Myology: Deep Thorax, Deep Dorsal And Ventral Upper Limb, Thorax

Front 1

Splenius: Action

Back 1

Extends/hyperextends head

Front 2

Splenius: Origin

Back 2

(Occipital and spines C7-T6)

Front 3

Splenius: Insertion

Back 3

(Temporal, occipital, C2-4)

Front 4

Iliocostalis: Action

Back 4

Extends vertebral column

Front 5

Iliocoastalis: Origin

Back 5

Ribs 3-12

Front 6

Iliocostalis: Insertion

Back 6

Angles of ribs, transverse processes C(4-6)

Front 7

Semispinalis: Action

Back 7

Extends vertebral column and head

Front 8

Semispinalis: Origin

Back 8

Transverse processes C7-T12

Front 9

Semispinalis: Insertion

Back 9

Occipital bone, cervical spines (and T1-T4 spines)

Front 10

External intercostals: Action

Back 10

Elevates rib cage

Front 11

External intercostals: Origin

Back 11

Inferior border of rib above

Front 12

External intercostals: Insertion

Back 12

Superior border of rib below

Front 13

Internal intercostals: Action

Back 13

Depresses rib cage

Front 14

Internal intercostals: Origin

Back 14

Superior border of rib below

Front 15

Internal intercostals: Insertion

Back 15

Costal groove of rib above

Front 16

Diaphragm: Action

Back 16

Increases intra-abdominal pressure

Front 17

Diaphragm: Origin

Back 17

Inferior, internal rib cage and sternum; costal cartilages of last (6) ribs; lumbar vertebrae

Front 18

Diaphragm: Insertion

Back 18

Central tendon

Front 19

Rectus Abdominis: Action

Back 19

Flexes and rotates (lumbar) vertebral column

Front 20

Rectus Abdominis: Origin

Back 20

Pubic crest

Front 21

Rectus Abdominis: Insertion

Back 21

Xiphoid process; costal cartilages (5-7)

Front 22

Coccygeus: Action

Back 22

Supports pelvic viscera

Front 23

Coccygeus: Origin

Back 23

Ischial spine

Front 24

Coccygeus: Insertion

Back 24

Sacrum and coccyx

Front 25

Sphincter Urethrae: Action

Back 25

Constricts urethra

Front 26

Sphincter Urethrae: Origin

Back 26

(Ischiopubic rami)

Front 27

Sphincter Urethrae: Insertion

Back 27

(Midline raphe)

Front 28

Ischiocavernosus: Action

Back 28

Maintains erection

Front 29

Ischiocavernosus: Origin

Back 29

Ischial tuberosities

Front 30

Ischiocavernosus: Insertion

Back 30

(Crus of) corpus cavernosa of penis/clitoris

Front 31

Serratus ventralis: Action

Back 31

Holds scapula to chest wall

Front 32

Serratus ventralis: Origin

Back 32

Ribs (1-8)

Front 33

Serratus ventralis: Insertion

Back 33

Anteromedial scapula

Front 34

Subscapularis: Part of

Back 34

Rotator cuff

Front 35

Subscapularis: Action

Back 35

Medially rotates humerus

Front 36

Supscapularis: Origin

Back 36

Subscapular fossa of scapula

Front 37

Subscapularis: Insertion

Back 37

Lesser tubercle of humerus

Front 38

Supraspinatus: Part of

Back 38

Rotator cuff

Front 39

Supraspinatus: Action

Back 39

Stabilizes shoulder joint

Front 40

Supraspinatus: Origin

Back 40

Supraspinous fossa of scapula

Front 41

Supraspinatus: Insertion

Back 41

Greater tubercle of humerus

Front 42

Infraspinatus: Part of

Back 42

Rotator cuff

Front 43

Infraspinatus: Action

Back 43

Stabilizes shoulder joint; laterally rotates humerus

Front 44

Infraspinatus: Origin

Back 44

Infraspinous fossa of scapula

Front 45

Infraspinatus: Insertion

Back 45

Greater tubercle of humerus

Front 46

Teres Minor: Part of

Back 46

Rotator cuff

Front 47

Teres Minor: Action

Back 47

Stabilizes shoulder joint; laterally rotates humerus

Front 48

Teres Minor: Origin

Back 48

(Lateral border of) scapula

Front 49

Teres Minor: Insertion

Back 49

Greater tubercle of humerus

Front 50

Teres Major: Action

Back 50

Extends, medially rotates, adducts humerus

Front 51

Teres Major: Origin

Back 51

(Inferior angle of) scapula

Front 52

Teres Major: Insertion

Back 52

Intertubercular groove of humerus

Front 53

Coracobrachialis: Action

Back 53

Flexes, adducts humerus

Front 54

Corachobrachialis: Origin

Back 54

Coracoid process of scapula

Front 55

Corachobrachialis: Insertion

Back 55

(Medial surface of) humerus

Front 56

Triceps brachi, medial head: Action

Back 56

Extends forearm

Front 57

Triceps brachi, medial head: Origin

Back 57

Posterior humerus(distal to radial groove)

Front 58

Triceps brachi, medial head: Insertion

Back 58

Olecranon process of ulna

Front 59

Biceps brachii, long head: Action

Back 59

Flexes elbow, supinates forearm

Front 60

Biceps brachii, long head: Origin

Back 60

(Lip of) glenoid cavity

Front 61

Biceps brachii, long head: Insertion

Back 61

Radial tuberosity

Front 62

Biceps brachii, short head: Action

Back 62

Flexes elbow, supinates forearm

Front 63

Biceps brachii, short head: Origin

Back 63

Coracoid process of scapula

Front 64

Biceps brachii, short head: Insertion

Back 64

Radial tuberosity

Front 65

Brachialis: Action

Back 65

Flexes forearm

Front 66

Brachialis: Origin

Back 66

(Anterior distal) humerus

Front 67

Brachialis: Insertion

Back 67

Coranoid process of ulna

Front 68

Flexor digitorum profundus: Action

Back 68

Flexes fingers

Front 69

Flexor digitorum profundus: Origin

Back 69

Common flexor tendon

Front 70

Flexor digitorum profundus: Insertion

Back 70

Distal phalanges 2-5

Front 71

Supinator: Action

Back 71

Supinates forearm

Front 72

Supinator: Origin

Back 72

Lateral epicondyle of humerus

Front 73

Supinator: Insertion

Back 73

Proximal radius

Front 74

Scalenes: Action

Back 74

Flexes, rotates neck

Front 75

Scalenes: Origin

Back 75

Transverse process C(1-7)

Front 76

Scalenes: Insertion

Back 76

Anterolateral ribs (1 and 2)

Front 77

Rhomboideus: Action

Back 77

Retracts scapula

Front 78

Rhomboideus: Origin

Back 78

(Spines C7-T5)

Front 79

Rhomboideus: Insertion

Back 79

Medial border of scapula