Upper Limb Muscles (A/B/INN/AX)

Question 1

Rhomboids (Major/Minor)

Answer 1

A: (MAJ) Spinous processes T2-T5, (MIN) C7-T1
B: (MAJ) Medial border of Scapula adjacent to spine, (MIN) Medial border of scapula inferior to spine
INN: Dorsal Scapular n
AX: Adducts Scapula

Question 2

Trapezius

Answer 2

A; External occipital protuberance, nuchal ligament, spinal processes C7-T12
B: Lateral 1/3 Clavicle. acromion process, spine of scapula
INN: Accessory CN XI
AX: UPPER/DESCEDING FIBERS- Elevate/Upward rotation of scapula
TRANSVERSE FIBERS- Adduct/retract scapula
LOWER/ASCEDNING FIBERS- Depress/Upward rotation of scapula

Question 3

Latissimus Dorsi

Answer 3

A; Thoracolumbar fascia, spinal processes T7-T12, iliac crest, ribs 9-12
B; Intertubercular groove of humerus (bicipital groove)
INN: Thoracodorsal n.
AX: Arm medial rotation, adduction, extension

Question 4

Levator Scapulae

Answer 4

A: Transverse Processes C1-C4
B: Medial border of scapula
INN: Dorsal Scapular n
AX: Elevates Scapula

Question 5

Pectoralis Major

Answer 5

A: Clavicular head- Medial half of clavicle, Sternocostal head- Manubrium & body of sternum, true ribs and costal cartilages
B: Bicipital groove of humerus or intertubercular sulcus
INN: Lateral/medial pectoral nn
AX: Arm adduction, medial rotation, FLEX/EXT

Question 6

Pectoralis Minor

Answer 6

A: Ribs 3-5
B: Coracoid process of scapula
INN: Lateral/Medial pectoral nn
AX: Depresses and stabilizes scapula

Question 7

Deltoids

Answer 7

A: Clavicular head- lateral 1/3 of clavicle
Acromial- acromion
Spinal- Spine of scapula
B: Deltoid tuberosity of humerus
INN: Axillary n
AX:Clavicular- FLEX,ABD
Acromial-ABD
Spinal- EXT/lateral rotation

Question 8

Serratus anterior

Answer 8

A: External surface of ribs 1-9
B: Medial border of Scapula
INN: Long thoracic n
AX: Protracts scapula, holds scapula on thoracic wall

Question 9

Supraspinatus/Infraspinatus

Answer 9

A: (S) Supraspinous fossa of scapula, (I) Infraspinous fossa of scapula
B: Greater tubercle of humerus
INN: Suprascapular n
AX: (S) arm ABD, (I) Lateral rotation, (S&I) Stabilizes arm at glenohumeral joint

Question 10

Subscapularis

Answer 10

A: Subscapular fossa of scapula
B: Lesser tubercle of humerus
INN: Upper/lower subscapular nn
AX: Arm medial rotation & stabilizes at glenohumeral joint

Question 11

Teres Major/Minor

Answer 11

A: (MAJ) inferior angle of scapula, (MIN) Superior half of lateral border of scapula
B: (MAJ) bicipital groove. (MIN) greater tubercle of humerus
INN: (MAJ) Lower subscapular n, (MIN) Axillary n
AX: (MAJ) Arm ADD/medial rotation, (MIN) Arm lateral rotation and stabilization

Question 12

Triceps Brachii (Long/Medial/Lateral head)

Answer 12

A: (LONG) infraglenoid tubercle of scapula
(MED) posterior humerus, inferior to radial groove
(LAT) posterior humerus, superior to radial groove
B: Olecranon process of Ulna
INN: radial n
AX: Forearm EXT, Arm EXT/ADD

Question 13

Biceps Brachii (Long/Short head)

Answer 13

A:(L) Supraglenoid tubercle of scapula
(S) Coracoid process of scapula
B: Radial Tuberosity & bicipital aponeurosis
INN: Musculocutaneous n
AX: Arm/forearm FLEX, Supination

Question 14

Brachialis

Answer 14

A: Distal half of anterior Humerus
B: Coronoid process & tuberosity of ulna
INN: Musculocutaneous n
AX: Forearm FLEX

Question 15

Coracobrachialis

Answer 15

A: Coracoid Process of Scapula
B: Middle 1/3 of medial humerus
INN: Musculocutaneous n
AX: Arm ADD/FLEX

Question 16

Pronator Teres

Answer 16

A: Medial epicondyle of humerus
B: Proximal lateral radius
INN: Median n
AX: Pronation and Forearm FLEX

Question 17

Flexor carpi radialis

Answer 17

A: Medial epicondyle of humerus
B: Base of metacarpals 2&3
INN: Median n
AX: Wrist FLEX/ABD

