Muscles primarily acting at carpal and phalangeal joints

Question 1

Brachioradialis- O

Answer 1

Lateral supracondylar crest of humerus

Question 2

Brachioradialis- I

Answer 2

Distal one-quarter of radius

Question 3

Brachioradialis- N

Answer 3

Radial n

Question 4

Brachioradialis- A

Answer 4

Supinator of forearm flexor of elbow

Question 5

Extensor carpi radialis- O

Answer 5

Lateral epicondyle of humerus

Question 6

Extensor carpi radialis- I

Answer 6

Small tuberosities on the dorsal surfaces of the base of metacarpals II and III

Question 7

Extensor carpi radialis- N

Answer 7

Radial n.

Question 8

Extensor carpi radialis- A

Answer 8

Extend the carpal joints

Question 9

Extensor digitorum communis- O

Answer 9

Lateral epicondyle of humerus

Question 10

Extensor digitorum communis- I

Answer 10

The extensor prcesses of the distal phalanges of digits II, III, IV, V

Question 11

Extensor digitorum communis- N

Answer 11

Radial n.

Question 12

Extensor digitorum communis- A

Answer 12

Extend the joints of the four principal digits and the carpus

Question 13

Extensor digitorum lateralis- O

Answer 13

Lateral supracondylar crest of humerus

Question 14

Extensor digitorum lateralis- I

Answer 14

The proximal ends of all the phalanges of digits III, IV, and V, but mainly the extensor processes of the distal phalanges of these digits

Question 15

Extensor digitorum lateralis- N

Answer 15

Radial n.

Question 16

Extensor digitorum lateralis- A

Answer 16

Extend the carpus and joints of digits III, IV, and V

Question 17

Ulnaris lateralis- O

Answer 17

Lateral epicondyle of humerus

Question 18

Ulnaris lateralis- I

Answer 18

The lateral aspect of the proximal end of metacarpal V and the accessory carpal bone

Question 19

Ulnaris lateralis- N

Answer 19

Radial n.

Question 20

Ulnaris lateralis- A

Answer 20

Abduct the manus; FLEX the carpal joint, support the carpus when extended to support weight

Question 21

Abductor digiti I longus- O

Answer 21

The lateral border and cranial surface of the body of the ulna; the interosseous membrane

Question 22

Abductor digiti I longus- I

Answer 22

The proximal end of metacarpal I

Question 23

Abductor digiti I longus- N

Answer 23

Radial n.

Question 24

Abductor digiti I longus- A

Answer 24

Abduct the first digit or pollex and extend the carpal joints

Question 25

Supinator- O

Answer 25

Lateral epicondyle of humerus

Question 26

Supinator- I

Answer 26

The cranial surface of the proximal fourth of the radius

Question 27

Supinator- N

Answer 27

Radial n.

Question 28

Supinator- A

Answer 28

Supinator of forearm; flexor of elbow

Question 29

Pronator teres- O

Answer 29

Medial epicondyle of humerus

Question 30

Pronator teres- I

Answer 30

Medial border of the radius between the proximal and middle thirds

Question 31

Pronator teres- N

Answer 31

Median n.

Question 32

Pronator teres- A

Answer 32

Pronate antebrachium; flex elbow

Question 33

Flexor carpi radialis- O

Answer 33

Medial epicondyle of humerus and medial border of radius

Question 34

Flexor carpi radialis- I

Answer 34

Palmar side of the base of metacarpals II and III

Question 35

Flexor carpi radialis- N

Answer 35

Median n.

Question 36

Flexor carpi radialis- A

Answer 36

Flex the carpus

Question 37

Flexor digitorum superficialis- O

Answer 37

Medial epicondyle of humerus

Question 38

Flexor digitorum superficialis- I

Answer 38

Palmar surface of the base (proximal end) of the middle phalanges of digits II, III, IV, V

Question 39

Flexor digitorum superficialis- N

Answer 39

Median n.

Question 40

Flexor digitorum superficialis- A

Answer 40

Flex the carpal, metacarpophalangeal, and proximal interphalangeal joints of digits II, III, IV, V

Question 41

Flexor carpi ulnarius- O (of 2 heads)

Answer 41

1) Ulnar head- the caudal border and medial surface of the olecranon
2) Humeral head- medial epicondyle of the humerus

Question 42

Flexor carpi ulnarius- I

Answer 42

Accessory carpal bone

Question 43

Flexor carpi ulnarius- N

Answer 43

ULNAR N.

Question 44

Flexor carpi ulnarius- A

Answer 44

Flex the carpus

Question 45

Flexor digitorum profundus- O (of 3 heads)

Answer 45

1) Humeral head- the medial epicondyle of the humerus;
2) Ulnar head- the proximal three fourths of the caudal border of the ulna;
3) Radial head- the middle third of the medial border of the radius

Question 46

Flexor digitorum profundus- I

Answer 46

Flexor tubercle on the palmar surface of the distal phalanx of each digit

Question 47

Flexor digitorum profundus- N

Answer 47

Median n. and ULNAR N.

Question 48

Flexor digitorum profundus- A

Answer 48

Flex the carpal and metacarpophalangeal joints and the proximal and distal interphalangeal joints of the digits

Question 49

Pronator quadratus- O

Answer 49

Distal ulna

Question 50

Pronator quadratus- I

Answer 50

Distal radius

Question 51

Pronator quadratus- N

Answer 51

Median n.

Question 52

Pronator quadratus- A

Answer 52

Pronate antebrachium

Question 53

Which muscles primarily acting at carpal and phalangeal joints is part of the ‘craniolateral’ group?

Answer 53

Brachioradialis, Extensor carpi radialis, Extensor digitorum communis, Extensor digitorum lateralis, Ulnaris lateralis, Abductor digiti I longus, Supinator

Question 54

Which muscles primarily acting at carpal and phalangeal joints is part of the ‘caudal’ group?

Answer 54

Pronator teres, Flexor carpi radialis, Flexor digitorum superficialis, Flexor carpi ulnaris, Flexor digitorum profundus, Pronator quadratus