Vessels and Nerves of the Thoracic Limb

Question 1

The main arterial blood supply to the thoracic limb arises within the thorax as the…

Answer 1

Subclavian artery

Question 2

The subclavian artery is a terminal branch of ___ on the right side, and a direct branch of ___ on the left side

Answer 2

The brachiocephalic; the aorta

Question 3

VCISA

Answer 3

Vertebral, costocervical, internal thoracic, superficial cervical and axillary

Question 4

What does the superficial cervical artery supply

Answer 4

The superficial muscles of the base of the neck, the superficial cervical lymph nodes, the muscles of the scapula and shoulder

Question 5

The brachial plexus is formed by…

Answer 5

The ventral branches of the 6-8 C and 1-2 T spinal nerves

Question 6

What did we have to reflect to expose the vessels and nerves on the medial aspect of the arm

Answer 6

The superficial and deep pectoral muscles

Question 7

The axillary artery extends from/to…

Answer 7

The first rib to the conjoined tendons of the teres major and latissimus dorsi

Question 8

What are the 4 primary branches of the axillary

Answer 8

External thoracic, lateral thoracic, subscapular and cranial circumflex humeral

Question 9

The external thoracic artery is distributed almost entirely on…

Answer 9

The superficial pectorals (with the nerve)

Question 10

The lateral thoracic artery supplies…

Answer 10

Part of latissimus dorsi, deep pectoral, cutaneous trunci and thoracic mammae

Question 11

What are the branches of the subscapular artery

Answer 11

Thoracodorsal, caudal circumflex humeral and circumflex scapula

Question 12

What has to be transected to see the subscapular artery

Answer 12

The teres major

Question 13

What does the thoracodorsal supply

Answer 13

Part of the teres major and latissimus dorsi (ends in the skin)

Question 14

The caudal circumflex humeral artery supplies…

Answer 14

Triceps, deltoideus, coracobrachialis, and infraspinatus muscles and the shoulder joint capsule

Question 15

The circumflex scapula supplies…

Answer 15

The subscapularis and infraspinatus

Question 16

The cranial circumflex humeral supplies…

Answer 16

The biceps brachii and the joint capsule of the shoulder

Question 17

After the cranial circumflex humeral artery, the axillary turns into the…

Answer 17

Brachial artery

Question 18

Branches of the brachial artery

Answer 18

Deep brachial, bicipital, collateral ulnar, superficial brachial, transverse cubital and deep antebrachial

Question 19

The brachial continues into the proximal forearm and gives off…

Answer 19

The common interosseus

Question 20

The collateral ulnar artery supplies…

Answer 20

The triceps, ulnar nerve and the elbow

Question 21

The superficial brachial artery continues on the forearm as the…

Answer 21

Cranial superficial antebrachial artery (medial and lateral branches)

Question 22

All the nerves dissected contain…

Answer 22

Somatic efferent neurons to striated muscles and afferent neurons from these muscles

Question 23

Cutaneous somatic afferents are only found in…

Answer 23

Musculocutaneous, axillary, radial, median and ulnar

Question 24

Cranial pectoral nerves arise from…

Answer 24

Ventral branches of the 6-8 C spinal nerves

Question 25

Cranial pectoral nerves innervate...

Answer 25

Superficial pectorals

Question 26

Suprascapular nerve leaves...

Answer 26

The 6-7 C spinal nerve

Question 27

Suprascapular nerve supplies...

Answer 27

Supraspinatus and infraspinatus

Question 28

What did we have to transect to expose the supraspinatus nerve

Answer 28

Supraspinatus muscle

Question 29

Subscapular nerve arises from...

Answer 29

6-7 C spinal nerve

Question 30

Subscapular nerve innervates...

Answer 30

Subscapularis

Question 31

Musculocutaneous nerve arises from...

Answer 31

6-8 C spinal nerves

Question 32

What does the musculocutaneous nerve lie between

Answer 32

Biceps brachii cranially and brachial vessels caudally

Question 33

Musculocutaneous supplies...

Answer 33

Coracobrachialis, biceps brachii and brachialis

Question 34

A branch of the musculocutaneous nerve communicates with...

Answer 34

The median nerve

Question 35

At the distal end of the brachialis, the musculocutaneous nerve gives off...

Answer 35

The medial cutaneous antebrachial nerve (usually removed with the skin)

Question 36

Axillary nerve arises from...

Answer 36

Combined 7-8 C spinal nerves

Question 37

Axillary nerve innervates...

Answer 37

Teres major, teres minor, deltoideus, and part of subscapularis

Question 38

Thoracodorsal nerve arises from...

Answer 38

C7-T1 (primarily from C8)

Question 39

Thoracodorsal nerve innervates...

Answer 39

Latissimus dorsi

Question 40

Radial nerve arises from...

Answer 40

C7-T2

Question 41

The radial nerve is motor to...

Answer 41

All the extensor muscles of the elbow, carpal and phalangeal joints; also triceps, tensor fasciae antebrachii and anconeus

Question 42

On the lateral side, at the distal 3rd of the arm, the radial nerve terminates as...

