Orgins, Insertions, And Actions Of The Muscles

Front 1

Rectus Femoris

Back 1

Origin: Anterior Inferior Iliac Spine

Insertion: Tibial Tuberosity

Action: Extends Knee, Flexes Hip

Front 2

Vastus Lateralis

Back 2

Origin: Greater Trochanter and Linea Aspera

Insertion: Tibial Tuberosity

Action: Extends Knee

Front 3

Vastus Intermedius

Back 3

Origin: Shaft of Femur

Insertion: Tibial Tuberosity

Action: Extends Knee

Front 4

Vastus Medialis

Back 4

Origin: Intertrochanteric line and Linea Aspera

Insertion: Tibial Tuberosity

Action: Extends Knee

Front 5

Sartorius

Back 5

Origin: Anterior Superior Iliac Spine

Insertion: Pes Anserinus

Action: Flexes and Laterally rotates Hip, Flexes knee

Front 6

Psoas Major

Back 6

Origin: Transverse Processes of T12-L5

Insertion: Lesser Trochanter

Action: Flexes and Laterally Rotates Hip

Front 7

Iliacus

Back 7

Origin: Iliac Fossa

Insertion: Lesser Trochanter

Action: Flexes and Laterally Rotates Hip

Front 8

Pectineus

Back 8

Origin: Superior Ramus of Pubis

Insertion: Lesser Trochanter

Action: Flexes, adducts, and laterally rotates hip joint

Front 9

Gracilis

Back 9

Origin: Inferior Ramus/Body of Pubis

Insertion: Pes Anserinus

Action: Adducts Hip

Front 10

Adductor Longus

Back 10

Origin: Superior Ramus of Pubis

Insertion: Linea Aspera

Action: Adducts Hip

Front 11

Adductor Brevis

Back 11

Origin: Inferior Ramus of Pubis

Insertion: Linea Aspera

Action: Adducts Hip

Front 12

Adductor Magnus

Back 12

Origin: Inferior Ramus of Pubis, Ramus of ischium, and Ischial Tuberosity

Insertion: Linea Aspera

Action: Adducts Hip

Front 13

Biceps Femoris

Back 13

Origin: Ischial Tuberosity and Linea Aspera

Insertion: Head of Fibula

Action: Extends/Laterally Rotates Hip, Flexes Knee

Front 14

Semimembranosus

Back 14

Origin: Ischial Tuberosity

Insertion: Medial Condyle of Tibia

Action: Extends/Medially Rotates Hip, Flexes Knee

Front 15

Semitendinosus

Back 15

Origin: Ischial Tuberosity

Insertion: Per Anserinus

Action: Extends/ Medially Rotates Hip, Flexes Knee

Front 16

Tibialis Anterior

Back 16

Origin: Lateral Surface of Tibia

Insertion: First metarsal and Medial Cuneiform

Action: Dorsiflexion and Inversion

Front 17

Extensor Digitorum Longus

(action only)

Back 17

Action: Extends digits 2-5

Front 18

Extensor Hallucis Longus

(action only)

Back 18

Action: Extends digit 1

Front 19

Fibularis Longus

(action only)

Back 19

Action: Plantar Flexion and eversion

Front 20

Fibularis Brevis

(action only)

Back 20

Action: Plantar Flexion and eversion

Front 21

Fibularis Tertius

(action only)

Back 21

Action: Dorsiflexion and eversion

Front 22

Gastrocnemius

Back 22

Origin: Medial/Lateral Epicondyles of femur

Insertion: Calcaneal Tuberosity

Action: Flexes knee, Plantar Flexion

Front 23

Plantaris

Back 23

Origin: Lateral Supracondylar Ridge of Femur

Insertion: Calcaneal Tuberosity

Action: Plantar Flexion

Front 24

Soleus

Back 24

Origin: Soleal Line, Head of Fibula

Insertion: Calcaneal Tuberosity

Action: Plantar Flexion

Front 25

Popliteus

Back 25

Origin: Lateral Condyle of Femur

Insertion: Posterior surface of Tibia

Action: Unlocks knee

Front 26

Flexor Hallucis Longus

(action only)

