Shoulder, Arm, and Hand

Question 1

Deltoid

Answer 1

O: clavicle, acromion, and spine of scapula
I: tuberosity of humerus
N: axillary nerve (C5-C6)
A: flexs/IR, abduction, and extends/ER arm

Question 2

Subscapularis

Answer 2

O: subscapular fossa (anterior side of scapula)
I: lesser tubercle of humerus
N: subscapular (C5-7)
A: adducts/IR arm

Question 3

Supraspinatus

Answer 3

O: supraspinous fossa of scapula
I: superior facet of greater tubercle of humerus
N: suprascapular (C5-7)
A: initial abduction

Question 4

Infraspinatus

Answer 4

O: infraspinous fossa of scapula
I: middle facet of greater tubercle of humerus
N: suprascapular nerve (C5-7)
A: ER of arm

Question 5

Teres Minor

Answer 5

O: lateral border of scapula
I: inferior facet of greater tubercle of humerus
N: axillary nerve (C5-6)
A: ER of arm

Question 6

Teres Major

Answer 6

O: dorsal surface of inferior angle of scapula
I: intertubercular groove of humerus
N: subscapular nerve (C5-7)
A: adducts and IR arm

Question 7

Biceps Brachii

Answer 7

O: coracoid process/ supraglenoid tubercle
I: tuberosity of radius
N: musculocutaneous (C5-7)
A: flexes elbow (that is supinated), supination, weak shoulder flexor

Question 8

Brachialis

Answer 8

O: distal part of anterior surface of humerus
I: cornoid process and tuberostiy of ulna
N: musculocutaneous nerve (C5-7)
A: flexes forearm in ALL positions

Question 9

Coracobrachialis

Answer 9

O: tip of coracoid process
I: medial surface of humerus
N: musculocutaneous nerve (C5-7)
A: flexion/adduction of arm

Question 10

Triceps Brachii

Answer 10

O: infraglenoid tubercle, posterior surface of humerus (superior and inferior to radial groove)
I: olecranon
N: radial nerve (C5-T1)
A: extends forearm

Question 11

Anconeus

Answer 11

N: radial nerve (C5-T1)
A: assists triceps in extending forearm

Question 12

Pronator Teres

Answer 12

O: medial epicondyle/ ulnar coronoid process
I: middle of radius
N: median nerve (C6-T1)
A: pronation

Question 13

Flexor Carpi Radialis

Answer 13

O: medial epicondyle
I: base of 2nd metacarpal bone
N: median nerve (C6-T1)
A: flexes and abducts it (radial deviation)

Question 14

Palmaris Longus

Answer 14

O: medial epicondyle
I: flexor retinaculum/ palmar aponeurosis
N: median nerve (C6-T1)
A: flexes wrist/ tightens palmar aponeurosis

Question 15

Flexor Carpi Ulnaris

Answer 15

O: medial epicondyle / olecranon
I: pisiform, hanmate and 5th metacarpal bone
N: ulnar nerve (C7-T1)
A: flexes wrist and adducts (ulnar deviation)

Question 16

Flexor Digitorum Superficialis

Answer 16

O: medial epicondyle/ anterior border of radius
I: middle phalanges of medial 4 digits (medial and lateral sides)
N: medial nerve (C6-T1)
A: flexes middle phalanges; can flex proximal phalanges at MCP joint

Question 17

Flexor Digitorum Profundus

Answer 17

O: medial and anterior surface of ulna
I: bases of distal phalanges of medial 4 digits
N: 4-5 = ulnar; 2-3 = median
A: flexes distal phalanges; flexes PIPs and MCPs/wrist

Question 18

Flexor Pollicis Longus

Answer 18

O: anterior surface of radius
I: base of distal phalanx of thumb
N: anterior interosseous nerve (median nerve)
A: flexes phalanges of thumb (MCP and IP)

Question 19

Pronator Quadratus

Answer 19

O: distal part of anterior surface of ulna
I: anterior surface of radius
N: anterior interosseous (median nerve)
A: pronates forearm

Question 20

Brachioradialis

Answer 20

O: supracondylar ridge of humerus
I: lateral surface of distal end of radius
N: radial nerve (C5-T1)
A: flexes forearm

