Upper Limb Muscle Chart

Question 1

Pectoralis major

Answer 1

Clavicle, sternum, costal cartilages of upper ribs
Lip of the intertubercular sulcus
Medial and lateral pectoral nn
Adducts/medially rotates arm (also aids in flexion and extension of the humerus)

Question 2

Pectoralis minor

Answer 2

Ribs near the costal cartilage
Coracoid process
Medial pectoral n
Stabilizes the scapula

Question 3

Subclavius

Answer 3

First rib
Clavicle
Nerve to the subclavius
Anchors/depresses clavicle

Question 4

Serratus anterior

Answer 4

Lateral surface of the ribs
Medial border of the scapula
Long thoracic n
Protracts scapula/holds it against the thoracic wall

Question 5

Deltoid

Answer 5

Clavicle, acromion, spine of the scapula
Deltoid tuberosity
Axillary n
Anterior fibers- flex/medially rotate arm
Middle fibers- abducts
Posterior fibers- extend/laterally rotate arm

Question 6

Infraspinatus

Answer 6

Infraspinous fossa
Greater tubercle of humerus
Suprascapular n
Laterally rotates the arm

Question 7

Supraspinatus

Answer 7

Supraspinatus fossa
Greater tubercle of the humerus
Suprascapular n
Initiates arm abduction for deltoid

Question 8

Teres minor

Answer 8

Lateral border of the scapula
Greater tubercle of humerus
Axillary nerve
Laterally rotates the arm

Question 9

Teres major

Answer 9

Inferior angle of scapula
Lip of intertubercular sulcus
Lower subscapular n
Adducts/medially rotates the arm

Question 10

Subscapularis

Answer 10

Subscapular fossa
Lesser tubercle of humerus
Upper and lower subscapular nn
Medially rotates the arm

Question 11

Biceps brachii

Answer 11

Short head- coracoid process
Long head- Supra glenoid tubercle
Radial tuberosity and bicipital aponeurosis
Musculocutaneous nerve
Flexes and supinate the forearm

Question 12

Coracobrachialis

Answer 12

Coracoid process
Midshaft of humerus
Musculocutaneous n
Weakly flexes and adducts the arm

Question 13

Brachialis

Answer 13

Distal humeral shaft
Coronoid process of ulna
Musculocutaneous (small contribution from radial n)
Flexes forearm

Question 14

Triceps brachii

Answer 14

Long head- infraglenoid tubercle
Lateral and medial heads: shaft of humerus
Olecranon process
Radial n
Extends forearm

Question 15

Anconeus

Answer 15

Lateral epicondyle
Proximal ulna
Radial n
Weakly extends forearm

Question 16

Pronator teres

Answer 16

Coronoid process and medial condyle
Radial shaft
Median n
Pronates/flexes forearm

Question 17

Palmaris longus

Answer 17

Medial epicondyle of humerus
Flexor retinaculum and palmar aponeurosis
Median n
Flexes hand/tenses palmar aponeurosis

Question 18

Flexor carpi radialis

Answer 18

Medial epicondyle
2nd metacarpal
Median n
Flexes/abducts hand

Question 19

Flexor carpi ulnaris

Answer 19

Medial epicondyle of humerus and olecranon process
Pisiform, hook of hamate, 5th metacarpal
Ulnar n*
Flexes/adducts hand

Question 20

Flexor digitorum superficialis

Answer 20

Medial epicondyle and proximal radius
Middle phalanges of digits 2-5
Median n
Flexes PIP and MP digits of 2-5

Question 21

Flexor digitorum profundus

Answer 21

Proximal and middle ulna
Distal phalanges digits 2-5
Ulnar n (medial half); median n (lateral half)
Flexed DIP of digits 2-5

Question 22

Flexor pollicis longus

Answer 22

Radial shaft
Distal phalanx of thumb
Median n
Flexes thumb

Question 23

Pronator quadratus

Answer 23

Distal ulna
Distal radius
Median n
Pronates forearm

Question 24

Brachioradialis

Answer 24

Supraepicondylar ridge of humerus
Distal radius
Radial n
Flexes forearm

Question 25

Extensor carpi radialis longus

Answer 25

Lateral supraepicondylar ridge of humerus 2nd metacarpal Radial n Extends/abducts hand

Question 26

Extensor carpi radialis brevis

Answer 26

Lateral epicondyle 3rd metacarpal Radial n Extends/abducts hand

Question 27

Extensor digitorum

Answer 27

Lateral epicondyle of humerus Extensor expansion of digits 2-5 Radial n Extends MP and IP joints of 2-5

Question 28

Extensor digiti minimi

Answer 28

Lateral epicondyle of humerus Extensor expansion of digit 5 Radial n Extends MP and IP joint of digit 5

Question 29

Extensor carpi ulnaris

Answer 29

Lateral epicondyle of humerus and proximal ulna 5th metacarpal Radial n Extends/adducts hand

Question 30

Supinator

Answer 30

Lateral epicondyle of humerus Proximal radius Radial n Supinates forearm

Question 31

Extensor indicis

Answer 31

Distal ulna Extensor expansion of digit 2 Radial n Extends digit 2

Question 32

Abductor pollicis longus

Answer 32

Proximal ulna and radius 1st metacarpal Radial nerve Abducts thumb

Question 33

Extensor pollicis longus

Answer 33

Midshaft of ulna Distal phalanx of thumb Radial n Extends thumb

Question 34

Extensor pollicis brevis

Answer 34

Distal radius Proximal phalanx of thumb Radial nerve Extends thumb

Question 35

Opponens pollicis

Answer 35

Flexor retinaculum and carpal bones 1st metacarpal Recurrent branch of the median n Opposes thumb

Question 36

Abductor pollicis brevis

Answer 36

Flexor retinaculum and carpal bones Proximal phalanx of thumb Recurrent branch of the median n Abducts thumb

Question 37

Flexor pollicis brevis

Answer 37

Flexor retinaculum and carpal bones Proximal phalanx of thumb Recurrent branch of median n Flexes thumb

Question 38

Adductor pollicis

Answer 38

``` Oblique head- 2nd and 3rd metacarpal and adj carpal bones Transverse head- 3rd metacarpal Proximal phalanx of thumb Ulnar n Adducts thumb ```

Question 39

Abductor digiti minimi

Answer 39

Pisiform Proximal phalanx of 5th digit Ulnar n Abducts 5th digit

Question 40

Flexor digiti minimi

Answer 40

Hook of hamate Proximal phalanx of 5th digit Ulnar n Flexes 5th digit

Question 41

Opponens digiti minimi

Answer 41

Hook of hamate 5th metacarpal Ulnar n Opposes 5th digit

Question 42

Lumbricals 1+2

Answer 42

Lateral 2 tendons of the FDP Extensor expansions of digits 2+3 Median Flexes MP joint, extends IP joint

Question 43

Lumbricals 3+4

Answer 43

Median 3 tendons of FDP Extensor expansion of digits 4+5 Ulnar n Flex MP, extends IP

Question 44

Dorsal interossei (4)

Answer 44

Adjacent sides of metacarpals Proximal phalanges and extensor expansions Ulnar n Abducts digits 2-4, assists lumbricals

Question 45

Palmar interossei (3)

Answer 45

Palmar surface of metacarpals 2,4 and 5 Proximal phalanges and extensor expansions Ulnar n Adducts digits 2,4 and 5; assists lumbricals