Back 26

Action: Flexes digits 1

Front 27

Flexor Digitorum Longus

(action only)

Back 27

Action: Flexes digits 2-5

Front 28

Extensor Hallucis Brevis

(Action only)

Back 28

Action: Extends Digit 1

Front 29

Extensor Digitorum Brevis

(Action only)

Back 29

Action: extends digits 2-5

Front 30

Gluteus Maximus

Back 30

Origin: Iliac Crest, Sacrum, coccyx

Insertion: Gluteal Tuberosity, linea aspera, Ilitibial tract

Action: Extends/Laterally Rotates Hip

Front 31

Gluteus Minimus

Back 31

Origin: Gluteal Surface

Insertion: Anterolateral Surface of the Greater Trochanter

Action: Abducts/Medially Rotates Hip

Front 32

Tensor Fasciae Latae

Back 32

Origin: Anterior Superior Iliac Spine and Iliac Crest

Insertion: Iliotibial Tract

Action: Abducts Hip

Front 33

Rectus Abdominis

Back 33

Origin: Pubic Crest

Insertion: xiphoid process and costal Cartilage

Actio: Flexes Spine

Front 34

Abdominal Obliques

(Action Only)

Back 34

Action: flexes and rotates spine

Front 35

Temporalis

Back 35

Origin: Temporal Bone

Insertion: Coronoid process of mandible

Action: Elevates and retracts mandible

Front 36

Masseter

Back 36

Origin- Zygomatic Arch

Insertion- Coronoid Process/Angle of Mandible

Action- Elevates/Retracts Mandible

Front 37

Medial Pterygoid

Back 37

Origin: Maxilla, Palentine Bone, and Lateral Pterygoid Plate

Insertion: Ramus of the Mandible

Action: Excursion and Elevates Mandible

Front 38

Lateral Pterygoid

Back 38

Origin: Greater wing of Sphenoid Bone and Lateral Pterygoid Plate

Insertion: Condylar provess of Mandible

Action: Excursion, depresses, and protracts mandible

Front 39

Digastric

Back 39

Origin: Mental Protuberance and Mastoid Process

Insertion: Hyoid Bone

Action: Elevates Hyoid, depresses mandible

Front 40

Mylohyoid

Back 40

Origin: Mandible

Insertion: Hyoid Bone

Action: Elevates Hyoid, depresses mandible

Front 41

Sternocleidomastoid

Back 41

Origin: Sternum and Clavicle

Insertion: Mastoid Process

Action: Rotates Head, flexes/laterally flexes neck

Front 42

Splenius Capitis

Back 42

Origin: Spinous Process of C3-C7

Insertion: Lateral Superior Nuchal Line, Mastoid Process

Action: Rotates head, extends/laterally flexes neck

Front 43

Trapezius

Back 43

Origin: Superior nuchal line, Spinous Process of C7-T12

Insertion: Clavicle, Acromion Process, and spine of scapula

Action: Elevates and retracts scapula, extends neck

Front 44

Levator Scapulae

Back 44

Origin: Transverse Processes of C1-C4

Insertion: Medial Border/Superior Angle of Scapula

Action: Elevates scapula

Front 45

Rhomboid Minor

Back 45

Origin: Spinous Processes of C7-T1

Insertion: Medial Border of Scapula

Action: Elevates/ Retracts Scapula

Front 46

Rhomboid Major

Back 46

Origin: Spinous Processes of T2-T5

Insertion and Action the same as Minor

Front 47

Serratus Anterior

Back 47

Origin: Ribs 1-8

Insertion: Medial Border of Scapula

Action: Protracts Scapula

Front 48

Pectoralis Minor

Back 48

Origin: Ribs 3-5

Insertion: Coracoid Process of Scapula

Action: Protracts/Depresses Scapula

Front 49

Erector Spinae

(Action Only)

Back 49

Action: Extends Neck and Spine

Front 50

Deltoid

Back 50

Origin: S.A.C. (clavicle, acromion process, spine of scapula)

