Upper Extremity Anatomy

Front 1

upper trapezius

Back 1

0) mid sup nuchal line,
ext occipital protuberance,
lig nuchae,
C7 sp

I) lat 1/3 clavicle and acromion process

Front 2

middle trapezius

Back 2

o) sp T1-5

i) lat 1/2 spine of scapula

Front 3

lower trapezius

Back 3

o) sp T6-12

i) med 1/2 spine of scapula

Front 4

Latissimus Dorsi

Back 4

o) sp of T6-12,
thoracolumbar fascia,
post iliac crest,
inf 3 or 4 ribs

i) floor intertubercular groove of humerus

Front 5

Pectoralis Major

clavicular head

Back 5

o) Ant surface of the medial 1/2 of clavicle

i) lat lip of intertubercular groove of humerus

Front 6

Pectoralis Major

sternal head

Back 6

o) ant surf of sternum,
1-6 costal cartilages

i) lat lip of intertubercular groove of humerus

Front 7

Pectoralis Minor

Back 7

o) Ribs 3-5 near costal cartilages

i) coracoid process of scapula

Front 8

Subclavius

Back 8

o) 1st rib at the junction of costal cartilage

i) inf surf of middle 1/3 of clavicle

Front 9

Serratus Anterior

Back 9

o) ext surfaces of lat parts of upper 8 ribs

i) ant surf of med border of scapula

Front 10

Deltoid

Back 10

o) A: lat 1/3 of clavicle
M: acromion
P: spine of scapula

i) deltoid tuberosity of humerus

Front 11

Supraspinatus

Back 11

o) supraspinous fossa of scapula

i) sup facet on greater tubercle of humerus

Front 12

Infraspinatus

Back 12

o) infraspinous fossa of scapula

i) middle facet on greater tubercle of humerus

Front 13

Teres Minor

Back 13

o) sup part of lat border of scapula

i) inf facet on greater tubercle

Front 14

Teres Major

Back 14

o) Dorsal surface of inf angle of scapula

i) med lip of intertubercular groove of humerus

Front 15

Subscapularis

Back 15

o) subscapular fossa of scapula (anterior)

i) lesser tubercle of humerus

Front 16

levator scapulae

Back 16

o) post tubercle of tp of C1-4

i) sup angle,
sup part of med border of scapula

Front 17

Rhomboid Minor

Back 17

o) sp C7 and T1

i) med border of scapula above spine

Front 18

Rhomboid Major

Back 18

o) sp T2-5

i) med border of scapula below spine

Front 19

Biceps Brachii

long head

Back 19

o) supraglenoid tubercle of scapula

i) radial tuberosity of radius

Front 20

Biceps Brachii

short head

Back 20

o) tip of coracoid pr of scapula

i) radial tuberosity of radius

Front 21

Brachialis

Back 21

o) distal 1/2 of ant surf of humerus

i) coronoid pr and tuberosity of ulna

Front 22

Coracobrachialis

Back 22

o) tip of coracoid pr of scapula

i) middle 1/3 of med surf of humerus

Front 23

Pronator Teres

humeral head
ulnar head

Back 23

o) H: medial epicondyle of humerus
U: coronoid pr of ulna

i) mid lat surf of radius

Front 24

Flexor Carpi Radialis

Back 24

o) med epicondyle of humerus

i) base of 2nd MC (ant)

Front 25

Palmaris Longus

Back 25

o) med epicondyle of humerus

i) flexor retinaculum and palmar aponeurosis

Front 26

Flexor Carpi Ulnaris

Back 26

o) med epicondyle of humerus, olecranon and post ulna

i) pisiform,
hook of hamate,
5th MC

Front 27

Flexor Digitorum Superficialis

Back 27

o) med epicondyle of humerus,
ulnar collateral lig,
coronoid pr of ulna,
sup 1/2 of ant surf of radius

i) middle phalanges of medial 4 digits

Front 28

Flexor Digitorum Profundus

Back 28

o) proximal 3/4 of medial and ant surf of ulna,
interosseus membrane

i) bases of distal phalanges of med 4 digits (via FDS hiatus)

Front 29

Flexor Pollicis Longus

Back 29

o) Ant surf of radius,
interosseus membrane

i) base of distal phalanx of thumb

Front 30

Pronator Quadratus

Back 30

o) distal fourth of ant surf of ulna

i) distal fourth of ant surf of radius

Front 31

Brachioradialis

Back 31

o) proximal lat supracondylar ridge of humerus

i) radial styloid process

Front 32

Ext Carpi Radialis Longus

Back 32

o) Lat supracondylar ridge of humerus

i) base of 2nd MC

Front 33

Ext Carpi Radialis Brevis

Back 33

o) Lat epicondyle of humerus

i) base of 3rd MC

Front 34

Ext Digitorum

Back 34

o) Lat epicondyle of humerus

i) Extensor Expansions of med 4 digits

Front 35

Ext Digitorum minimi

Back 35

o) Arises from the ext. digitorum

i) Ext expansion of 5th digit

Front 36

Extensor Carpi Ulnaris

Back 36

o) Lat epicondyle of humerus,
post border of ulna

i) base of 5th MC

Front 37

Supinator

Back 37

o) Lat epicondyle of humerus,
ulna: supinator fossa,
crest of ulnar collateral lig,
annular lig

i) lat post & ant surf's of proximal radius

Front 38

Abductor Pollicis Longus

Back 38

o) post surf of radius and ulna,
interosseus membrane

i) base of 1st MC

Front 39

Ext Pollicis Brevis

Back 39

o) post surf of radius,
interosseus membrane

i) base of proximal phalanx of thumb

Front 40

Ext Pollicis Longus

Back 40

o) post surf of middle of ulna,
interosseus membrane

i) base of distal phalanx of thumb

Front 41

Extensor Indices

Back 41

o) post surf of ulna,
interosseus membrane

i) extensor expansion of 2nd digit

Front 42

Abductor Pollicis Brevis

Back 42

o) tubercles of scaphoid and trapezium,
flexor retinaculum

i) lat side of base of proximal phalanx of thumb

Front 43

Opponens Pollicis

Back 43

o) tubercles of scaphoid and trapezium,
flexor retinaculum

i) lat side of 1st MC

Front 44

Flexor Pollicis Brevis

deep head?

Back 44

o) Tubercles of scaphoid and trapezium,
flexor retinaculum

i) lat side of base of proximal phalanx of thumb

Front 45

Abductor Digiti Minimi

Back 45

o) pisiform

i) base of 5th proximal phalanx on med side

Front 46

Flexor Digiti Minimi Brevis

Back 46

o) hook of hamate,
flexor retinaculum

i) base of 5th proximal phalanx on med side

Front 47

Opponens Digiti Minimi

Back 47

o) Hook of Hamate,
flexor retinaculum

i) med border of 5th MC

Front 48

Lumbricals

Back 48

o) lat 2 and med 3 tendons of FDP

i) lat side of extensor expansions of digits 2-5

Front 49

Adductor Pollicis

oblique head
Transverse head

Back 49

o) O: bases of MC 2 and 3,
capitate (and adj. carpals)
T: 3rd MC

i) med base of proximal phalanx of thumb

Front 50

Dorsal Interossei

Back 50

o) adjacent sides of 2 MCs

i) extensor expansions and bases of proximal phalanges of digits 2-4

Front 51

Palmar Interossei

Back 51

o) palmar surf's of MCs 2,4,5

i) extensor expansions and bases of proximal phalanges of digits 2,4,5