Answer 42

A deep and superficial branch

Question 43

The median and ulnar nerves arise from...

Answer 43

A common trunk from C8-T2 (median cranial, ulnar caudal)

Question 44

The common trunk of the median and ulnar nerves lies on...

Answer 44

The medial head of the triceps

Question 45

What nerve leaves the ulnar nerve near the middle of the arm

Answer 45

Caudal cutaneous antebrachial nerve

Question 46

The brachial artery in the forearm gives rise to...

Answer 46

Common interosseous and median artery

Question 47

What are the 3 main branches of the common interosseous

Answer 47

Ulnar, cranial interosseous and caudal interosseous

Question 48

The ulnar artery supplies...

Answer 48

The ulnar and humeral heads of the deep digital flexor and the flexor carpi ulnaris

Question 49

What did we have to transect to expose the caudal interosseous

Answer 49

The pronator quadratus

Question 50

What does the median artery give off

Answer 50

Deep antebrachial and radial artery

Question 51

After the common interosseous, the brachial artery turns into the...

Answer 51

Median artery

Question 52

What is the principle source of blood to the paw

Answer 52

The median artery

Question 53

What did we have to transect to expose the deep antebrachial artery

Answer 53

Humeral head of deep digital flexor

Question 54

What does the deep antebrachial artery supply

Answer 54

Flexor carpi radialis, deep digital flexor, flexor carpi ulnaris, and the superficial digital flexor

Question 55

Arteries of the axillary branch

Answer 55

Ext thoracic, lat thoracic, subscapular (thoracodorsal and caudal circumflex humeral), and cranial circumflex humeral

Question 56

Arteries of brachial branch

Answer 56

Deep brachial, bicipital, collateral ulnar, superficial brachial, common interosseous (cranial inter, caudal inter, and ulnar)

Question 57

Arteries of median branch

Answer 57

Deep antebrachial and radial

Question 58

External thoracic a. muscle

Answer 58

Superficial pectoral

Question 59

Lateral thoracic a. muscle

Answer 59

Deep pectorals, latissimus dorsi, cutaneous trunci

Question 60

Subscapular a. muscle

Answer 60

Subscapularis, teres major

Question 61

Caudal circumflex humeral a. muscle

Answer 61

Deltoideus, coracobrachialis, infraspinatus, triceps

Question 62

Thoracodorsal a. muscle

Answer 62

Latissimus dorsi

Question 63

Deep brachial a. muscle

Answer 63

Triceps

Question 64

Bicipital a. muscle

Answer 64

Biceps brachii, brachialis

Question 65

Superficial brachial a. muscle

Answer 65

Dorsum of forepaw

Question 66

Collateral ulnar a. muscle

Answer 66

Triceps

Question 67

Common interosseous a. muscle

Answer 67

Digital extensor muscles

Question 68

Ulnar a. muscle

Answer 68

Deep digital flexor, flexor carpi ulnaris

Question 69

Caudal interosseous a. muscle

Answer 69

Pronator quadratus

Question 70

Deep antebrachial a. muscle

Answer 70

Flexor carpi radialis, flexor carpi ulnaris, superficial digital flexor, deep digital flexor

Question 71

Median a. muscle

Answer 71

Paw

Question 72

Radial a. muscle

Answer 72

Deep vessel of paw

Question 73

Suprascapular n. origin

Answer 73

C6, C7

Question 74

Suprascapular n. muscle innervation

Answer 74

Supraspinatus, infraspinatus

Question 75

Subscapular n. origin

Answer 75

C6, C7

Question 76

Subscapular n. muscle innervation

Answer 76

Subscapularis

Question 77

Musculocutaneous n. origin

Answer 77

C6, C7, C8

Question 78

Musculocutaneous n. muscle innervation

Answer 78

Coracobrachialis, biceps brachii, brachialis

Question 79

Axillary n. origin

Answer 79

C7, C8

Question 80

Axillary n. muscle innervation

Answer 80

Teres major, teres minor, deltoideus, part of subscapularis

Question 81

Thoracodorsal n. origin

Answer 81

C7, C8, T1

Question 82

Thoracodorsal n. muscle innervation

Answer 82

Latissimus dorsi

Question 83

Radial n. origin

Answer 83

C7, C8, T1, T2

Question 84

Radial n. muscle innervation

Answer 84

Triceps brachii, tensor fasciae antebrachii, anconeous, common digital extensor, lateral digital extensor, supinator, extensor carpi ulnaris, extensor carpi radialis, ulnaris lateralis, abductor digiti I longus

Question 85

Median n. origin

Answer 85

C8, T1, T2

Question 86

Median n, muscle innervation

Answer 86

Pronator teres, flexor carpis radialis, superficial digital flexor, pronator quadratus, 3 head of deep digital flexor

Question 87

Ulnar n. origin

Answer 87

C8, T1, T2

Question 88

Ulnar n. muscle innervation

Answer 88

Flexor carpi ulnaris, ulnar and humeral heads of deep digital flexor