Muscles (O, I, A) P. 11-12

Question 1

M. supinator

Answer 1

O: Epicondylus lat. + lig. collat. lat. (humerus)

I: Cranial surface on prox. part of radius

A: Supinates forearm (rotates arm laterally)

Question 2

M. brachioradialis

only 33% of dogs have this

Answer 2

O: Crista epicondylus lat. (humerus)

I: Disto-medially on radius

A: supinates forearm (rotates arm laterally)

Question 3

M. ext. carpi radialis

Answer 3

O: Crista epicondylus lat. (humerus)

I: Mc. II-III

A: Strongest extensor of carpal joints

Question 4

M. ext. carpi ulnaris

Answer 4

O: Epicondylus lat. (humerus)

I: Lateral aspect of Mc. V + Os carpi acceccorius

A: Supports carpus when extended + also helps w/ flexion, abduction and supination of carpal joint

Question 5

M. ext. dig. communis

Answer 5

O: Epicondylus lat. (humerus)

I: Digits II-V

A: Extends carpus, and joints of digits II-V

Question 6

M. ext. dig. lat.

Answer 6

O: Epicondylus lat. + lig. collat. lat. (humerus)

I: Digits III-V

A: extensor of carpus + joints of digits III-V

Question 7

M. ext. digiti I. et II. (pollicis et indicis)

Answer 7

O: Lat. on middle 3rd of ulna

I:
> I. (pollicis) - head of Mc. I
> II. (indicis) - unites w/ M. ext. dig. communis and inserts on digit II

A: Extensor of digits I-II

Question 8

M. abductor digiti I. longus

Answer 8

O: Adjacent lat. surface of radius and ulna + interosseus membrane

I: Mc. I (medially)

A: Extends and abduct digit I

Question 9

M. pronator teres

Answer 9

O: Epicondylus medialis (humerus)

I: Craniomedial surface of radius

A: Pronates forearm (rotate medially)

Question 10

M. pronator quadratus

Answer 10

O + I: Connects apposed surfaces of radius and ulna
(Fills interosseus space medially)

A: Pronates forearm (rotate medially)

Question 11

M. flex. carpi radialis

Answer 11

O: Epicondylus medialis (humerus)

I: Mc. II-III (palmar surface)

A: Flexes carpus

Question 12

M. flex. carpi ulnaris

Answer 12

O:
> caput humerale - epicondylus medialis (humerus)
> caput ulnare - prox. end of ulna

I: Os carpi acceccorius

A: Flexes carpus

Question 13

M. flex. dig. superf.

Answer 13

O: Epicondylus medialis (humerus)

I: Middle phalanx of digits II-V (palmar surface)

A: Flexor of carpus + digits II-V

Question 14

M. flex. dig. prof.

Answer 14

O:
> caput humerale - epicondylus medialis (humerus)
> caput radiale - proximo-medially from radius
> caput ulnare - proximo-caudally from ulna

I: distal phalanx of digits I-V

A: Flexor of carpus + digits I-V