Anatomy Exam 3

Front 1

Deltoid

Back 1

O: lateral 1/3 clavicle, acromion, spine of scapula
I: deltoid tuberosity of humerus
F:
clavicular (anterior) part- flexes and medially rotates arm
acromial (middle) part- abducts arm
spinal (posterior) part- extends and laterally rotates arm
N: Axillary n. (C5*, 6)

Front 2

Supraspinatus

Back 2

O: supraspinatus fossa of scapula
I: superior facet of greater tubercle of humerus
F: initiates and assists deltoid in abduction of arm
N: Suprascapular n. (C4, 5*, 6)

Front 3

Infraspinatus

Back 3

O: infraspinous fossa of scapula
I: middle facet of greater tubercle of humerus
F: laterally rotates arm
N: Suprascapular n. (C5*, 6)

Front 4

Teres minor

Back 4

O: middle part of lateral border of scapula
I: inferior facet of greater tubercle of humerus
F: laterally rotates arm
N: Axillary n. (C5*, 6)

Front 5

Teres major

Back 5

O: posterior surface of inferior angle of scapula
I: medial lip of intertubercular sulcus of humerus
F: adducts and medially rotates arm
N: Lower Subscapular n. (C5, 6*)

Front 6

Subscapularis

Back 6

O: subscapular fossa (most of anterior surface of scapula)
I: lesser tubercle of humerus
F: medially rotates arm
N: Upper and Lower Subscapular n. (C5, 6*, 7)

Front 7

Rotator Cuff Muscles (SITS)

Back 7

helps hold head of humerus in glenoid cavity

Front 8

Brachioradialis

Back 8

O: lateral supracondylar ridge of humerus
I: lateral surface of distal radius
F: flexes forearm
N: Radial n. (C5-T1)

Front 9

Extensor carpi radialis longus

Back 9

O: lateral supracondylar ridge and lateral epicondyle of humerus (common extensor tendon)
I: base of 2nd metacarpal
F: extend and abduct hand
N: Radial n. (C5-T1)

Front 10

Extensor carpi radialis brevis

Back 10

O: common extensor tendon
I: base of 3rd metacarpal
F: extend hand
N: Deep radial n. (C5-T1)

Front 11

Extensor digitorum

Back 11

O: common extensor tendon
I: extensor expansion of 2nd-5th digits
F: extend fingers and hands
N: Deep radial n. (C5-T1)

Front 12

Extensor digiti minimi

Back 12

O: common extensor tendon
I: extensor expansion of 5th digit
F: extend 5th digit
N: Deep radial n. (C5-T1)

Front 13

Extensor carpi ulnaris

Back 13

O: common extensor tendon
I: base of 5th metacarpal
F: extend and adduct hand
N: Deep radial n. (C5-T1)

Front 14

Supinator

Back 14

O: lateral epicondyle of the humerus, supinator fossa and crest of ulna
I: lateral, posterior, and anterior surface of proximal 1/3 of radius
F: supinate forearm
N: Deep radial n. (C5-T1)

Front 15

Abductor pollicis longus

Back 15

O: proximal radius and ulna, interosseous membrane
I: base of 1st metacarpal thumb at CMP joint
F: abduct and extend
N: posterior interosseous n. (C5-T1)

Front 16

Extensor pollicis brevis

Back 16

O: distal 1/3rd of radius, interosseous membrane
I: base of proximal phalanx of thumb
F: extend thumb at MCP joint
N: posterior interosseous n. (C5-T1)

Front 17

Extensor pollicis longus

Back 17

O: middle 1/3rd of ulna, interosseous membrane
I: base of distal phalanx of thumb
F: extend thumb at MCP and IP joints
N: posterior interosseous n. (C5-T1)

Front 18

Extensor indicis

Back 18

O: distal 1/3rd of ulna, interosseous membrane
I: extensor expansion of index finger
F: extend index finger
N: posterior interosseous n. (C5-T1)

Front 19

Biceps brachii

Back 19

O:
Long head- supraglenoid tubercle
Short head- coracoid process
I: radial tuberosity and bicipital aponeurosis
F: flex FA/arm; supinate hand
N: Musculocutaneous, C5, 6, 7

Front 20

Coracobrachialis

Back 20

O: coracoid process
I: middle 1/3 humerus
F: flex and adduct arm
N: Musculocutaneous, C5, 6, 7

Front 21

Brachialis

Back 21

O: distal 2/3 humerus
I: coronoid process and tuberosity of ulna
F: flex FA
N: Musculocutaneous, C5, 6, 7

Front 22

Triceps Brachii

Back 22

O:
Long head- infraglenoid tubercle
Lateral head- posterior and lateral
Medial head- posterior surface of distal 1/2 humerus
I: olecranon
F: extend FA; aid in extension and adduction of arm
N: Radial N.; C5, 6, 7, 8, T1

Front 23

palmaris longus

Back 23

O: humerus (common flexor tendon)
I: flexor retinaculum and palmar aponeurosis
F: flexes hand; tightens palmar aponeurosis
N: median N. (C5,6,7,8, T1)

Front 24

pronator teres

Back 24

O: humeral head and ulnar head
I: middle of lateral surface of radius
F: pronates hand and flexes FA
N: Median N. (C5, 6, 7, 8, T1)

