Second Order Unit 2

Front 1

Pectoralis Major
Origin

Back 1

ventral part of the sternum to the 7th rib, sternal half of the clavicle, cartilage of true ribs, aponeurosis of the external oblique muscles

Front 2

Pectoralis Major
Insertion

Back 2

lateral lip of the intertubercular groove of the humerus

Front 3

Pectoralis Major
Action

Back 3

adducts and medially rotates the arm; clavicular head: flexes the humerus; sternal head: extends the humerus

Front 4

Pectoralis Major
Innervation

Back 4

lateral and medial pectoral nerves

Front 5

Corachobrachialis
Origin

Back 5

tip of the coracoid process of the scapula

Front 6

Corachobrachialis
Insertion

Back 6

anteromedial surface of the middle of the humerus shaft opposite the deltoid tuberosity

Front 7

Coracobrachialis
action

Back 7

FLEXES AND ADDUCTS the humerus

Front 8

coracobrachilais
innervation

Back 8

musculocutaneous nerve

Front 9

brachialais
origin

Back 9

anterior surface of the distal half of the humerus

Front 10

brachialis
insertion

Back 10

coronoid process and the tuberosity of the tibia

Front 11

brachilais
action

Back 11

flexes the forearm

Front 12

brachilais
innervation

Back 12

musculocutaneous and radial nerves

Front 13

pronator teres
origin

Back 13

just above the medial epicondyle of the humerus; medial surface of the coronoid process of the ulna

Front 14

pronator teres
insertion

Back 14

lateral surfce of the middle of the radius

Front 15

pronator teres
action

Back 15

pronation of the forearm, assists in flexion of the elbow

Front 16

pronator teres
innervation

Back 16

median nerve

Front 17

pronator quadratus
origin

Back 17

anterior surface of the medial side of the distal 1/4 of the ulna

Front 18

pronator quadratus
insertion

Back 18

medial side of the distal 1/4 of the radius

Front 19

pronator quadratus
action

Back 19

pronation of the forearm

Front 20

pronator quadratus
innervation

Back 20

median nerve

Front 21

abductor digiti minimi
origin

Back 21

pisiform bone and tendon of flexor carpi ulnaris

Front 22

abductor digiti minimi
insertion

Back 22

medial side of the base of the proximal phalanx of the 5th digit

Front 23

abductor digiti minimi
action

Back 23

abducts the 5th digit

Front 24

abductor digiti minimi
innervation

Back 24

ulnar nerve

Front 25

opponens pollicis
origin

Back 25

trapezium and retinaculum

Front 26

opponens pollicis
insertion

Back 26

anterior side of the lateral surface of the first metacarpal bone of the thumb

Front 27

opponens pollicis
action

Back 27

rotates the thumb into opposition with the fingers

Front 28

opponens pollicis
innervation

Back 28

median nerve

Front 29

triceps brachii
origin

Back 29

long head-- infraglenoid tubercle of the scapula; medial head-- distal 2/3s of the medial and posterior surface of the humerus; lateral head-- upper half of the posterior surface of the humerus

Front 30

triceps brachii
insertion

Back 30

posterior surface of the olecranon process of the ulna

Front 31

triceps brachii
action

Back 31

extends the forearm

Front 32

triceps brachii
innervation

Back 32

radial nerve

Front 33

brachioradialis
origin

Back 33

proximal 2/3s of the lateral supracondylar ridge of the humerus

Front 34

brachioradialis
insertion

Back 34

lateral surface of the base of the styloid process of the radius

Front 35

brachioradialis
action

Back 35

FLEXES the forearm, assists in PRONATION AND SUPINATION

Front 36

brachioradialis
innervation

Back 36

radial nerve

Front 37

flexor digitorum superficialis
insertion

Back 37

each tendon divides into 2 splits that insert on the sides of the middle phalanges of the 2nd-5th fingers

Front 38

flexor digitorum superficialis
action

Back 38

flex the digits at middle phalanges (proximal interphalangeal joint or metacarpophalangeal joint?)

Front 39

flexor digitorum superficialis
innervation

Back 39

median nerve

Front 40

flexor digitorum profundas insertion

Back 40

tendons insert into the anterior surface of the distal phalanges of the 2nd-5th fingers

Front 41

flexor digitorum profundus
action

Back 41

flex digits at distal interphalangeal joints

Front 42

flexor digitorum profundus
innervation

Back 42

ulnar and median nerve

Front 43

pectoralis minor

Back 43

-draws the scapula forward and downward, draws the ribs superiorly
-medial pectoral nerve

Front 44

subclavius

Back 44

-depresses the clavicle, draws the shoulder forward and downward
-c5, c6

Front 45

biceps brachii

Back 45

-flexes and supinates the forearm
-musculocutaneous nerve

Front 46

flexor carpi ulnaris

Back 46

-flex and adduct the wrist
-ulnar nerve

Front 47

flexor carpi radialis

Back 47

-flex and abduct the wrist
-median nerve

Front 48

palmaris longus

Back 48

-tenses the palmar fasica, flexes the wrist
-median nerve

Front 49

flexor pollicis longus

Back 49

-flexes the thumb
-median nerve

Front 50

abductor pollicis brevis

Back 50

-abduct, aid opposition
-median nerve

Front 51

flexor pollicis brevis

Back 51

-flex the thumb at proximal phalanx, aid opposition
-median nerve

Front 52

flexor digiti minimi brevis

Back 52

-flex the 5th digit at metacarpophalangeal joint
-ulnar nerve

Front 53

opponens digiti minimi

Back 53

-rotates the 5th digit into opposition with the thumb
-ulnar nerve

Front 54

adductor pollicis

Back 54

-adducts and flexes the thumb
-ulnar nerve

Front 55

lumbricales

Back 55

-extend fingers at interphalangeal joints
-median and ulnar nerves

Front 56

interosseous mm

Back 56

-palmar: adduct
-dorsal: abduct
-deep branch of ulnar nerve

Front 57

abductor pollicis longus

Back 57

-abducts and extends the first digit, abducts wrist
-radial nerve

Front 58

extensor pollicis longus

Back 58

-extends thumb at interphalangeal joint and metacarpophalangeal joints
-radial nerve

Front 59

extensor pollicis brevis

Back 59

-extends at proximal phalanx, abducts
-radial nerve

Front 60

extensor indicis

Back 60

-extends indicis at metacarpalphalanx joint
-radial nerve

Front 61

supinator

Back 61

-supination of the forearm
-radial nerve

Front 62

extensor carpi radialis longus

Back 62

-extend wrist, abduct hand
-radial nerve

Front 63

extensor carpi radialis brevis

Back 63

-extends wrist, abduct hand
-radial nerve

Front 64

extensor digitorum

Back 64

-extends fingers and wrist
-radial nerve

Front 65

extensor digiti minimi

Back 65

-extends 5th digit
-radial nerve

Front 66

extensor carpi ulnaris

Back 66

-extends wrist, adduct of hand
-radial nerve

Front 67

anconeus

Back 67

-extends forearm, stabilizes elbow joint
-radial nerve