Muscles O & I Harris

Front 1

Trapezius

Back 1

O: Base of the skull spinous processes of 7th cervical and all thoracic vertebrae

I: Spine of the scapula, acromion process, outer clavicle

Front 2

Rhomboids

Back 2

O: Spinous processes of 7th cervical and upper 5 thoracic vertebrae

I: Medial border of scapula, below the spine

Front 3

Levator Scapula

Back 3

O: Transverse processes of upper 4 cervical vertegrae

I: Superior angle of scapula

Front 4

Pectoralis Minor

Back 4

O: Anterior trunk of ribs 3, 4, & 5

I: Corocoid process

Front 5

Muscles that move the pectoral (shoulder) girdle Serratus Anterior

Back 5

O: Side of crest of the upper 9 ribs I: Medial border of the scapula

Front 6

Muscles that move the pectoral (shoulder) girdle Subclavius

Back 6

O: Costal cartilage of 1st rib I: Middle 1/3 of clavicle

Front 7

Muscles that cross the shoulder joint and move the humerus Pectoralis Major

Back 7

O: Medial clavicle, costal cartilage of ribs 2-6, adjacent sternum I: Greater tubercle, intertubercular groove

Front 8

Muscles that cross the shoulder joint and move the humerus Deltoid

Back 8

O: Lateral 1/3 of clavicle, acromion process, spine of scapula I: Deltoid tuberosity of the humerus

Front 9

Muscles that cross the shoulder joint and move the humerus Supraspinatus

Back 9

O: Supraspinous fossa I: Greater tubercle

Front 10

Muscles that cross the shoulder joint and move the humerus Subscapularis

Back 10

O: Subscapular fossa I: Lesser tubercle

Front 11

Muscles that cross the shoulder joint and move the humerus Infraspinatus

Back 11

O: Infraspinous fossa I: Greater tubercle

Front 12

Muscles that cross the shoulder joint and move the humerus Teres Minor

Back 12

O: Middle lateral border of the scapula I: Greater tubercle

Front 13

Muscles that cross the shoulder joint and move the humerus Teres Major

Back 13

O: Lateral border of scapula at inferior angle I: Intertubercular groove, greater tubercle

Front 14

Muscles that cross the shoulder joint and move the humerus Latissimus Dorsi

Back 14

O: Spinous process of lower 6 thoracic & all lumbar vertebrae, posterior sacrum, lower 3 ribs, iliac crest I: Intertubercular groove

Front 15

Muscles that cross the shoulder joint and move the humerus Coracobrachialis

Back 15

O: Coracoid process I: Medial humerus, across from the deltoid tuberosity

Front 16

Muscles that cross the elbow joint and move the forearm Brachialis

Back 16

O: Lower half of humerus I: Coronoid process, ulnar tuberosity

Front 17

Muscles that cross the elbow joint and move the forearm Brachioradialis

Back 17

O: Ridge above lateral epicondyle of humerus I: Styloid process of radius

Front 18

Muscles that cross the elbow joint and move the forearm Biceps Brachii

Back 18

O: Glenoid fossa, Coracoid process I: Radial tuberosity

Front 19

Muscles that cross the elbow joint and move the forearm Triceps Brachii

Back 19

O: Lateral border of scapula, upper half of humerus, lower 2/3 of humerus I: Olecranon process

Front 20

Muscles that cross the elbow joint and move the forearm Anconeus

Back 20

O: Lateral epicondyle of humerus I: Upper ulna

Front 21

Muscles that cross the radioulnar joint and rotate the forearm Pronator Teres

Back 21

O: Medial epicondyle of humerous, coronoid process I: Middle portion of radius

Front 22

Muscles that cross the radioulnar joint and rotate the forearm Pronator Quadratus

