12 Anatomical Spaces (Axilla)

Question 1

What are the 6 boundaries of the axilla?

Answer 1

Apex: cervicoaxillary canal (passage between neck and axilla, bounded by 1st rib, clavicle, and superior edge of scapula)

Base: skin, subcutaneous tissue, axillary fascia

Anterior wall: pec major, pec minor, deep fascia

Posterior wall: scapula, subscapularis, teres major, lat dorsi

Medial wall: 1-4 ribs, intercostal muscles 1-4, serratus anterior

Lateral wall: intertuburcular groove

Question 2

What are the contents of the axilla?

Answer 2

1. axillary artery and branches
2. axillary vein and tributaries
3. axillary lymph vessels and nodes
4. cords of the brachial plexus and branches
5. fat