Muscle Origins, Insertions, And Actions

Front 1

Sternocleidomastoid Origin

Back 1

Manubrium of sternum and medial portion of clavicle

Front 2

Sternocleidomastiod Insertion

Back 2

Mastoid process of temporal bone

Front 3

Sternocleidomastoid Action

Back 3

Flex

Front 4

Trapezius (Head) Origin

Back 4

Occipital bone, ligamentum nuchae, and spines of C7 and all thoracic vertebrae

Front 5

Trapezius (Head) Insertion

Back 5

Continuous insertion along acromion and spine of scapula and lateral third of clavicle.

Front 6

Trapezius (Head) Action

Back 6

Extend

Front 7

Trapezius (Shoulder) Origin

Back 7

Occipital bone, ligamentum nuchae, and spines of C7 and all thoracic vertebrae

Front 8

Trapezius (Shoulder) Insertion

Back 8

Continous insertion along acromion and spine of scapula and lateral third of clavicle.

Front 9

Trapezius (Shoulder) Action

Back 9

Adduct

Front 10

Rhomboideus Origin

Back 10

Spinous processes of C7 and T1 (Minor) and spinous processes of T2-T5 (Major)

Front 11

Rhomboideus Insertion

Back 11

Medial border of scapula

Front 12

Rhomboideus Action

Back 12

Adduct

Front 13

Levator Scpulae Origin

Back 13

Transverse processes of C1-C4

Front 14

Levator Scpulae Insertion

Back 14

Superior vertebral border of scapula

Front 15

Levator Scpulae Action

Back 15

Elevate

Front 16

Serratus Anterior Origin

Back 16

By a series of muscle slips from ribs 1-8 (or 9)

Front 17

Serratus Anterior Insertion

Back 17

Entire Anterior Surface of vertebral border of scapula

Front 18

Serratus Anterior Action

Back 18

Abduct

Front 19

Pectoralis Minor Origin

Back 19

Anterior surface of ribs 1-5

Front 20

Pectoralis Minor Insertion

Back 20

Coracoid process of scapula

Front 21

Pectoralis Minor Action

Back 21

Abduct

Front 22

Pectoralis Major Origin

Back 22

Clavicle, sternum, cartilage of ribs 1-6, and aponeurosis of external oblique muscle

Front 23

Pectoralis Major Insertion

Back 23

Fibers converge to insert by a short tendon into greater tubercle of humerus

Front 24

Pectoralis Major Action

Back 24

Flex, adduct, med. rotation.

Front 25

Coracobrachialis Origin

Back 25

Coracoid process of scapula

Front 26

Coracobrachialis Insertion

Back 26

Medial surface of humerus shaft

Front 27

Coracobrachialis Action

Back 27

Flex, Adduct, Med. Rotation

Front 28

Deltoid Origin

Back 28

Embraves insertion of trapezius; lateral third of clavicle; acromion and spine of scapula

Front 29

Deltoid Insertion

Back 29

Deltiod tuberosity of humerus

Front 30

Deltoid Action

Back 30

Flex, extend, abduct

Front 31

Latissimus Dorsi Origin

Back 31

Indirect attachment via lumdorsal fascia into spines of lower six thoracic vertebrae, lumbar vertebrae, lower 3-4 ribs, and iliac crest; also from scapula's inferior angle.

Front 32

Latissimus Dorsi Insertion

Back 32

Spirals around teres major to insert in floor of intertubercular groove of humerus

Front 33

Latissimus Dorsi Action

Back 33

Extend, adduct, med. rotation

Front 34

Teres Major Origin

Back 34

Posterior surface of scapula at inferior angle

Front 35

Teres Major Insertion

Back 35

Crest of lesser tubercle on anterior humerus; insertion tendon fused with that of latissumus dorsi.

Front 36

Teres Major Action

Back 36

Adduct, med. rotation

Front 37

Subscapularis Origin

Back 37

Subscapular fossa of scapula

Front 38

Subscapularis Insertion

Back 38

Lesser tubercle of humerus

Front 39

Subscapularis Action

Back 39

Adduct, med. rotation.

Front 40

Supraspinatus Origin

Back 40

Supraspinous fossa of scapula

Front 41

Supraspinatus Insertion

Back 41

Superior part of greater tubercle of humerus

Front 42

Supraspinatus Action

Back 42

Abduct, lateral rotation

Front 43

Infraspinatus Origin

Back 43

infraspinous fossa of scapula

Front 44

Infraspinatus Insertion

Back 44

Greater tubercle of humerus posterior to insertion of supraspinatus

Front 45

Infraspinatus Action

Back 45

Lateral Rotation

Front 46

Biceps Brachii (2) Origin

Back 46

Short Head: Coracoid process

Long Head: Tubercle above glenoid cavity; tnedon of long head tuns within capsule abd descends into intertubercular groove of humerus.

