Lecture - 11 Pectoral Region and Axilla Flashcards
Most inferior rib cartilage to articulate with sternum
7th costal cartilage
75% of lymphatic drainage of breast goes where
Axillary lymph nodes
Loose connective tissue in the breast that allows for some movement
retromammary space
Contents of axilla
- Axillary artery and its branches
- Axillary vein and its tributaries
- Axillary lymph nodes and lymph vessels
- Parts of the brachial plexus of nerves
- Axillary sheath of fascia enclosing the major nerves and blood vessels
Border of axilla
Apex:
convergence of the clavicle, scapula, and first rib; this is the entrance to the axilla
Border of axilla
Base:
formed by axillary fascia
Border of axilla
Anterior wall:
consisting of the pectoralis major and pectoralis minor and associated fasciae
Border of axilla
Medial wall:
formed by the chest wall covered by the serratus anterior
Border of axilla
Posterior wall:
formed by the scapula and scapular muscles
Border of axilla
Lateral wall:
formed by the intertubercular groove of the humerus; the tendon of the long head of the biceps brachii traverses the intertubercular groove
Beginning and ending of axillary artery from subclavian artery occurs where
Axillary artery begins at lateral border of 1st rib, ends at inferior border of teres major
3 parts of the axillary artery
1st part:
(What artery comes out from it?)
First: Medial to the pectoralis minor
One arterial branch
(Superior thoracic artery)
3 parts of the axillary artery
2nd part:
(What arteries come out from it?)
Second: Posterior to the pectoralis minor
Two arterial branches
(Thoracoacromial artery
Lateral thoracic artery)
3 parts of the axillary artery
3rd part:
(What arteries come out from it?)
Lateral to the pectoralis minor Three arterial branches (Subscapular artery Anterior circumflex humeral Posterior circumflex humeral)
