Muscle Actions Thoracic Limb

Question 1

Advance the limb

Answer 1

Brachiocephalicus m.

Omotransversarius m.

Question 2

Extend the shoulder joint

Answer 2

Brachiocephalicus m.
Pectoral muscles
Supraspinatus m.
Infraspinatus m.
Subscapularis m.
Coracobrachialis m.
Biceps brachii m.

Question 3

Flex the shoulder joint

Answer 3

Latissimus dorsi m.
Deltoideus m.
Teres minor m.
Teres major m.
Triceps brachii m. (long head)

Question 4

Stabilize the shoulder joint

Answer 4

Supraspinatus m.
Infraspinatus m.
Subscapularis m.
Teres major m.

Question 5

Abducts the shoulder joint

Answer 5

Infraspinatus m.

Question 6

Adducts the shoulder joint

Answer 6

Subscapularis m.

Coracobrachialis m.

Question 7

Rotates the shoulder joint

Answer 7

Infraspinatus m.
Teres minor m.
Subscapularis m.

Question 8

Medially rotates the shoulder joint

Answer 8

Teres major m.

Question 9

Draw the neck and head down or to the sides

Answer 9

Brachiocephalicus m.

Question 10

Elevate the forelimb

Answer 10

Trapezius m.

Rhomboideus m.

Question 11

Abduct the limb

Answer 11

Trapezius m.

Question 12

Adduct the limb

Answer 12

Pectoral muscles

Question 13

Draw the scapula against the trunk

Answer 13

Rhomboideus m.

Question 14

Flex the neck laterally

Answer 14

Omotransversarius m.

Question 15

Draw the limb caudally

Answer 15

Latissimus dorsi m.

Question 16

Suspends the trunk

Answer 16

Serratus ventralis m.

Question 17

Depresses the scapula

Answer 17

Serratus ventralis m.

Question 18

Supports the trunk

Answer 18

Pectoral muscles

Question 19

Draw the limb forward & backward

Answer 19

Pectoral muscles

Question 20

Extend the elbow joint

Answer 20

Tensor fasciae antebrachii m.
Triceps brachii m. (medial, lateral, and accessory heads)
Anconeus m.

Question 21

Flex the elbow joint

Answer 21

Biceps brachii m.
Brachialis m.
Supinator m.
Pronator teres m.

Question 22

Extend the carpal joint

Answer 22

Extensor carpi radialis m.
Common digital extensor m.
Lateral digital extensor m.
Abductor digiti 1 longus m.
Extensor carpi obliquus m.

Question 23

Flex the carpal joint

Answer 23

Ulnaris lateralis m.
Flexor carpi radialis m.
Flexor carpi ulnaris m.
Superficial digital flexor m.
Deep digital flexor m.

Question 24

Flexes the metatarsophalangeal joint

Answer 24

Superficial digital flexor m.

Question 25

Flexes the proximal interphalangeal joint

Answer 25

Superficial digital flexor m.

Question 26

Extends the digital joint

Answer 26

Common digital extensor m. | Lateral digital extensor m.

Question 27

Flexes the digital joint

Answer 27

Deep digital flexor m.

Question 28

Abducts digit 1

Answer 28

Abductor digiti 1 longus

Question 29

Lateral rotation of the forearm

Answer 29

Supinator m.

Question 30

Medial rotation of the forearm

Answer 30

Pronator teres m.

Question 31

Pronation of the forepaw

Answer 31

Pronator quadratus m.