Review of SA forelimb

Question 1

Where do extrinsic muscles originate, and insert?

Answer 1

Neck and thorax

Limb

Question 2

What forms the shoulder joint?

Answer 2

Glenoid cavity of the scapula and the head of the humerus

Question 3

Describe the stability of the shoulder joint

Answer 3

• relatively unstable due to the shape of the bones
• weak/no collateral ligaments
• some support provided by the tendons of insertion of the subscapularis, supraspinatus and infraspinous

Question 4

Which nerve is associated with the musculospiral groove of the humerus?

Answer 4

Radial

Question 5

What are the names of the different heads of the triceps?

Answer 5

Accessory
Long
Lateral
Medial

Question 6

Describe the stability of the elbow joint

Answer 6

• Quite stable but may displace
• Medial and lateral collateral ligaments
• Annular ligament

Question 7

Which joints make up the compound carpal joint?

Answer 7

• Antebrachial joint: between the distal radius and ulna and first row of carpal bones
• Middle carpal joint: between the two rows of carpal bones
• Carpometacarpal joint between the distal carpus and proximal metacarpal bones
• Intercarpal joints

Question 8

Where do the DDF and SDF insert?

Answer 8

DDF = P1
SDF = P2

Question 9

Which spinal nerves supply the brachial plexus?

Answer 9

C6, C7, C8, T1, T2

Question 10

Which selected extrinsic muscles are supplied by the brachial plexus?

Answer 10

• Pectoral muscles
• Latissimus dorsi
• Serratus ventralis

Question 11

Name the order of arteries running down the forelimb

Answer 11

• Subclavian
• Axillary
• Brachial + superficial brachial
• Median
• Radial

Question 12

Which 2 arteries supply the palmar blood supply to the paw?

Answer 12

Median

Caudal interosseous

Question 13

Which artery supplies the dorsal paw?

Answer 13

Superficial brachial