Front 47

Biceps Brachii (2) Insertion

Back 47

By common tendon into radial tuberosity

Front 48

Biceps Brachii (2) Action

Back 48

Flex

Front 49

Brachialis Origin

Back 49

Front of distal half of humerus; embraces insertion of deltoid muscle

Front 50

Brachialis Insertion

Back 50

Coronoid process of ulna and capsule of elbow joint

Front 51

Brachialis Action

Back 51

Flex

Front 52

Brachioradialis Origin

Back 52

Lateral supracondylar ridge at distal end of humerus

Front 53

Brachioradialis Insertion

Back 53

Coronoid process of ulna and capsule of elbow joint

Front 54

Brachioradialis Action

Back 54

Flex

Front 55

Triceps Brachi (2) Origin

Back 55

Long Head: Infraglenoid tubercle of scapula

Lateral Head: Posterior humerus; Medial headl; Posterior humerus distal to radial groove.

Front 56

Triceps Brachi (2) Insertion

Back 56

By common tendon into olecranon process of ulna

Front 57

Triceps Brachi (2) Action

Back 57

Extend

Front 58

Pronator Teres Origin

Back 58

medial epicondyl of humerus; coronoid process of ulna

Front 59

Pronator Teres Insertion

Back 59

By common tendon into lateral radius, midshaft

Front 60

Pronator Teres Action

Back 60

Flexor

Front 61

Flexor Carpi Radialis Origin

Back 61

Medial epicondyl of humerus

Front 62

Flexor Carpi Radialis Insertion

Back 62

Base of second and third metacarpals; insertion tendon easily seen and provides guide to positionof radial artery (used for pulse taking) at wrist

