Lab Review Thoracic Limb

Question 1

What is the purpose of the dorsoscapular ligment?

Answer 1

Concussion

Question 2

What two muscles attach the trees major tubercle on humerus?

Answer 2

Teres major and Latissimus dorsi

Question 3

What makes up the cephalic groove?

Answer 3

Laterally the brachiocephalicus and medially the descending pectoral

Question 4

Axillary lymph center infection may result in?

Answer 4

lack of panniculus reflex- the lymph center is adjacent to the lateral thoracic nerve

Question 5

Brachial plexus formed by?

Answer 5

last three cervical and first two thoracic ventral branches of the spinal cord

Question 6

Ansa axillaris composed of? encircles?

Answer 6

Median and musculocutaneous nerves, the axillary artery

Question 7

What is sweeney?

Answer 7

Suprascapular nerve damage- from heavy working collar or from stopping short and pulling out the nerve. Symptoms include a prominent scapular spine, unstable lateral aspect of the shoulder joint, resulting in abduction. Unsafe to ride.

Question 8

Structures in carpal canal (equine)

Answer 8

1) Tendon of DDF
2) Tendon of SDF
3) Medial palmar a.
4) Medial palmar n.

Question 9

Structures in the flexor retinaculum (equine)

Answer 9

1) Tendon of FCR with own synovial sheath
2) Radial Vein
3) Radial Artery
4) Lateral Palmar A.
5) Lateral Palmar V.
6) Lateral Palmar N.

Question 10

How do you inject the shoulder joint?

Answer 10

Palpate the point of shoulder- greater tuberosity, and the tendon of insertion of infraspinatus, place needle above the point of shoulder and in front of infraspinatus.

Question 11

Why is the bicipital bursa difficult to inject?

Answer 11

Overalapped by the brachiocephalicus muscle

Question 12

Axillary nerve supplies which 6 muscles?

Answer 12

Subscapularis 
Teres Major
Teres Minor
Deltoideus
Cliedobrachialis 
Articularis Humeri

Question 13

Where does the axillary nerve terminate in horses?

Answer 13

At the level of carpus- in all other animals it goes to the digits

Question 14

Why won’t you see cutaneous deficits if the horse loses its radial nerve?

Answer 14

Overlap between the radial nerve and the axillary nerve

Question 15

Four structures separating the long and short parts of the coracobrachialis

Answer 15

1) proximal muscular branch of musculocutaneous n.
2) cranial circumflex humeral vein and a
3) tendon of insertion of trees major

Question 16

Palpating lacertus fibrosis will allow you to feel what nerve?

Answer 16

Termination of musculocutaneous n.

Question 17

Collecting lymph node for thoracic limb in horses?

Answer 17

Cubital lymph nodes

May irritate median nerve if infected- no sensory deficits

Question 18

Where does the ulnar nerve run on the ante brachium?

Answer 18

between ulnar head and humeral head of FCU

Question 19

SDF radial head=

Answer 19

proximal check ligament

Question 20

How to preform an ulnar nerve block

Answer 20

palpate the accessory carpal- go a hand breadth above that point. feel ulnar nerve in space between UL and FCU (no clear point in doing this…)

Question 21

Accessory ligament of the DDF=

Answer 21

distal check ligament

Question 22

Thoracic limb vs. pelvic limb distal limb blood supply

Answer 22

Thoracic= medial palmar artery 
Pelvic= dorsal metatarsal a. on lateral aspect of limb

Question 23

Thoracic limb vs. pelvic limb medial palmar/plantar n. course

Answer 23

Thoracic limb= runs between SDF and DDF

Pelvic limb= runs between suspensory lig and DDF

Question 24

What is hygroma?

Answer 24

Bump on knee formed when extensor tendon sheath becomes herniated when horse falls

Question 25

Why are medial splint problems more common than lateral splint problems?

Answer 25

Weight axis more towards medial aspect
Articular table on medial side is higher, get hit first
carpal 2 articulates entirely with mc 2, while carpal 4 articulates equally with MC 3 ad MC 4 - more even weight distribution