Arteries of Proximal Upper Limb

Question 0

Where does the first part of the axillary artery begin and end?

Answer 0

It begins at the lateral border of the first rib and ends at the medial border of the pectorlais minor.

Question 1

What artery originates from the first part of the axillary artery?

Answer 1

Superior thoracic artery

Question 2

What does the superior thoracic artery supply?

Answer 2

1st and 2nd intercostal spaces and superior part of serratus anterior

Question 3

What are the branches of the second part of the axillary artery?

Answer 3

Thoraco-acromial artery and lateral thoracic artery

Question 4

What are the branches of thoraco-acromial artery?

Answer 4

Pectoral, deltoid, clavicle, and acromion

Question 5

What is the course of the superior thoracic artery?

Answer 5

Runs anteromedial lay along superior border of pectorlais minor then passes between it and pectorlais major to thoracic wall

Question 6

What is the course of the thoraco-acromial artery?

Answer 6

Curls around superomedial border of pectoralis minor, pierces costocoracoid membrane (clavipectoral fascia)

Question 7

What is the course of the lateral thoracic artery?

Answer 7

Descends along axillary border of pectoralis minor

Question 8

What does the lateral thoracic artery supply?

Answer 8

Lateral aspect of breast

Question 9

Where does the second part of the axillary artery begin and end?

Answer 9

Posterior pectorlais minor to lateral border of pectorlais minor

Question 10

What are the branches of the third part of the axillary artery?

Answer 10

Subscapular artery (largest branch of axillary artery), anterior circumflex and posterior circumflex humeral artery

Question 11

Where does the third part of the axillary artery begin and end?

Answer 11

Lateral border of pectorlais minor to inferior border of teres major

Question 12

What is the course of the circumflex humeral arteries?

Answer 12

Encircle surgical neck of humerus while anastomosing with each other laterally (posterior artery is the larger branch and passes through the quadrangular space)

Question 13

What is the course of the subscapular artery?

Answer 13

Descends from level of inferior border of subscapularis along lateral border of scapula; forms terminal branches circumflex scapular artery and thoracodorsal artery

Question 14

What is the origin of the suprascapular artery?

Answer 14

Thryocervical trunk or as a direct branch from the subclavian artery

Question 15

What is the course of the suprascapular artery?

Answer 15

Passes inferolaterally across the anterior scalene, phrenic nerve, subclavian artery, and brachial plexus then runs anteriorly and parallel with clavicle until it passes over the transverse scapular ligament to the supraspinous fossa then lateral to the scapula spine to the infraspinous fossa on the posterior surface of the scapula

Question 16

What is the origin of the internal thoracic artery?

Answer 16

Inferior surface of first part of subclavian artery

Question 17

What is the origin of the thyrocervical trunk?

Answer 17

Anterior surface of first part of subclavian artery