromian and spine of scapula

insertion: deltoid tuberosity

31

Teres Major

-action, origin, insertion

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action: extension, medial rotation and adduction of arm at the shoulder

origin: posterior inferior lateral margin of scapula

insertion: intertuburcular groove (humerus)

32

Pectoralis Major

-action, origin, insertion

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action: flexion, adduction and medial rotation of arm at shoulder

origin: clavicle, sternum and costal cartilage 1-6

insertion: intertubercular groove (humerus)

33

Lattisimus Dorsi

-action, origin, insertion

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action: extension, adduction, and medial rotation of arm at shoulder

origin: illiac crest, last 3-4 ribs, T7-L5

insertion: intertubercular groove (humerus)

34

Rotator Cuff (S.I.T.S)

Infraspinatus

-action, origin, insertion

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action: lateral rotation of the shoulder, stabilizes GH

origin: infraspinous fossa

insertion: greater tubercle (humerus)

35

Rotator Cuff (S.I.T.S)

supraspinatus

-action, origin, insertion

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action: begins abduction of shoulder, stabilizes GH

origin: supraspinous fossa

insertion: greater tubercle (humerus)

36

Rotator Cuff (S.I.T.S)

subscapularis

-action, origin, insertion

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action: medial rotation of shoulder, stabilizes GH

origin: subscapularis fossa

insertion: lesser tubercle (humerus)

37

Rotator Cuff (S.I.T.S)

teres minor

-action, origin, insertion

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action: lateral rotation of shoulder, stabilizes GH

origin: posterior lateral margin of scapula

insertion: greater tubercle (humerus)

38

Triceps Brachii

action, origin, insertion

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action: elbow extension, extension of arm at shoulder

origin: infraglenoid tuberosity, posterior humerus; radial groove

insertion: olecranon process

39

Biceps Brachii

action, origin, insertion

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action: flexion of elbow and supination of forearm, weak flexion of arm at shoulder

origin: coracoid process, supraglenoid tubercle

insertion: radial tuberosity

40

Brachioradilis

action, origin, insertion

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action: flexion of elbow

origin: superior to lateral epicondyle of humerus

insertion: radial styloid process

41

Brachialis

action, origin, insertion

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action: flexion of elbow

origin: distal anterior humerus

insertion: coronoid process of ulna

42

Pronator Teres

action, origin, insertion

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action: pronation of forearm

origin: supracondylar ridge of humerus and coronoid process of ulna

insertion: middle lateral body of radius

43

Pronator Quadratus

action, origin, insertion

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action: pronation of forearm

origin: distal anterior ulna

insertion: anterior distal radius

44

Supinator

action, origin, insertion

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action: supination of forearm

origin: lateral epicondyle of humerus and proximal ulna

insertion: proximal radius

45

Flexor Carpi Radialis

-action

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Flexion and abduction of wrist

46

Palmaris Longus

-action

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very weak wrist flexor

47

Flexor Carpi Ulnaris

-action

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flexion and adduction of wrist

48

Flexor Digitorum Superficialis

-action

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Flexion of wrist and middle phalange of 2-5

49

Flexor Pollicis Longus

-action

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Flexion of the thumb

50

Flexor Digitorum Profundus

-action

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Flexion of the distal phalanges

51

Extensor Carpi Radialis

-action

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extension and abduction of the wrist

52

Extensor Digitorum

-action

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Digit extension

53

Extensor Carpi Ulnaris

-action

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extension and adduction of wrist

54

Extensor Pollicus

-action

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extension of thumb

55

Abductor Pollicis Longus

-action

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abduction and extension of thumbs

56

Illiopsoas

(illiacus)

-action, origin, insertion

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action: flexion of trunk at the hip, flexion of thigh at the hip

origin: illiac fossa

insertion: lesser trochanter (femur)

57

Illiopsoas

(Psoas major)

-action, origin, insertion

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action: flexion of trunk at the hip, flexion of thigh at the hip

origin: vertebra and discs of T12-L5

insertion: lesser trochanter (femur)

