Intrinsic Muscles of the Thoracic Limb

Question 1

*Lateral Muscles of the Scapula and Shoulder

____ from the spine and acromial process of the scapula to deltoid tuberosity; divided into distal and proximal parts:

Answer 1

deltoideus
distal part & proximal part

Question 2

arises from acromnion and has fusiform shape

Answer 2

distal part

Question 3

covers the infraspinatus; innervated by axillary nerve

Answer 3

proximal part

Question 4

*Lateral Muscles of the Scapula and Shoulder

occupies the infraspinous fossa and is innervated by suprascapular nerve

Answer 4

infraspinatus

Question 5

*Lateral Muscles of the Scapula and Shoulder

occupies the supraspinous fossa and is innervated by suprascapular nerve

Answer 5

supraspinatus

Question 6

*Lateral Muscles of the Scapula and Shoulder

from infraglenoid tubercle to the teres minor tuberosity; a small, wedge-shaped muscle; innervated by axillary nerve

Answer 6

teres minor

Question 7

extends the elbow and flexes the shoulder

Answer 7

deltoideus

Question 8

flexion or extension depending on the location of the joint

Answer 8

infraspinatus

Question 9

extends the shoulder

Answer 9

supraspinatus

Question 10

flex the shoulder

Answer 10

teres minor

Question 11

*Medial Muscles of the Scapula and Shoulder

occupies the entire subscapular fossa; innervated by subscapular nerve

Answer 11

subscapularis

Question 12

*Medial Muscles of the Scapula and Shoulder

lies directly caudal to subscapularis; innervated by axillary nerve

Answer 12

teres major

Question 13

*Medial Muscles of the Scapula and Shoulder

a small spindle-shaped muscle from coracoid process of the scapula to the crest of the lesser tubercle of the humerus; innervated by musculocutaneous nerve

Answer 13

coracobrachialis

Question 14

adduct and extend the shoulder

Answer 14

subscapularis

Question 15

flex and medially rotate the shoulder

Answer 15

teres major

Question 16

stabilize the joint

Answer 16

coracobrachialis

Question 17

*Caudal Muscles of the Arm

a thin strap that extends from latissimus dorsi to the olecranon

Answer 17

tensor fasciae antebrachii

Question 18

*Caudal Muscles of the Arm

has 4 heads: long head, lateral head, medial head and accessory head.

Answer 18

triceps brachii

Question 19

*Caudal Muscles of the Arm

a small muscle located almost completely in the olecranon fossa

Answer 19

anconeus

Question 20

extends the elbow

Answer 20

tensor fascia antebrachii

Question 21

extends the elbow and flexes the shoulder

Answer 21

triceps brachii

Question 22

to extend the elbow

Answer 22

anconeus

Question 23

*Cranial Muscles of the Arm

a fusiform muscle that lies on the medial and cranial surfaces of the humerus. It arises on the supraglenoid tuberosity and inserts on proximal ends of the radius and ulna; innervated by musculocutaneous nerve

Answer 23

biceps brachii

Question 24

*Cranial Muscles of the Arm

lies in the brachialis groove of the humerus; innervated by musculocutaneous nerve

Answer 24

brachialis

Question 25

extends the shoulder and flexes the elbow

Answer 25

biceps brachii

Question 26

to flex the elbow

Answer 26

brachialis

Question 27

*Cranial and Lateral Muscles of the Forearm largest of the craniolateral antebrachial muscles; lies on the cranial surface of the radius; innervated by the radial nerve

Answer 27

extensor carpi radialis

Question 28

*Cranial and Lateral Muscles of the Forearm lies caudal to the extensor carpi radialis on the lateral side; has 4 individual tendons that leave the muscle; innervated by radial nerve

Answer 28

common digital extensor

Question 29

*Cranial and Lateral Muscles of the Forearm lies between common digital extensor and ulnaris lateralis; about half the size of common digital extensor; innervated by radial nerve

Answer 29

lateral digital extensor

Question 30

*Cranial and Lateral Muscles of the Forearm behind lateral digital extensor; the only flexor that arises from extensor group of muscles; innervated by radial nerve

Answer 30

ulnaris lateralis

Question 31

*Cranial and Lateral Muscles of the Forearm short, broad and flat, obliquely placed across the lateral side of the flexor surface of the elbow from the lateral epicondyle of the humerus to the cranial surface of the proximal fourth of the radius; innervated by the radial nerve

Answer 31

supinator

Question 32

*Cranial and Lateral Muscles of the Forearm extends obliquely across the medial surface of the elbow from the medial epicondyle of the humerus to the proximal middle 3rd of the radius; innervated by the median nerve

Answer 32

pronator teres

Question 33

*Cranial and Lateral Muscles of the Forearm lies primarily in the groove between radius and ulna and is triangular

Answer 33

abductor pollicis longus

Question 34

supination

Answer 34

supinator

Question 35

pronation

Answer 35

pronator teres

Question 36

*Caudal and Medial Muscles of the Forearm lies between the pronator teres cranially and superficial digital flexor caudally; innervated by the median nerve

Answer 36

flexor carpi radialis

Question 37

*Caudal and Medial Muscles of the Forearm lies on the caudomedial side of the forearm from the medial epicondyle of the humerus to the palmar surface of the middle phalanges of digits I, II, III, IV and V; covers the deep digital flexor; innervated by the median nerve

Answer 37

superficial digital flexor

Question 38

*Caudal and Medial Muscles of the Forearm has 2 heads: ulnar and humeral heads; ulnar dead arises from caudal body of the proximal end of the ulna; humeral head arises from medial epicondyle of humerus; lies cranial to the ulnar head and inserts on the accessory carpal bone

Answer 38

flexor carpi ulnaris

Question 39

*Caudal and Medial Muscles of the Forearm humeral head has several bellies; xtends from medial epicondyle of the humerus; ulnar head extends from caudal border of the ulna and radial head which is the smallest extends from medial border of the radius; innervated by the median and ulnar nerves

Answer 39

deep digital flexor

Question 40

*Caudal and Medial Muscles of the Forearm fills in the space between the radius and ulna; the fibers of which run transversely; innervated by median nerve

Answer 40

pronator quadratus