UNFINISHED Anatomy of the Shoulder and Elbow

Question 1

Where does the axillary artery begin? Which artery is it a continuation of?

Answer 1

Lateral border of 1st rib

Continuation of subclavian a.

Question 2

Which arteries supply the shoulder and upper limb? Where do they begin and what part of the limb do they supply?

Answer 2

1. Axillary - begins at lateral border of 1st rib, supplies shoulder
2. Brachial: begins at inferior border of teres major, supplies arm
3. Radial and Ulnar: begin at the distal part of the cubital fossa, supply forearm

Question 3

Describe the general innervation of the shoulder and upper limb

Answer 3

Axillary nerve - shoulder

Musculocutaneous nerve - flexor muscles of arm

Radial nerve - extensors of forearm and arm

Median nerve - flexor muscles of forearm

Ulnar nerve - medial forearm and hand muscles

Question 4

What actions can the trapezius perform at the scapula?

Answer 4

Elevation, depression and retraction

Question 5

What is the action of the latissimus dorsi at the shoulder? Where do the lats insert?

Answer 5

Adduction and internal rotation

• Intertubercular groove of humerus

Question 6

What are the three parts of the deltoid and what actions does each part produce?

Answer 6

Anterior (clavicular) part: flexion and internal rotation of the arm,

Middle (acromial part): abduction of the arm beyond the initial 15°

Posterior (spinal part): extension and external rotation of the arm