Question 18

Flexor carpi ulnaris

Answer 18

A: Medial epicondyle of humerus
B: Pisiform
INN: Ulnar n
AX: Wrist FLEX/ADD

Question 19

Palmaris Longus

Answer 19

A: Medial epicondyle of humerus
B: palmar aponeurosis
INN: Median n
AX: Wrist FLEX

Question 20

Flexor digitorum superficialis

Answer 20

A: Medial epicondyle of humerus, proximal radius
B: middle phalanges of digits 2-5
INN: median n
AX: MP & proximal IP Joint flexion for digits 2-5

Question 21

Flexor digitorum profundus

Answer 21

A: Proximal Ulna & interosseous membrane
B: Distal phalanges of digits 2-5
INN: Medial half- Median n, Lateral Half- Ulnar n
AX: Wrist, DIstal IP, & MP joint flexion for digits 2-5

Question 22

Flexor pollicis Longus

Answer 22

A: Anterior radius & interosseous membrane
B: Distal phalanx of digit 1
INN: Median n
AX: MP & IP joint FLEX of digit 1

Question 23

Brachioradialis

Answer 23

A: lateral supracondylar ridge of humerus
B: distal radius
INN: radial n
AX: Forearm FLEX

Question 24

Supinator

Answer 24

A: Lateral epicondyle of humerus and posterior ulna
B: posterior radius
INN: radial n
AX: Supination

Question 25

Pronator quadratus

Answer 25

A: Distal anterior ulna
B: distal anterior radius
INN: median n
AX: forearm pronation

Question 26

Extensor indicis

Answer 26

A: Posterior ulna & interosseous membrane
B: Extensor hood of digit 2
INN: radial n
AX: digit 2 IP and MP joint extension

Question 27

Extensor carpi ulnaris

Answer 27

A: Lateral epicondyle of humerus
B: Base metacarpal 5
INN: radial n
AX: wrist extension & ADD

Question 28

Extensor carpi radialis longus

Answer 28

A: Lateral supracondylar ridge of humerus
B: metacarpal 2
INN: radial n
AX: wrist EXT/ABD

Question 29

Extensor carpi radialis brevis

Answer 29

A: Lateral epicondyle of humerus
B: metacarpal 3
INN: radial n
AX: wrist EXT/ABD

Question 30

Extensor digitorum

Answer 30

A: Lateral epicondyle of humerus
B: extensor hood of digits 2-5
INN: radial n
AX: digits 2-5 MP/IP joint EXT

Question 31

Extensor digiti minimi

Answer 31

A: lateral epicondyle of humerus
B: extensor digitorum tendon to digit 5
INN: radial n
AX: digit5 MP/IP joint EXT

Question 32

ABductor pollicis longus

Answer 32

A: Proximal radius, ulna, and interosseous membrane
B: metacarpal 1
INN: radial n
AX: hand extension digit 1 ABD/EXT

Question 33

Extensor pollicis brevis

Answer 33

A: Distal 1/3 radius & interosseous membrane
B: Proximal phalanx of digit 1
INN: radial n
AX: Digit 1 MP CM joint EXT

Question 34

Extensor pollicis longus

Answer 34

A: Middle 1/3 of ulna and interosseous membrane
B: Distal phalanx of digit 1
INN: radial n
AX: Digit 1 MP,IP,&CM joint EXT

Question 35

ABductor pollicis brevis

Answer 35

A: Flexor retinaculum, scaphoid, and trapezium
B: Lateral proximal phalanx of digit 1
INN: median n
AX: digit 1 ABD

Question 36

flexor pollicis brevis

Answer 36

A: Flexor retinaculum & trapezium
B: Lateral proximal phalanx of digit 1
INN: median n
AX: digit 1 FLEX

Question 37

ADDuctor pollicis

Answer 37

A: Metacarpals 2 & 3
B: Medial proximal phalanx of digit 1
INN: Ulnar n
AX: digit 1 ADD

Question 38

ABductor digiti minimi

Answer 38

A: Flexor retinaculum & pisiform
B: medial proximal phalanx of digit 5
INN: ulnar n
AX: digit 5 ABD

Question 39

Flexor digiti minimi

Answer 39

A: Flexor retinaculum & hamate
B: medial proximal phalanx of digit 5
INN: ulnar n
AX: digit 5 FLEX

Question 40

opponens pollicis

Answer 40

A: Flexor retinaculum & trapezium
B: lateral side of metacarpal 1
INN: Median n
AX: opposes digit 1

Question 41

opponens digit minimi

Answer 41

A: Flexor retinaculum & hamate
B: medial side of metacarpal 5
INN: Ulnar n
AX: opposes digit 5

Question 42

Dorsal interossei

Answer 42

A: Adjacent metacarpal bones
B: extensor expansion and adjacent
INN: Ulnar n
AX: Digit ABD (digit 3 is midline)

Question 43

palmar interossei

Answer 43

A: Metacarpals 2,4,5
B: Extensor expansion & adjacent phalanx
INN: Ulnar n
AX: Digit ADD (digit 3 is midline)