Short notes on anatomy of the Axilla and special structures of the upper limb

DocGuy




ANATOMY
Medicine Made Simple

, Axilla
Definition

 Pyramidal shaped region situated between the upper part of arm and side of chest wall.

Boundaries

 Apex - truncated & bounded by,
Clavicle-upper border
Scapula-superior border
1st rib-outer border
- directed towards root of neck
- Also known as cervicoaxillary canal




 Base - directed downwards
- Skin, axillary fascia

 Anterior wall - Pec. major
- clavipectoral fascia enclosing subclavius
and pec. minor

 Pos. wall - Subscapularis
- Teres Major
- Lat. Dorsi

 Ant & post walls converge laterally.
 Lat. Wall - upper part of the shaft of the humerus
- coracobrachialis, short head of biceps
 Med. Wall - upper 4 ribs, their intercostal muscles
- Serratus ant.

Contents of the Axilla
 Axillary artery and its branches
 Axillary vein and its tributaries
 Infraclavicular part of the brachial plexus
 5 groups of axillary lymph nodes and
associated lymphatics




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