Back 22

O: Lower 1/4 of ulna I: Lower 1/4 of radius

Front 23

Muscles that cross the radioulnar joint and rotate the forearm Supinator

Back 23

O: Lateral epicondyle, radial notch of ulna I: Upper 1/3 of radius

Front 24

Muscles that cross the wrist and move the hand Palmaris Longus

Back 24

O: Medial epicondyle I: Palmar aponeurosis

Front 25

Muscles that cross the wrist and move the hand Flexor Carpi Radialis

Back 25

O: Medial epicondyle I: Base of 2nd and 3rd metacarpals

Front 26

Muscles that cross the wrist and move the hand Flexor Carpi Ulnaris

Back 26

O: Medial epicondyle & adjacent ulna I: Pisiform, hamate, base of 5th metacarpal

Front 27

Muscles that cross the wrist and move the hand Extensor Carpi Radialis Longus

Back 27

O: Lateral epicondyle I: Base of 2nd metacarpal

Front 28

Muscles that cross the wrist and move the hand Extensor Carpi Radialis Brevis

Back 28

O: Lateral epicondyle I: Base of 3rd metacarpal

Front 29

Muscles that cross the wrist and move the hand Extensor Carpi Ulnaris

Back 29

O: Lateral epicondyle, posterior ulna I: Base of 5th metacarpal

Front 30

Muscles that cross the wrist and move the hand Flexor Digitorum Superficialis

Back 30

O: Medial epicondyle, coronoid process I: Middle phalanges of last 4 digits

Front 31

Muscles that cross the wrist and move the hand Extensor Digitorum

Back 31

O: Lateral epicondyle I: Middle and distal phalanges of last 4 digits

Front 32

Muscles that move the trunk Erector Spinae

Back 32

O: Lumbar fascia, iliac crest, lumbar, thoracic, and lower cervical vertebrae, angle of ribs I: Posterior surfaces of thoracic and cervical vertebrae, mastoid process of skull, angles of ribs

Front 33

Muscles that move the trunk Quadratus Lumborum

Back 33

O: Iliac crest, transverse process of lower 4 lumbar vertebrae I: 12th rib, transverse process of upper 2 lumbar vertebrae

Front 34

Muscles that move the trunk Rectus Abdominis

Back 34

O: Pubic crest I: Costal cartilage of ribs 5,6, 7

Front 35

Muscles that move the trunk External Oblique

Back 35

O: Iliac crest, linea alba I: Side of chest, lower 8 ribs

Front 36

Muscles that move the trunk Internal Oblique

Back 36

O: Iliac crest, inguinal ligament, lumbar fascia I: Linea alba, cartilage of lower 3 ribs

Front 37

Mucles that cross the hip joint and move the thigh (femur) Iliopsoas

Back 37

O: Bodies and discs of 12th thoracic and all lumbar vertebrae, inner ilium I: Lesser trochanter

Front 38

Mucles that cross the hip joint and move the thigh (femur) Pectineus

Back 38

O: Superior ramus of pubis I: Pectineal line of femur

Front 39

Mucles that cross the hip joint and move the thigh (femur) Sartorius

Back 39

O: Anterior superior iliac spine I: Anterior, medial tibia

Front 40

Mucles that cross the hip joint and move the thigh (femur) Tensor Faciae Latae

Back 40

O: Iliac Crest I: Illiotibial band of tibia

Front 41

Mucles that cross the hip joint and move the thigh (femur) Rectus Femoris

Back 41

O: Anterior superior iliac spine I: Patella, tibial tuberosity via patella ligament

Front 42

Mucles that cross the hip joint and move the thigh (femur) Gluteus Medius

Back 42

O: Outer ilium I: Greater trochanter

Front 43

Mucles that cross the hip joint and move the thigh (femur) Gluteus Minimus

Back 43

O: Lateral surface of ilium I: Greater trochanter

Front 44

Mucles that cross the hip joint and move the thigh (femur) Gluteus Maximus

Back 44

O: Side of coccyx, sacrum, iliac crest I: Gluteal line (lateral linea aspera)

Front 45

Mucles that cross the hip joint and move the thigh (femur) Biceps Femoris

Back 45

O: Ischial tuberosity, lower linea aspera I: Head of fibula, head of tibia

Front 46

Mucles that cross the hip joint and move the thigh (femur) Semitendonosus

Back 46

O: Ischial tuberosity I: Anterior, medial tibia

Front 47

Mucles that cross the hip joint and move the thigh (femur) Semimembranous

Back 47

O: Ischial tuberosity I: Medial head of tibia

Front 48

Mucles that cross the hip joint and move the thigh (femur) Adductor Brevis

Back 48

O: Inferior ramus of pubis I: Upper linea aspera

Front 49

Mucles that cross the hip joint and move the thigh (femur) Adductor Magnus

Back 49

O: Inferior ramus of ischium and pubis, ischial tuberosity I: Linea aspera, medial epicondyle

