Flashcards in MSK Session 2- The Axilla Region Deck (25)
Where is the axilla located?
Inferior to the glenohumeral joint.
What is the purpose for the axilla?
It is a passageway for neurovascular structures between the upper limb and the thorax.
What happens to the size and vulnerability of the axilla as abduction increases?
The size of the axilla decreases, but it becomes more exposed and vulnerable.
What forms the apex border? (3)
The inferior portion of the clavicle
The superior scapula
The lateral border of the 1st rib
What forms the base border? (2)
Axillary fascia and skin of the armpit
What forms the anterior border? (2)
What forms the posterior border? (3)
What forms the medial border? (3)
What forms the lateral border?
Intertubercular groove of the humerus.
What are the four content of the axilla?
Axillary lymph nodes
What is the axillary artery a continuation of and what does it become? (Indicate when these changes occur)
It is a continuation of the subclavian artery.
Becomes the axillary artery at the lateral border of the first rib.
It becomes the brachial artery at the inferior border of teres major.
What are the two main tributaries of the axillary vein?
The basilic and cephalic veins
What is axillary node enlargement an indicator of?
What is axillary clearance and why is it performed?
It is removal of the axillary lymph nodes.
It is performed in some patients diagnosed with breast cancer because 75% of Breast Lymph drains into axillary lymph.
What may be injured during axillary clearance and what can this lead to?
The long thoracic nerve
Which cord does the superior trunk give rise to in the brachial plexus?
The lateral cord
Which cord does the middle trunk give rise to?
Which cord does the inferior trunk give rise to?
Which cord does the musculocutaneous nerve arise from?
Which cords does the median nerve arise from?
The lateral and medial cords.
Which cord does the axillary nerve arise from?
Which cord does the radial nerve arise from?
Which cord does the ulnar nerve arise from?
Which three nerves of the brachial plexus form an 'M' and which structure do they form it around?
Musculocutaneous, median and ulnar nerves
Around the brachial artery.