Peripheral Nerves (JD+MO)

Question 1

What is the enlargement of the spinal cord that serves the thoracic limb via brachial plexus?

Answer 1

Cervicothoracic enlargement

Question 2

Describe the limits of the cervicothoracic enlargement

Answer 2

C6-T2

Question 3

The _______________ enlargement serves the pelvic limbs via the lumbosacral plexus

Answer 3

lumbosacral

Question 4

What is the range of the lumbosacral enlargement?

Answer 4

L4-S3

Question 5

What is the innervation of the muscles of the scapular spine?

Answer 5

Suprascapular nn

Question 6

Subscapular n innervates what joint?

Answer 6

Shoulder joint

Question 7

Muscles caudal to shoulder joint are innervated by which nerve? I.e: flex shoulder

Answer 7

Axillary n

Question 8

The radial nerve innervates which muscle groups?

Answer 8

Cranial antebrachium and caudal brachium (elbow extension and carpal extensors)

Question 9

Which nerves are associated with the muscles of the caudal antebrachium?

Answer 9

Median and ulnar nn

Question 10

The nerve that innervate the cutaneous trunci is the ___________________

Answer 10

lateral thoracic n

Question 11

The lattisimus dorsi inserts at the:

Answer 11

Teres major tuberosity

Question 12

What nerve innervates the lattisimus dorsi?

Answer 12

thoracodorsal n

Question 13

The femoral n innervates which muscle groups?

Answer 13

Cranial hip and femoral

Question 14

The medial femoral region is innervated by the __________________ n.

Answer 14

Obturator n

Question 15

The sciatic n innervates which muscle groups?

Answer 15

Caudal hip and caudal femoral

Question 16

What is the nerve that innervates the cranial crural region?

Answer 16

Common fibular n

Question 17

The tibia n innervates which muscle region?

Answer 17

Caudal crural

Question 18

Where do the most notable changes occur for nerves?

Answer 18

After the carpus down to the digit

Question 19

List 3 clinical significances of knowing nerves

Answer 19

• lameness detection
• nerve blocks
• local anesthesia and sx

Question 20

Describe the branches of the spinal nerves in the cervicothoracic enlargement

Answer 20

ventral branches of cervical and thoracic spinal nerves

Question 21

The lateral surface of the thoracic limb is innervated by which nerve?

Answer 21

Radial n

Question 22

From carpus to fetlock, what innervates that area laterally?

Answer 22

dorsal branch of ulnar nerve

Question 23

Which nerve innervates from fetlock to digit laterally?

Answer 23

Lateral palmar digital n

Question 24

Which nerve, through the medial cutaneous antebrachial n, innervates the medial surface of the limb until the fetlock in the thoracic limb?

Answer 24

Musculocutaneous n

Question 25

The medial palmar digital n innervates which area?

Answer 25

Fetlock to digit medially

Question 26

The median n (medial/lateral palmar) is formed before where?

Answer 26

before entering the carpal canal

Question 27

List the 2 branches of the ulnar n

Answer 27

- palmar - dorsal

Question 28

Which branch of the ulnar n splits into medial/lateral palmar metacarpal n?

Answer 28

deep branch of the ulnar n

Question 29

In bovine, describe the communicating branches in the palmar aspect.

Answer 29

Communicating branch is between ulnar n and median n lateral branch

Question 30

In the bovine, which nerve supplies the dorsal aspect of the thoracic limb?

Answer 30

Radial n

Question 31

List the 2 branches of the radial nerve in bovine

Answer 31

- Dorsal common digital nerve II and III

Question 32

What is the the branch of the ulnar n that supplies the bovine dorsal limb?

Answer 32

dorsal common digital n IV

Question 33

What nerve passes through the carpal canal in equine?

Answer 33

Ulnar n

Question 34

A hyperextension of the equine digit with "kiss hand attitude" may indicate a lesion in which nerve?

Answer 34

Radial n

Question 35

A lesion in the brachial plexus may show signs such as:

Answer 35

- total sensory loss/motor function of TL - peripheral/central lesion

Question 36

In a palmar digital (PD) block, what area are you blocking?

Answer 36

Hoof (caudal 1/3) and heel

Question 37

After you perform a PD block with no evidence of improvement, what is the next block you would try?

Answer 37

Abaxial sesamoidean

Question 38

What blocks fetlock down?

Answer 38

Low 4 pt block

Question 39

Describe what blocks from proximal MC/MT down

Answer 39

High 4 point

Question 40

What innervates the structures of the pelvis, hip, perineum, and Hindlimb?

Answer 40

Lumbosacral plexus - ventral branches of lumbar and sacral nerves

Question 41

Define paresis

Answer 41

partial nerve damage

Question 42

Define paralysis

Answer 42

total loss of control

Question 43

What nerve supplies the dorsal pes?

Answer 43

common fibular n with superficial branch and a deep branch with medial and lateral dorsal metatarsal branches

Question 44

Which branch of the common fibular nerve terminates at the fetlock in the hind limb?

Answer 44

Superficial branch

Question 45

T/F there are digital branches in the radial and common fibular nerve

Answer 45

False

Question 46

What are the terminal branches of the deep fibular nerve?

Answer 46

Medial and lateral dorsal metatarsal nerves

Question 47

Describe what is the main nerve supply to the fetlock joint and the dorsum of the digit

Answer 47

Dorsal metatarsal nerves

Question 48

What accompanies the lateral dorsal metatarsal nerve ?

Answer 48

Dorsal metatarsal a.

Question 49

Which nerve supplies the plantar pes?

Answer 49

Tibial n with medial and lateral plantar branches

Question 50

Which branch of the tibial n gives off a deep branch with medial/lateral plantar Metatarsal nerves?

Answer 50

lateral plantar n, deep branch

Question 51

In bovine the lateral plantar n gives off what branches?

Answer 51

Interossei branches (medial and lateral plantar MT n)

Question 52

In common fibular n paralysis, what muscles are motor affected?

Answer 52

Extensor mm (sup and deep branches)

Question 53

Describe the sensory effect seen in paralysis of the common fibular n

Answer 53

superficial dorsum of the pes is affected