Axilla, Brachial Plexus and Arm

Question 1

Flashcard 1
Q: What is the axilla?

Answer 1

A: The axilla is a pyramidal space inferior to the glenohumeral joint and superior to the axillary fascia at the junction of the arm and thorax.

Question 2

Flashcard 2
Q: What is the role of the axilla?

Answer 2

The axilla serves as a “distribution center” protected by the adducted upper limb for the neurovascular structures serving the upper limb.

Question 3

Flashcard 3
Q: What does the axilla communicate with?

Answer 3

: The axilla communicates with the posterior triangle of the neck.

Question 4

Flashcard 4
Q: What forms the apex of the axilla?

Answer 4

: The apex of the axilla is the cervico-axillary canal, bounded by the first rib, clavicle, and superior edge of the scapula. Neurovascular bundles pass through this superior opening.

Question 5

Flashcard 5
Q: What forms the base of the axilla?

Answer 5

The base of the axilla is formed by the concave skin, subcutaneous tissue, and axillary fascia, extending from the arm to the thoracic wall (approximately at the 4th rib level), forming the axillary fossa (armpit).