Insertion: Deltoid tuberosity

Action: Flexes, extends, abducts shoulder

Front 51

Coracobranchialis

Back 51

Origin: Scapula's Coracoid Process

Insertion: Medial Shaft of Humorus

Action: Flexes/Adducts Shoulder

Front 52

Biceps Brachii

Back 52

Origin: Supraglenoid Tubercke, Coracoid Process

Insertion: Radial Tuberosity

Action: Flexes/Supinates elbow, Flexes Shoulder

Front 53

Triceps Brachii

Back 53

Origin: Infraglenoid Tubercle, Shaft of Humerus

Insertion: Olecranon process of Ulna

Action: Extends shoulder, extends elbow

Front 54

Supraspinatus

Back 54

Origin: Supraspinous Fossa

Insertion: Greater tubercle of Humerus

Action: Abducts Shoulder

Front 55

Infraspinatus

Back 55

Origin: Infraspinous Fossa

Insertion: Greater tubercle of Humorus

Action: Laterally rotates shoulder

Front 56

Teres Minor

Back 56

Origin: Lateral Border of scapula

Insertion: Greater tubercle of humerus

Action: Adducts/laterally rotates shoulder

Front 57

Subscapularis

Back 57

Origin: Subscapular Fossa

Insertion: Lesser Tubercle of Humerus

Action: Medially Rotates Shoulder

Front 58

Pectoralis Major

Back 58

Origin: Clavicle, Sternum, ribs 2-6

Insertion: Intertubercular groove

Action: Flexes, adducts, medially rotates shoulder

Front 59

Teres Major

Back 59

Origin: Lateral Border/Inferior angle of scapula

Insertion: Intertubercular groove of humerus

Action: Extends, adducts, medially rotates shoulder

Front 60

Latissimus Dorsi

Back 60

Origin: Spinous processes of T7-T12, Ribs 8-12, iliac crest, thoracolumbar fascia

Insertion: Intertubcular groove

Action: Extends, adducts, medially rotates shoulder

Front 61

Brachialis

Back 61

Origin: Anterior Shaft of humerus

Insertion: coronoid process of ulna

action: Flexes elbow

Front 62

Brachioradialis

Back 62

Origin: Lateral Supracondylar ridge of humerus

Insertion: Styloid Process of Radius

Action: Flexes Elbow

Front 63

Supinator

Back 63

Origin: Lateral Epicondyle of Humerus

Insertion: Lateral surface of radius

Action: Supination

Front 64

Pronator Teres

Back 64

Origin: Medial Epicondyle of Humerus/Coronoid Process of Ulna

Insertion: Lateral surface of radius

Action: Pronation

Front 65

Anconeus

(Action Only)

Back 65

Action: Extends Elbow

Front 66

Extensor Carpi Radialis Longus

(Action Only)

Back 66

Action:Extends Wrist

Front 67

Extensor Carpi Radialis Brevis

(Action Only)

Back 67

Action: Extends Wrist

Front 68

Extensor Carpi Ulnaris

(Action Only)

Back 68

Action: Extends Wrist

Front 69

Abductor Pollicis Longus

(Action Only)

Back 69

Action: Abducts Digit 1

Front 70

Extensor Digitorum

(Action Only)

Back 70

Action: Extends digits 2-5

Front 71

Extensor Indicis

(Action Only)

Back 71

Action: Extends digit 2

Front 72

Extensor Digiti Minimi

(Action Only)

Back 72

Action: Extends Digit 5

Front 73

Flexor Carpi Ulnaris

(Action Only)

Back 73

Action: Flexes Wrist

Front 74

Flexor Carpi Radialis

(Action Only)

Back 74

Action: Flexes wrist

Front 75

Palmaris Longus

(Action Only)

Back 75

Action: Flexes Wrist

Front 76

Flexor Pollicis Longus

(Action Only)

Back 76

Action: Flexes Digit 1

Front 77

Flexor Digitorum Superficialis

(Action Only)

Back 77

Action: Flexes digits 2-5

Front 78

Flexor Digitorum Profundus

(Action Only)

Back 78

Action: Flexes Digits 2-5