Front 50

Mucles that cross the hip joint and move the thigh (femur) Adductor Longus

Back 50

O: Inferior ramus of pubis I: Middle 1/3 of linea aspera

Front 51

Mucles that cross the hip joint and move the thigh (femur) Gracilis

Back 51

O: Inferior ramus of pubis I: Medial, upper tibia

Front 52

Mucles that cross the hip joint and move the thigh (femur) Piriformis

Back 52

O: Anterolateral sacrum I: Greater trochanter

Front 53

Mucles that cross the hip joint and move the thigh (femur) Internal Obturator

Back 53

O: Surface around obturator foramen I: Greater trochanter

Front 54

Mucles that cross the hip joint and move the thigh (femur) External Obturator

Back 54

O: Surface around obturator foramen I: Trochanteric Fossa

Front 55

Muscles that cross the knee joint and move the leg Biceps Femoris

Back 55

O: Ischial tuberosity, lower linea aspera I: Head of fibula, head of tibia

Front 56

Muscles that cross the knee joint and move the leg Semitendonosus

Back 56

O: Ischial tuberosity I: Anterior, medial tibia

Front 57

Muscles that cross the knee joint and move the leg Semimembranous

Back 57

O: Ischial tuberosity I: Medial head of tibia

Front 58

Muscles that cross the knee joint and move the leg Rectus Femoris

Back 58

O: Anterior superior iliac spine I: Patella, tibial tuberosity via patella ligament

Front 59

Muscles that cross the knee joint and move the leg Vastus Lateralis

Back 59

O: Intertrochanteric line, upper 1/2 of linea aspera I: Lateral patella, tibial tuberosity via patella ligament

Front 60

Muscles that cross the knee joint and move the leg Vastus Intermedius

Back 60

O: Upper 2/3 of femur I: Top of patella, tibial tuberosity via patella ligament

Front 61

Muscles that cross the knee joint and move the leg Vastus Medialis

Back 61

O: Intertrochanteric line, linea aspera I: Medial patella, tibial tuberosity via patella ligament

Front 62

Muscles that cross the knee joint and move the leg Gastrocnemius

Back 62

O: Above lateral and medial codyle of femur (2 heads) I: Posterior calcaneus via calcaneal tendon

Front 63

Muscles that cross the ankle and move the foot Gastrocnemius

Back 63

O: Above lateral and medial codyle of femur (2 heads) I: Posterior calcaneus via calcaneal tendon

Front 64

Muscles that cross the ankle and move the foot Soleus

Back 64

O: Upper 2/3 of fibula, posterior tibia I: Posterior calcaneus

Front 65

Muscles that cross the ankle and move the foot Plantaris

Back 65

O: Lateral supracondylar ridge I: Posterior calcaneus

Front 66

Muscles that cross the ankle and move the foot Tibialis Posterior

Back 66

O: Upper 2/3 of tibia, upper 2/3 of fibula, interosseus membrane I: Many attachments to underside of tarsals and metatarsals

Front 67

Muscles that cross the ankle and move the foot Tibialis Anterior

Back 67

O: Lateral head and upper 2/3 of tibia I: Base of 1st metatarsal and 1st cuneiform

Front 68

Muscles that cross the ankle and move the foot Fibularis (Peroneus) Longus

Back 68

O: Fibula head and shaft I: Base of 1st metatarsal and 1st cuneiform (passes under foot)

Front 69

Muscles that cross the ankle and move the foot Fibularis (Peroneus) Brevis

Back 69

O: Lower 2/3 of fibula I: Base of 5th metatarsal

Front 70

Muscles that cross the ankle and move the foot Flexor Digitorum Longus

Back 70

O: Middle posterior tibia I: Distal phalanges of last 4 digits

Front 71

Muscles that cross the ankle and move the foot Flexor Hallucis Longus

Back 71

O: Lower 2/3 of fibula I: Distal phalange of big toe

Front 72

Muscles that cross the ankle and move the foot Extensor Digitorum Longus

Back 72

O: Head of tibia, upper 3/4 fibula I: Medial and distal phalanges of last 4 digits

Front 73

Muscles that cross the ankle and move the foot Extensor Hallucis Longus

Back 73

O: Middle 1/2 of fibula I: Distal phalange of big toe