Flashcards in Axilla Deck (7)
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1
Describe the four walls of the axilla
4 walls, apex and base
Base: axillary fascia and skin (armpit)
Apex: cervicoaxillary canal
Anterior wall: pectoralis major and minor
Posterior wall: subscapularis muscle (anterior surface of scapula) + teres major and latissimus dorsi
Lateral wall: humuerus, bicipital groove
Medial wall: serratus anterior (over upper 4-5 ribs)
2
Describe the cervicoaxillary canal and its borders
Aperture of the axilla. Most structures which pass between the neck and upper extremity go through the cervicoaxillary canal
Borders:
Anterior, clavicle
Posterior, scapula
Medial, 1st rib
3
Broadly, what are the contents of the axilla
Great vessels and nerves of the upper extremity, surrounded by loose connective tissue
Vessels and nerves enclosed with the *axillary sheath*
- Axillary artery and vein
- Brachial plexus (medial lateral posterior cords)
- Intercostobrachial nerve
- Long thoracic nerve (part of brachial, 5-7th)
- Axillary lymph node groups
4
What are the 3 portions of the axillary artery defined by
Relationship to pectoralis minor:
Superior, posterior, and inferior to.
5
At what point does the subclavian artery become the axillary artery
At the lateral edge of the 1st rib
6
At what point does the axillary artery become the brachial artery
At the lower margin or teres major
7