Anatomy Lab Final - Origin, Insertion, Action

Front 1

orbicularis oculi origin

Back 1

bones of orbit

Front 2

orbicularis oculi insertion

Back 2

tissue of eyelid

Front 3

orbicularis oculi action

Back 3

closes eyes

Front 4

masseter origin

Back 4

zygomatic arch

Front 5

masseter insertion

Back 5

mandible (coronoid process)

Front 6

masseter action

Back 6

lifts mandible; closes jaws

Front 7

orbicularis oris origin

Back 7

maxilla; mandible

Front 8

orbicularis oris insertion

Back 8

lips

Front 9

orbicularis oris action

Back 9

closes and purses lips

Front 10

sternohyoid origin

Back 10

clavicle; manubrium

Front 11

sternohyoid insertion

Back 11

hyoid bone

Front 12

sternohyoid action

Back 12

depresses hyoid bone and larynx

Front 13

sternocleidomastoid origin

Back 13

clavicular head: clavicle
sternal head: manubrium

Front 14

sternocleidomastoid insertion

Back 14

mastoid process; superior nuchal line

Front 15

sternocleidomastoid action

Back 15

together: flex neck
alone: bend or rotate head to side

Front 16

trapezius origin

Back 16

occipital bone; spinous processes of thoracic vertabrae

Front 17

trapezius insertion

Back 17

clavicle; scapula (acromion & spine)

Front 18

trapezius action

Back 18

elevate scapula, neck or clavicle
retract, depress or rotate scapula

Front 19

deltoid origin

Back 19

clavicle; scapula (acromion and spine)

Front 20

deltoid insertion

Back 20

humerus (deltoid tuberosity)

Front 21

deltoid action

Back 21

abducts, extends, and flexes shoulder

Front 22

pectoralis major origin

Back 22

clavicle, sternum, cartilage of ribs 2-6

Front 23

pectoralis major insertion

Back 23

humerus (greater tubercle, intertubercular groover)

Front 24

pectoralis major action

Back 24

flexes, adducts, and rotates shoulder (medially)

Front 25

pectoralis minor origin

Back 25

end of ribs 3-5

Front 26

pectoralis minor insertion

Back 26

scapula (coracoid process)

Front 27

pectoralis minor action

Back 27

depresses shoulder
elevates ribs
rotates scapula

Front 28

biceps brachii origin

Back 28

short head: scapula (coracoid process)
long head: scapula (supraglenoid tubercle)

Front 29

biceps brachii insertion

Back 29

radius (radial tuberosity)

Front 30

biceps brachii action

Back 30

flexes elbow and shoulder
supinates forearm

Front 31

triceps brachii origin

Back 31

lateral head: humerus (superior, lateral surface)
long head: scapula (infraglenoid tubercle)
medial head: humerus (posterior, inferior surface)

Front 32

triceps brachii insertion

Back 32

ulna (olecranon)

Front 33

triceps brachii action

Back 33

extends elbow
long head also extends shoulder

Front 34

brachialis origin

Back 34

humerus (anterior)

Front 35

brachialis insertion

Back 35

ulna (tuberosity)

Front 36

brachialis action

Back 36

flexes elbow

Front 37

subscapularis origin

Back 37

scapula (subscapular fossa)

Front 38

subscapularis insertion

Back 38

humerus (lesser tubercle)

Front 39

subscapularis action

Back 39

rotate shoulder (medially)

Front 40

supraspinatus origin

Back 40

scapula (supraspinous fossa)

Front 41

supraspinatus insertion

Back 41

humerus (greater tubercle)

Front 42

supraspinatus action

Back 42

abduction at shoulder

Front 43

infraspinatus origin

Back 43

scapula (infraspinous fossa)

Front 44

infraspinatus insertion

Back 44

humerus (greater tubercle)

Front 45

infraspinatus action

Back 45

rotates shoulder (laterally)

Front 46

teres major origin

Back 46

scapula (inferior angle)

Front 47

teres major insertion

Back 47

humerus (intertubercular groove)

