Group 3

Question 1

Extensor carpi radialis

Answer 1

O: Lateral epicondyle of humerus (supracondylar crest)
I: Proximodorsal on MC3
F: Extends carpus, Flexes elbow
N: Radial n.

Question 2

Extensor digitorum communis

Answer 2

O: Head of radius, Lateral epicondyle of humerus, Head of ulna
I: Proximodorsal on prox, middle + distal phalanges
F: Extends carpus + digits
N: Radial n.

Question 3

Extensor digitorum lateralis

Answer 3

O: Proximal radius + ulna
I: Proximodorsal on P1
F: Extends carpus + fetlock (no digits)
N: Radial n.

Question 4

Ulnaris lateralis

Answer 4

O: Lateral epicondyle of humerus
I: Accessory carpal bone + MC4
F: Flexes carpus
N: Radial n.

Question 5

Flexor carpi ulnaris

Answer 5

O: Medial epicondyle of humerus; medial on olecranon
I: Accessory carpal bone
F: Flexes carpus
N: Ulnar n.

Question 6

Flexor carpi radialis

Answer 6

O: Medial epicondyle of humerus
I: Proximal end of MC2
F: Flexes carpus
N: Median n.

Question 7

FL Flexor digitorum superficialis

Answer 7

O: Medial epicondyle of humerus
I: Bifurcates below sesamoids: inserts distal on P1 and proximal on PII
F: Flexes digit + carpus, Extends elbow
N: Ulnar n.

Question 8

FL Flexor digitorum profundus

Answer 8

O: Medial epicondyle of humerus, Medial olecranon, Caudal radius
I: Flexor surface of distal phalanx
F: Flexes digit + carpus, Extends elbow
N: Median + Ulnar nn.

Question 9

FL interosseus/suspensory

Answer 9

O: Proximocaudal on MC3 + Palmar carpal ligament
I: Prox. sesamoids + branches to insert with common digital extensor
F: Counteracts over extension of fetlock
N: Ulnar n.