Pectoral Region and Axilla

Question 1

What are suspensory ligaments?

Answer 1

Act as walls to separate breast into 115-20 lobes that contain milk glands

Question 2

What three arteries provide blood supply to the mammary glands?

Answer 2

Interntal Thoracic

Lateral Thoracic

Pectoral branch of the Thoracoacromial

Question 3

Describe the lymphatic drainage of the mammary gland and its clinical significance.

Answer 3

Pectoral nodes drain 75% (lateral breast)

Parasternal nodes drain the remaining (medial breast)

Plays a major role in the metastasis of cancer cells

Question 4

What is winged scapula?

Answer 4

Medial border and inferior angle of the scapula thrust posteriorly when the patient pushes hand against the wall

Results from damage to the Long Thoracic Nerve

Serratus anterior no longer holds scapula to thoracic wall

Question 5

What is the function of the clavipectoral fascia?

Answer 5

Surrounds the pec minor and subclavius

Protests the underlying nerves of the brachial plexus and axillary vessels

Question 6

What structures pierce the Clavipectoral Fascia above the pec minor?

Answer 6

Cephalic vein

Thoracoacromial artery

Lateral pectoral nerve

(Medial Pectoral Nerve pierces the pec minor)

Question 7

What are the borders of the clavopectoral triangle?

Answer 7

Deltoid

Pectoralis major

Clavicle

Question 8

What is the only major structure that passes directly through the medial wall into the axilla?

Answer 8

Intercostobrachial nerve

Question 9

What are the contents of the axilla?

Answer 9

Nerves of the brachial plexus

Axillary artery

Axillary vein

They are all contained within and axillary sheath

Question 10

What are the branches of the Axillary artery in order?

Answer 10

Superior Thoracic

Thoracoacromial

Lateral Thoracic

Subscapular

Anterior Circumflex Humeral

Posterior Circumflex Humeral