58

Sartorius

-action, origin, insertion

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action:flexion, abduction and lateral rotation of thigh at hip, flexion of knee

origin: ASIS

insertion: medial proximal tibia

59

Adductors (magnus, longus, and brevis)

-action, origin, insertion

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action: adduction of thigh at the hip

origin: pubis

insertion: linea aspera, lateral distal femur

60

Pectineus

-action, origin, insertion

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action: adduction and flexion of thigh at him

origin: pubis

insertion: linea aspera to lesser trachanter (femur)

61

Gracilis

-action, origin, insertion

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action: adduction and flexion of thigh at the hip, flexion of knee

origin: pubis

insertion: medial tibia inferior to medial condyle

62

Tensor Fascia Late (TFL)

-action, origin, insertion

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action: abduction and flexion of thigh at the hip

origin: anterior illiac crest

insertion: IT band (tract)

63

Gluteus Maximus

-action, origin, insertion

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action: Extension, lateral rotation and abduction of thigh at the hip

origin: posterior illium, sacrum and coccyx

insertion: gluteal tuberosity and IT band

64

Gluteus Medius

-action, origin, insertion

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action: abduction and medial rotation of thigh at hip

origin: upper lateral surface of illiim

insertion: greater trochanter (femur)

65

Gluteus Minimus

-action, origin, insertion

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action: abduction and medial rotation of thigh at the hip

origin: lower lateral surface of illiim

insertion: greater trochanter (femur)

66

Quads

Rectus Femoris

-action, origin, insertion

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action: extension of knee, flexion of thigh at hip

origin: AIIS

insertion: tibial tuberosity via patellar tendon

67

Quads

Vastus Lateralis

-action, origin, insertion

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action: extension of knee

origin: greater trochanter (femur), linea aspera

insertion: tibial tuberosity via patellar tendon

68

Quads

Vastus Medialis

-action, origin, insertion

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action: extension of knee, patellar stabilization

origin: linea aspera and intertrochantric line

insertion: tibial tuberosity via patellar tendon

69

Quads

Vastus Intermedius

-action, origin, insertion

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action: extension of knee

origin: anterior lateral femur

insertion: tibial tuberosity via patellar tendon

70

Hamstrings

Biceps Femoris

-action, origin, insertion

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action: flexion of the knee, extension of the thigh at hip

origin: ischial tuberosity, linea aspera, distal femur

insertion: head of fibula, lateral condyle of tibia

71

Hamstrings

Semitendinosus

-action, origin, insertion

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action: flexion of the knee, extension and medial rotation of thigh at the hip

origin: ischial tuberosity

insertion: proximal tibial shaft

72

Hamstrings

Semimembranosus

-action, origin, insertion

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action: flexion of the knee, extension and medial rotation of thigh at the hip

origin: ischial tuberosity

insertion: medial condyle of tibia, lateral condyle of femur

73

Peroneus (fibularus) longus/brevis

-action, origin, insertion

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action: plantar flexion and eversion of ankle

origin: fibula and lateral condyle of tibia

insertion: metatarsals

74

Tibialis Anterior

-action, origin, insertion

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action: dorsiflexion and inversion of the ankle

origin: lateral condyle and upper 2/3 of tibia

insertion: cuneiform and metatarsal 1

75

Extensor Digitorum Longus

-action

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extension of toes, dorsiflexion of ankle

76

Extensor Hallucis Longus

-action

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extension of first digit

77

Gastrocnemius

-action, origin, insertion

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action: plantar flexion of the ankle, slight flexion of knee

origin: medial and lateral condyles of femur

insertion: calcaneus

78

Soleus

-action, origin, insertion

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action: plantar flexion of the ankle

origin: proximal tibia and fibula

insertion: calcaneus

79

Popliteus

-action, origin, insertion

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action: unlocks the knee and begins knee flexion

origin: lateral condyle of femur

insertion: proximal posterior tibia

80

Tibialis Posterior

-action, origin, insertion

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action: ankle inversion

origin: superior posterior tibia and fibula

insertion: tarsals

81

Flexor digitorum longus

-action

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flexion of the toes

82

Flexor hallucis longus

-action

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flexion of 1st digit, plantar flexion of angle