Front 48

teres major action

Back 48

extends, adducts and rotates (medially) shoulder

Front 49

external intercostal origin

Back 49

inferior border of rib

Front 50

external intercostal insertion

Back 50

superior border of next lowest rib

Front 51

external intercostal action

Back 51

elevate ribs

Front 52

internal intercostal origin

Back 52

superior border of each rib

Front 53

internal intercostal insertion

Back 53

inferior border of next highest rib

Front 54

internal intercostal action

Back 54

depress ribs

Front 55

latissimus dorsi origin

Back 55

spinous processes of lower thoracic and all lumbar vertabrae; thoracolumbar fascia

Front 56

latissimus dorsi insertion

Back 56

humerus (intertubercular groove)

Front 57

latissimus dorsi action

Back 57

extends, adducts, and rotates (medially) shoulder

Front 58

rectus abdominis origin

Back 58

pubis (pubic crest; symphysis pubis)

Front 59

rectus abdominis insertion

Back 59

xiphoid process; costal cartilages of ribs 5-7

Front 60

rectus abdominis action

Back 60

depresses ribs
flexes spine
compresses abdomen

Front 61

external oblique origin

Back 61

ribs 5-12

Front 62

external oblique insertion

Back 62

linea alba; iliac crest

Front 63

external oblique action

Back 63

compresses abdomen
depresses ribs
bends spine

Front 64

internal oblique origin

Back 64

thoracolumbar fascia; iliac crest

Front 65

internal oblique insertion

Back 65

linea alba; costal cartilages of lower ribs; xiphoid process

Front 66

internal oblique action

Back 66

compresses abdomen
depresses ribs
bends spine

Front 67

transversus abdominis origin

Back 67

costal cartilages of ribs 6-12; thoracolumbar fascia; iliac crest

Front 68

transversus abdominis insertion

Back 68

linea alba; pubis

Front 69

transversus abdominis action

Back 69

compresses abdomen

Front 70

sartorius origin

Back 70

anterior superior iliac spine

Front 71

sartorius insertion

Back 71

tibia (medial surface)

Front 72

sartorius action

Back 72

flexes knee
flexes and rotates (laterally) at hip

Front 73

vastus lateralis origin

Back 73

femur (greater trochanter; linea aspera)

Front 74

vastus lateralis insertion

Back 74

tibia (tibial tuberosity)

Front 75

vastus lateralis action

Back 75

extends knee

Front 76

rectus femoris origin

Back 76

anterior inferior iliac spine; rim of ilium

Front 77

rectus femoris insertion

Back 77

tibia (tibial tuberosity)

Front 78

rectus femoris action

Back 78

extends knee
flexes hip

Front 79

vastus medialis origin

Back 79

femur (linea aspera)

Front 80

vastus medialis insertion

Back 80

tibia (tibial tuberosity)

Front 81

vastus medialis action

Back 81

extends knee

Front 82

gracilis origin

Back 82

inferior ramus of pubis

Front 83

gracilis insertion

Back 83

tibia (medial surface)

Front 84

gracilis action

Back 84

flexes knee
adducts and rotates (medially) at hip

Front 85

semimembranosus origin

Back 85

ischial tuberosity

Front 86

semimembranosus insertion

Back 86

tibia (medial condyle)

Front 87

semimembranosus action

Back 87

flexes knee
extends and rotates (medially) at hip

Front 88

semitendinosus origin

Back 88

ischial tuberosity

Front 89

semitendinosus insertion

Back 89

tibia (medial surface, near insertion of gracilis)

Front 90

semitendinosus action

Back 90

flexes knee
extends and rotates (medially) at hip

Front 91

biceps femoris origin

Back 91

ischial tuberosity; linea aspera

Front 92

biceps femoris insertion

Back 92

fibula (head); tibia (lateral condyle)

Front 93

biceps femoris action

Back 93

flexes knee
extends and rotates (laterally) at hip

Front 94

gastrocnemius origin

Back 94

femur (both condyles)

Front 95

gastrocnemius insertion

Back 95

calcaneus

Front 96

gastrocnemius action

Back 96

extends ankle
inversion of foot
flexes knee