Large animal Thoracic limb vessels and nerves

Question 1

Median a. changes to ______ at carpus

Answer 1

medial palmar a.

Question 2

Medial palmar a.

Answer 2

main blood supply to the digit, divides to form palmar digital a. Just proximal to the fetlock

Question 3

Medial palmar digital a.

Answer 3

on abaxial surface of proximal sesamoid bones, terminates as the terminal arch

Question 4

Lateral palmar digital a.

Answer 4

on abaxial surface of proximal sesamoid bones terminates as the terminal arch

Question 5

Gives major blood supply to digit

Answer 5

medial palmar a.

Question 6

Median n. splits at level of carpus into…

Answer 6

• medial palmar n.

- Lateral palmar n.

Question 7

Lateral palmar n.

Answer 7

connects med & lat palmar n. at level of the mid-metacarpal bone

Question 8

Median n. change at the level of the fetlock…

Answer 8

Medial palmar digital n. & lateral palmar digital n.

Question 9

Deep br. of lateral palmar n. (@level of carpus)

Answer 9

dives into suspensory ligament, just palmar to MCIII

Question 10

Medial palmar metacarpal n.

Answer 10

close association w/ axial surface of splint bone (2nd metacarpal)

Question 11

Lateral palmar metacarpal n.

Answer 11

close association w/ axial surface of splint bone (4th metacarpal)

Question 12

Nerve name change at fetlock

Answer 12

medial and lateral palmar n. -> med/lat palmar DIGITAL n.

Question 13

Median nerve splits at the carpus into….

Answer 13

medial and lateral branches

Question 14

Ulnar nerve splits at the carpus into…

Answer 14

palmar and dorsal br.

Question 15

Palmar br. of ulnar n. joins lateral br. of median n. to form…

Answer 15

lateral palmar n.

Question 16

Ulnar n.

Answer 16

• like dog: found b/t medial humoral epicondyle and tuber olecranon
• supplies cutaneous innervation to distal medial aspect of the brachium and caudal aspect of the antecrachium
• bifurcates just above the carpus

Question 17

Dorsal br. of ulnar n.

Answer 17

to skin-Lat/Dor metacarpal area

Question 18

Palmar br. of ulnar n.

Answer 18

joins w/ lat br. of the median n. to form the lateral palmar n.

Question 19

Minimal innervation to ____ aspect of front limb by cutaneous nerves only

Answer 19

dorsal

Question 20

What nerve is likely damaged in a cat knuckling, preventing extension of the carpus and digits?

Answer 20

radial n.

Question 21

Musculocutaneous n. action

Answer 21

flexes elbow (biceps)

Question 22

Axillary n. action

Answer 22

flex the shoulder

Question 23

Median and ulnar n. action

Answer 23

flex carpus and digits

Question 24

What nerve is likely damaged in a horse resulting in the muscle atrophy referred to as “Sweeny”?

Answer 24

Suprascapular n.

Question 25

In a dog: which artery may be seen coursing toward the axillary lymph node, supply the deep pectoral, and travel w/ a nerve of the same name?

Answer 25

Lateral thoracic n.

Question 26

A dog sustained an injury to the dorsal aspect of his antebrachium. You poke his paw with a pin and determine that he has no sensation to the dorsal aspect of his paw over digits 1-4. Sensory branches of what nerve have likely been damaged?

Answer 26

Radial nerve (under lateral belly of triceps)

Question 27

Diagnostic nerve blocks

Answer 27

work from most distal towards proximal