Axilla

Question 0

What is the base of the axilla?

Answer 0

the base is formed by the concave skin, subcutaneous tissue, and axillary (deep) fascia extending from the arm to the thoracic wall forming the axillary fossa (armpit)

Question 1

What makes up the apex of the axilla?

Answer 1

It is the cervico-axillary canal. It is bounded by the first rib, clavicle, and superior edge of the scapula. (the arteries, veins, lymphatics, and nerves traverse this opening to pass or from the arm.

Question 2

What comprises the anterior wall of the axilla?

Answer 2

the anterior wall is formed by the pecctoralis major and minor and the pectoral and clavipectoral fascia associated with them. The anterior axillary fold is the inferiormost part of the anterior wall

Question 3

What comprises the posterior wall of the axilla?

Answer 3

-the posterior wall is formed chiefly by the scapula and subscapularis on its anterior surface and inferiorly by the teres major and latissimus dorsi. The posterior axillary fold is the inferiormost part of the posterior wall that may be grasped

Question 4

What comprises the medial wall of the axilla?

Answer 4

the medial wall is formed by the thoarcic wall and the overlying serratus anterior

Question 5

What comprises the lateral wall of the axilla?

Answer 5

the lateral wall is the narrow bony wall formed by the intertubecular sulcus of the humerus

Question 6

What is contained in the axilla?

Answer 6

the axilla contains the axillary artery and its branches, axillary vein and its tributaries, nerves of the cords and braches of the brachial plexus, lymphatic vessels, and several groups of axillary lymph nodes, all embedded in axillary fat.

Question 7

What encloses the neurovascular structures passing through the axilla and what is it made out of?

Answer 7

the neurovascualr structures are ensheathed in a sleeve-like extension of the cervical prevertebral fascia, the axillary sheath.