Front 63

Flexor Carpi Radialis Action

Back 63

Flexor

Front 64

Palmaris Longus Origin

Back 64

Medial Epicondyl of Humerus

Front 65

Palmaris Longus Insertion

Back 65

Palmar aponeurosis

Front 66

Palmaris Longus Action

Back 66

Flexor

Front 67

Flexor Carpi Ulnaris Origin

Back 67

Medial epicondyl of humerus, olecranon process, and posterior surface of ulna

Front 68

Flexor Carpi Ulnaris Insertion

Back 68

Pisiform bone and base of fifth metacarpal

Front 69

Flexor Carpi Ulnaris Action

Back 69

Flexor

Front 70

Extensor Carpi Radialis Longus Origin

Back 70

Lateral supracondylar ridge of humerus

Front 71

Extensor Carpi Radialis Longus Insertion

Back 71

Base of second metacarpal

Front 72

Extensor Carpi Radialis Longus Action

Back 72

Extensor

Front 73

Extensor Carpi Radialis Brevis Origin

Back 73

Lateral epicondyl of the humerus

Front 74

Extensor Carpi Radialis Brevis Insertion

Back 74

Base of third metacarpal

Front 75

Extensor Carpi Radialis Brevis Action

Back 75

Extensor

Front 76

Extensor Digitorum Origin

Back 76

Lateral epicondyl of humerus

Front 77

Extensor Digitorum Insertion

Back 77

By four tendons into extensor expansions and distal phalanges of fingers 2-5

Front 78

Extensor Digitorum Action

Back 78

Extensor

Front 79

Extensor Carpi Ulnaris Origin

Back 79

Lateral epicondyl of humerus and posterior border of ulna

Front 80

Extensor Carpi Ulnaris Insertion

Back 80

Base of fifth metacarpal

Front 81

Extensor Carpi Ulnaris Action

Back 81

Extensor

Front 82

Rectus Abdominus (Trunk) Origin

Back 82

Pubic crest and symphasis

Front 83

Rectus Abdominus (Trunk) Insertion

Back 83

Xiphoid process and costal cartilage of ribs 5-7

Front 84

Rectus Abdominus (Trunk) Action

Back 84

Flex

Front 85

External Intercostals Origin

Back 85

Inferior border of rib above

Front 86

External Intercostals Insertion

Back 86

Superior border of rib below

Front 87

External Intercostals Action

Back 87

Elevate

Front 88

Internal Intercostals Origin

Back 88

Superior border of rib below

Front 89

Internal Intercostals Insertion

Back 89

Inferior border (costal groove) of rib above

Front 90

Internal Intercostals Action

Back 90

Depress

Front 91

Scalenes Origin

Back 91

Transverse processes of cervical vertebrae

Front 92

Scalenes Insertion

Back 92

Anterolaterally on first two ribs

Front 93

Scalenes Action

Back 93

Elevate

Front 94

Rectus Abdomimus (Abdomen) Origin

Back 94

Pubic crest and symphasis

Front 95

Rectus Abdomimus (Abdomen) Insertion

Back 95

Xiphoid processes and costal cartilages of ribs 5-7

Front 96

Rectus Abdomimus (Abdomen) Action

Back 96

Flex and Compress

Front 97

External Oblique Origin

Back 97

By fleshy strips from outer surfaces of lower 8 ribs`

Front 98

External Oblique Insertion

Back 98

Most fibers into linea alba; some into pubic crest and tubercle and iliac crest; majority of fibers insert anteriorly via a broad aponeurosis

Front 99

External Oblique Action

Back 99

Compress

Front 100

Internal Oblique Origin

Back 100

Lumbodorsal fascia, iliac crest, and inguinal ligament

Front 101

Internal Olbique Insertion

Back 101

Linea alba, public crest, last three ribs

Front 102

Internal Olbique Action

Back 102

Compress

Front 103

Transverse Abdominus Origin

Back 103

Inguinal ligament, lumbodorsal fascia, cartilages of last 6 ribs, and iliac crest

Front 104

Transverse Abdominus Insertion

Back 104

Linea alba, public crest

Front 105

Transverse Abdominus Action

Back 105

Compress

Front 106

Sartorius (2) Origin

Back 106

Anterior superior iliac spine

Front 107

Sartorius (2) Insertion

Back 107

Winds around medial aspect of knee and inserts into medial aspect of proximal tibia

Front 108

Sartorius (2) Action

Back 108

Flex

Front 109

Rectus Femoris (Thigh) Origin

Back 109

Anterior inferior iliac spine and superior margin of acetabulum

Front 110

Rectus Femoris (Thigh) Insertion

Back 110

Patella and tibial tuberosity via patellar ligament

Front 111

Rectus Femoris (thigh) Action

Back 111

Flex

Front 112

Gluteus Maximus Origin

Back 112

Dorsal ilium, sacrum, and coccyx

Front 113

Gluteus Maximus Insertion

Back 113

Gluteal tuberosity of femur; iliotibial tract

Front 114

Gluteus Maximus Action

Back 114

Extend

Front 115

Gluteus Medius Origin

Back 115

Between anterior and posterior gluteal lines on lateral surface of ilium

Front 116

Gluteus Medius Insertion

Back 116

By short tendon into lateral aspect of greater trochanter of femur

Front 117

Gluteus Medius Action

Back 117

Abduct

Front 118

Gluteus Minimus Origin

Back 118

Between anterior and inferior gluteal lines on external surface of ilium

Front 119

Gluteus Minimus Insertion

Back 119

Anterior border of greater trochanter of femur

Front 120

Gluteus Minimus Action

Back 120

Abduct

Front 121

Tensor Fascia Lata (2) Origin

Back 121

Anterior aspect of iliac crest and anterior superior iliac spine

Front 122

Tensor Fascia Lata (2) Insertion

Back 122

Iliotibial tract (Iliotibial tract is the thickened lateral porion of the fascia lata. It extends as a tendinous band from the iliac crest to the knee)

Front 123

Tensor Fascia Lata (2) Action

Back 123

Abduct

Front 124

Pectineus Origin

Back 124

Pectineal line of pubis (and superior ramus)

Front 125

Pectineus Insertion

Back 125

Inferior to lesser trochanter of posterior aspect of femur

Front 126

Pectineus Action

Back 126

Adduct

Front 127

Gracilis Origin

Back 127

Inferior ramus and body of pubis

Front 128

Gracilis Insertion

Back 128

Medial surface of tibia just inferior to its medial condyl

Front 129

Gracilis Action

Back 129

Adduct

Front 130

Rectus Femoris (Lower Leg) Origin

Back 130

Anterior inferior iliac spie and superior margin of acetabulum

Front 131

Rectus Femoris (Lower Leg) Insertion

Back 131

Patella and tibial via patellar ligament

Front 132

Rectus Femoris (Lower Leg) Action

Back 132

Extend

Front 133

Vastus Lateralis Origin

Back 133

greater trochanter, intertrochanteric line, linea aspera

Front 134

Vastus Lateralis Insertion

Back 134

As for rectus femoris

Front 135

Vastus Lateralis Action

Back 135

Extend

Front 136

Vastus Intermedius Origin

Back 136

Anterior and lateral surfaces of proximal femur shaft

Front 137

Vastus Intermedius Insertion

Back 137

As for rectus femorus

Front 138

Vastus Intermedius Action

Back 138

Extend

Front 139

Vastus Medius Sartorius (2) Origin

Back 139

Linea aspera, intertrochanteric line, andterior superior iliac spine

Front 140

Vastus Medius Sartorius (2) Insertion

Back 140

As for rectus femoris; winds around the medial aspect of the knee and inserts into medial aspect of proximal tibia