Front 25

flexor carpi radialis

Back 25

O: humerus (common flexor tendon)
I: 2nd MCP
F: flexes hand; abducts hand
N: Median N. (C5, 6, 7, 8, T1)

Front 26

flexor carpi ulnaris

Back 26

O: humeral head; ulnar head
I: pisiform, hook of hamate, 5th MCP
F: flexes hand; adducts hand
N: Ulnar N. (C8, T1)

Front 27

flexor digitorum superficialis

Back 27

O: humeroulnar head (common flexor tendon)& ulna; radial head
I: sides of middle phalanges of digits 2-5
F: flexes middle phalanges of digits 2-5
N: Median N. (C5, 6, 7, 8, T1)

Front 28

flexor digitorum profundus

Back 28

O: ulna
I: bases of distal phalanges of digits 2-5
F: flexes distal phalanges of digits 2-5
N: medial half- ulnar N.
lateral half- anterior interoseous (branch of median N.)

Front 29

flexor pollicis longus

Back 29

O: radius
I: base of distal phalanx of thumb
F: flexes distal thumb
N: anterior interosseous (branch of median N.)

Front 30

pronator quadratus

Back 30

O: distal anterior surface of ulna
I: distal anterior surface of radius
F: pronates hand
N: anterior interosseous (branch of Median N.)

Front 31

palmaris longus

Back 31

O: humerus (common flexor tendon)
I: flexor retinaculum and palmar aponeurosis
F: flexes hand; tightens palmar aponeurosis
N: median N. (C5,6,7,8, T1)

Front 32

pronator teres

Back 32

O: humeral head and ulnar head
I: middle of lateral surface of radius
F: pronates hand and flexes FA
N: Median N. (C5, 6, 7, 8, T1)

Front 33

flexor carpi radialis

Back 33

O: humerus (common flexor tendon)
I: 2nd MCP
F: flexes hand; abducts hand
N: Median N. (C5, 6, 7, 8, T1)

Front 34

flexor carpi ulnaris

Back 34

O: humeral head; ulnar head
I: pisiform, hook of hamate, 5th MCP
F: flexes hand; adducts hand
N: Ulnar N. (C8, T1)

Front 35

flexor digitorum superficialis

Back 35

O: humeroulnar head (common flexor tendon)& ulna; radial head
I: sides of middle phalanges of digits 2-5
F: flexes middle phalanges of digits 2-5
N: Median N. (C5, 6, 7, 8, T1)

Front 36

flexor digitorum profundus

Back 36

O: ulna
I: bases of distal phalanges of digits 2-5
F: flexes distal phalanges of digits 2-5
N: medial half- ulnar N.
lateral half- anterior interoseous (branch of median N.)

Front 37

flexor pollicis longus

Back 37

O: radius
I: base of distal phalanx of thumb
F: flexes distal thumb
N: anterior interosseous (branch of median N.)

Front 38

pronator quadratus

Back 38

O: distal anterior surface of ulna
I: distal anterior surface of radius
F: pronates hand
N: anterior interosseous (branch of Median N.)

Front 39

abductor pollicis brevis (F and N)

Back 39

F: abducts thumb, assists flexion of proximal phalanx
N: median n. (recurrent br.)

Front 40

flexor pollicis brevis (F and N)

Back 40

F: flexes thumb, assists opposition
N: median n. (recurrent br.)

Front 41

opponens pollicis (F and N)

Back 41

F: draws 1st MCP towards center of palm
N: median n. (recurrent br.)

Front 42

abductor digiti minimi (F and N)

Back 42

F: abducts 5th digit
N: deep br. of ulnar n.

Front 43

flexor digiti minimi (F and N)

Back 43

F: flexes proximal phalanx of 5th digit
N: deep br. of ulnar n.

Front 44

opponens digiti minimi (F and N)

Back 44

F: draws 5th MCP forward in cupping hand
N: deep br. of ulnar n.

Front 45

palmaris brevis (F and N)

Back 45

F: wrinkles skin of palm
N: ulnar n.

Front 46

lumbricals

Back 46

O: tendons of FDP
-1, 2: lateral side
-3, 4: bipennate, from both sides
I: extensor expansion distal to MCP-P joint on radial side of digits 2-5
F: flex MCP-P joints, extend IP joints
N: lateral- median n.; medial: ulnar n.

Front 47

adductor pollicis

Back 47

O: oblique head- capitate and bases of MCP 2-3
transverse head- anterior surface of MCP 3
I: medial side of base of proximal phalanx of thumb
F: adducts thumb; assist opposition
N: deep br. of ulnar n.

Front 48

palmar interosseous

Back 48

O: medial side of MCP 2; lateral sides of MCP 4-5
I: base of proximal phalanx in line w/its origin
F: adducts digits 2, 4, 5; aids extension of IP joints and flexes MCP-P joints
N: deep br. of ulnar n.

Front 49

dorsal interosseous

Back 49

O: 2 heads from adjacent sides of MCP 1-5
I: extensor expansion and base of proximal phalanges (lateral side of 2-3; medial side of 3-4)
F: abduct digits 2, 3, 4; aid extension of IP joints and flexion of MCP-P joints
N: deep br. of ulnar n.