A. LAB (Intrinsic Muscles FL Forearm)

Question 1

Extensor carpi radialis O+I

Answer 1

O: Lateral supracondylar crest
I: Small tuberosities on the dorsal surface of the base of metacarpals II and III

Question 2

Extensor carpi radialis A

Answer 2

Extend the carpal joints

Question 3

Common digital extensor O+I

Answer 3

O: Lateral epicondyle of the humerus
I: Extensor processes of the distal phalanges of digits II, III, IV, V

Question 4

Common digital extensor A

Answer 4

Extend the joints of the four principal digits and the carpus

Question 5

Lateral digital extensor O+I

Answer 5

O: Lateral epicondyle of the humerus
I: -proximal of all the phalanges of digits III, IV, and V
-mainly the extensor process of their distal phalanges

Question 6

Lateral digital extensor A

Answer 6

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

Question 7

Ulnaris lateralis O+I

Answer 7

O: Lateral epicondyle of the humerus
I: Lateral aspect of the proximal end of metacarpal V and the accessory carpal bone

Question 8

Ulnaris lateralis A

Answer 8

-abduct the manus
-flex the carpal joints
-support carpus when extended to support weight

Question 9

Supinator O+I

Answer 9

O: Lateral epicondyle of the humerus
I: Lateral epicondyle of the humerus

Question 10

Supinator A

Answer 10

Supinates

Question 11

Abductor digiti I longus O+I

Answer 11

O: -lateral border and cranial surface of the body of the ulna
-interosseous membrane
I: Proximal end of metacarpal I

Question 12

Abductor digiti I longus A

Answer 12

-abduct the first digit or pollex
-extend the carpal joints

Question 13

Pronator teres O+I

Answer 13

O: Medial epicondyle of the humerus
I: Medial border of the radius between the proximal and middle thirds

Question 14

Pronator teres A

Answer 14

-rotate forearm medially so that palmar side of paw faces ground
-flex the elbow

Question 15

Flexor carpi radialis O+I

Answer 15

O: -medial epicondyle of the humerus
-medial border of the radius
I: Palmar side of the base of metacarpals II and III

Question 16

Flexor carpi radialis A

Answer 16

Flex the carpal joints

Question 17

Superficial digital flexor O+I

Answer 17

O: Medial epicondyle of the humerus
I: Palmar surface of the base (proximal end) of the middle phalanges of digits II, III, IV and V

Question 18

Superficial digital flexor A

Answer 18

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

Question 19

Flexor carpi ulnaris: Ulnar head O+I

Answer 19

O: Caudal border and medial surface of olecranon
I: Accessory carpal bone

Question 20

Flexor carpi ulnaris: Humeral head O+I

Answer 20

O: Medial epicondyle of the humerus
I: Accessory carpal bone

Question 21

Flexor carpi ulnaris A

Answer 21

Flex the carpus

Question 22

Deep digital flexor O+I

Answer 22

*3 heads
O: -medial epicondyle of humerus
-proximal 3/4th of the caudal border of the ulna
-middle third of the medial border of the radius
I: Flexor tubercule of the palmar surface of the distal phalanx of each digit

Question 23

Deep digital flexor A

Answer 23

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

Question 24

Pronator quadratus attachments

Answer 24

-apposed surfaces of the radius and ulna

Question 25

Pronator quadratus A

Answer 25

Pronate the paw

Question 26

Interosseus

Answer 26

-cover the palmar surfaces of the four main metacarpal bones
-arises from base of its metacarpal bone
-attach to base of proximal phalanx
-flexor of the metacarpophalangeal joint during weight bearing