Front 141

Vastus Medius Sartorius (2) Action

Back 141

Extend, Flex

Front 142

Biceps Femoris (2) Origin

Back 142

Long Head: Ischial Tuberosity

Short Head: Linea aspera and distal femur

Front 143

Biceps Femoris (2) Insertion

Back 143

Common tendon passes downward and laterally (forming lateral border of popliteal fossa to insert into head of fibula and lateral condyl of tibia)

Front 144

Biceps Femoris (2) Action

Back 144

Flex

Front 145

Semitendinosus (2) Origin

Back 145

ischial tuberosity in common with long head of biceps femoris

Front 146

Semitendinosus (2) Insertion

Back 146

medial aspect of upper tibial shaft

Front 147

Semitendinosus (2) Action

Back 147

Flex

Front 148

Semimembranosus (2) Origin

Back 148

Ischial tuberosity

Front 149

Semimembranosus (2) Insertion

Back 149

Medial condyl of tibia

Front 150

Semimembranosus (2) Action

Back 150

Flex

Front 151

Popliteus Origin

Back 151

lateral condyl of femur

Front 152

Popliteus Insertion

Back 152

proximal tibia

Front 153

Popliteus Action

Back 153

Flex

Front 154

Gracilis (2) Origin

Back 154

Inferior ramus and body of pubis

Front 155

Gracilis (2) Insertion

Back 155

medial surface of tibia just inferior to its medial condyl

Front 156

Gracilis (2) Action

Back 156

Flex

Front 157

Gastrocnemius (2) Origin

Back 157

By two heads from medial and lateral condyles of femur

Front 158

Gastrocnemius (2) Insertion

Back 158

Calcaneus cia calcaneal tendon

Front 159

Gastrocnemius (2) Action

Back 159

Flex

Front 160

Tibialis Anterior Origin

Back 160

Lateral condyl and upper 2/3 of tibia; interosseous membrane

Front 161

Tibialis Anterior Insertion

Back 161

By tendon into inferior surface of medial cuneiform and first metatarsal bone

Front 162

Tibialis Anterior Action

Back 162

Dorsi and Invert

Front 163

Tibialis Posterior Origin

Back 163

Extensive condyl from superior tibia and fibula, and interosseous membrane

Front 164

Tibialis Posterior Insertion

Back 164

Tendon passes behind medial meeleolus and upper arch of foot: inserts into serveral tarsals and metatarsals 2-4

Front 165

Tibialis Posterior Action

Back 165

Plantar and Invert

Front 166

Flexor digitorum Longus Origin

Back 166

Posterior tibia

Front 167

Flexor digitorum Longus Insertion

Back 167

tendon runs behind medial malleolus and splits into four parts to insert into distal phalanges of toes 2-5

Front 168

Flexor digitorum Longus Action

Back 168

Plantar, Flex

Front 169

Extensor Digitorum Longus Origin

Back 169

lateral condyl of tibia; proximal 3/4 of fibula; interosseus membrane

Front 170

Extensor Digitorum Longus Insertion

Back 170

Second and third phalanges of toes 2-5 vi extensor expansion

Front 171

Extensor Digitorum Longus Action

Back 171

Dorsi, Flex

Front 172

Peroneus Longus Origin

Back 172

head and upper portion of fibula

Front 173

Peroneus Longus Insertion

Back 173

By long tendon that curves yunder foot to first metatarsal and medial cuneiform

Front 174

Peroneus Longus Action

Back 174

Plantar and Evert

Front 175

Peroneus Brevus Origin

Back 175

Distal fibula shaft

Front 176

Peroneus Brevus Insertion

Back 176

By tendon running behind lateral malleolus to insert on prrximal end of fifth metatarsal

Front 177

Peroneus Brevus Action

Back 177

Plantar and Evert

Front 178

Gastrocnemius (2) Origin

Back 178

By two heads from medial and lateral condyles of femur

Front 179

Gastrocnemius (2) Insertion

Back 179

Calcaneus cia calcaneal tendon

Front 180

Gastrocnemius (2) Action

Back 180

Plantar and Flex

Front 181

Soleus Origin

Back 181

Extensive come-shaped origin from superior tibia, fibula, and interosseous membrane

Front 182

Soleus Insertion

Back 182

Calcaneus via Calcaneal tendon

Front 183

Soleus Action

Back 183

Plantar and Flex