Forelimb

Question 1

What is the brachial plexus and where is it found?

Answer 1

• Found in the axilla (medial to shoulder joint)
• Formed by ventral rami of spinal nerves
• Supplies majority of muscles, skin ad other sensitive structures of the forelimb

Question 2

What is the rule about cutaneous innervation for a nerve?

Answer 2

The cutaneous innervation for a nerve is distal to the muscles supplied by the same nerve.

Question 3

What is the axillary nerve’s motor and sensory function?

Answer 3

Motor: to shoulder flexors (teres major, deltoideus) and to teres minor

Sensory: to the skin of the lateral distal brachium

Question 4

What is the radial nerve’s motor and sensory function?

Answer 4

Motor: to all extensors of the elbow, carpus and digits

Sensory: to the dorsolateral aspect of the antebrachium, and dorsal carpus and digits *not in horses though*

Question 5

What is the muculocutaneous nerve’s motor and sensory function?

Answer 5

Motor: to elbows flexors: biceps brachii, brachialis and corobrachialis

Sensory: to the antebrachial skin

Question 6

Which two nerves in the forelimb can be considered a functional unit?

Answer 6

Median and ulnar nerves

Question 7

What are the median and ulnar nerves’ sensory and motor functions?

Answer 7

Motor: to all flexors of the carpus and digits

Sensory - ulnar: caudal aspect of the antebrachium

Sensory - median and ulnar: sensation to skin of lateral, palmar digits.

Question 8

1

Answer 8

Extensor carpi radialis

Question 9

2

Answer 9

Common digital extensor

Question 10

3

Answer 10

Lateral digital extensor

Question 11

4

Answer 11

Ulnaris lateralis

Question 12

5

Answer 12

Flexor carpi ulnaris

Question 13

6

Answer 13

Abductor digiti I longus

Question 14

7

Answer 14

Extensor retinaculum

Question 15

8

Answer 15

Carpal pad

Question 16

Which nerve supplies 1, 2 and 3?

Answer 16

Radial nerve

Question 17

1

Answer 17

Anconeus

Question 18

2

Answer 18

Brachialis

Question 19

3

Answer 19

Deltoid tuberosity of the humerus

Question 20

4

Answer 20

Extensor carpi radialis

Question 21

5

Answer 21

Lateral digital extensor

Question 22

6

Answer 22

Abductor digiti I longus

Question 23

7

Answer 23

Ulnaris lateralis

Question 24

8

Answer 24

Ulnar head of the deep digital flexor

Question 25

9

Answer 25

Accessory carpal bone

Question 26

10

Answer 26

Interosseous

Question 27

11

Answer 27

Extensor branch of the interosseous

Question 28

1, 2

Answer 28

Roots of the brachial plexus

Question 29

4

Answer 29

Suprascapular nerve

Question 30

5

Answer 30

Musculocutaneous nerve

Question 31

7

Answer 31

Subscapular nerve

Question 32

11

Answer 32

Axillary nerve

Question 33

12

Answer 33

Radial nerve

Question 34

13

Answer 34

Ulnar nerve

Question 35

16

Answer 35

Median nerve

Question 36

1

Answer 36

Sternocephalicus

Question 37

2

Answer 37

Brachiocephalicus (cleidocephalicus part)

Question 38

2’

Answer 38

Brachiocephalicus (cleidobrachialis part)

Question 39

3

Answer 39

Omotransversarius

Question 40

5

Answer 40

Cervical part of the trapezius

Question 41

5’

Answer 41

Thoracic part of the trapezius

Question 42

6

Answer 42

Deltoideus

Question 43

7

Answer 43

Latissimus dorsi

Question 44

8

Answer 44

Long head of triceps

Question 45

8’

Answer 45

Lateral head of triceps

Question 46

9

Answer 46

Pectoralis profundus