Question 21

Extensor Carpi Radialis Longus

Answer 21

O: lateral supracondylar ridge of humerus/ lateral epicondyle
I: base of 2nd metacarpal bone
N: radial nerve (C5-T1)
A: extend and abduct hand (radial deviation)

Question 22

Extensor Carpi Radialis Brevis

Answer 22

O: lateral epicondyle
I: base of 3rd metacarpal bone
N: deep branch of radial (C7-C8)
A: extend and abduct (radial deviation)

Question 23

Supinator

Answer 23

O: lateral epicondyle
I: lateral/post/ant surface of radius
N: deep branch of radial (C7-C8)
A: supinates

Question 24

Extensor Carpi Ulnaris

Answer 24

O: lateral epicondyle/ posterior ulna
I: base of 5th metacarpal
N: posterior interosseous (radial nerve) C7-C8
A: extends and adducts (ulnar deviation)

Question 25

Extensor Digitorum

Answer 25

O: lateral epicondyle I: median slip to PIP and 2 lateral slips to DIP N: posterior interosseous (radial nerve) C7-8 A: extends at MCP and wrist

Question 26

Extensor Digiti Minimi

Answer 26

O: lateral epicondyle I: 5th digit N: posterior interosseous A: extends 5th digit at MCP and PIP

Question 27

Extensor Indicis

Answer 27

O: posterior surface of ulna I: 2nd digit N: posterior interosseous nerve (C7-8) A: extends 2nd digit

Question 28

Abductor Pollicis Longus

Answer 28

O: posterior surface of ulna/radius I: base of 1st metacarpal bone N: posterior interosseous A: abducts thumb and wrist

Question 29

Extensor Pollicis Longus

Answer 29

O: posterior surface of ulna (distal to abductor pollicis longus) I: base of distal phalanx of thumb N: posterior interosseous A: extends distal phalanx of thumb at MCP and IP joints

Question 30

Extensor Pollicis Brevis

Answer 30

O: posterior surface of radius I: base of proximal phalanx of thumb N: posterior interosseous A: extends proximal phalanx of thumb

Question 31

Abductor Pollicis Brevis

Answer 31

O: tubercles of scaphoid and trapezium bones I: radial side of base of proximal phalanx of thumb N: recurrent brance of median N (C8-T1) A: abducts thumb and opposition

Question 32

Flexor Pollicis Brevis

Answer 32

O: tubercle of trapezium; trapezoid, capitate I: radial side of base of proximal phalanx of thumb N: recurrent branch of median N and ulnar nerve A: flexes thumb at proximal phalanx

Question 33

Opponens Pollicis

Answer 33

O: tubercle of trapezium bone I: radial side of 1st metacarpal bone N: recurrent branch of median N A: opposes thumb, IR thumb

Question 34

Adductor Pollicis

Answer 34

O: base of 2nd/3rd metacarpals, capitate and adjacent carpal bones I: ulnar side of base of proximal phalanx of thumb N: deep branch of ulnar nerve A: adducts thumb, opposition, flexes thumb at MCP

Question 35

Abductor Digiti Minimi

Answer 35

O: pisiform bone I: medial side of base of proximal phalanx of 5th finger N: deep branch of ulnar A: abducts 5th digit

Question 36

Flexor Digiti Minimi Brevis

Answer 36

O: hook of hanmate I: medial side of base of proximal phalanx of 5th digit N: deep branch of ulnar A: flexes proximal phalanx of 5th digit (MCP joint)

Question 37

Opponens Digiti Minimi

Answer 37

O: hook of hanmate I: medial border of 5th metacarpal N: deep branch of ulnar A: opposition

Question 38

Lumbricals

Answer 38

O: tendons of flexor digitorum profundus I: lateral sides of extensor expansions of digits 2-5 N: 2-3 = median; 4-5= ulnar A: flexes MCP and extends IP joints

Question 39

Dorsal Interossei

Answer 39

ABDUCTS (digits 2,3 4)

Question 40

Palmar Interossei

Answer 40

ADDUCTS (digits 2,4 5)