The Axilla
,Location and borders
• It’s the pyramidal space between the upper thoracic wall and the a
• It borders with
the pectoralis minor and major (anterior wall)
The scapula and latissimus dorsi and teres major (posterior wall)
Thoracic wall – 1st to 4th ribs as well as the intercostal muscles and
serratus anterior (medial wall)
The intertubercular sulcus in the humerus (lateral wall)
, Axillary artery
• It begins at the lateral border of the 1st rib as a continuation of the
subclavian artery and ends at the inferior border of the teres major
• It passes posterior to the pectoralis minor into the arm and then
becomes the brachial artery when it passes distally to the inferior
border of the teres major.
,Location and borders
• It’s the pyramidal space between the upper thoracic wall and the a
• It borders with
the pectoralis minor and major (anterior wall)
The scapula and latissimus dorsi and teres major (posterior wall)
Thoracic wall – 1st to 4th ribs as well as the intercostal muscles and
serratus anterior (medial wall)
The intertubercular sulcus in the humerus (lateral wall)
, Axillary artery
• It begins at the lateral border of the 1st rib as a continuation of the
subclavian artery and ends at the inferior border of the teres major
• It passes posterior to the pectoralis minor into the arm and then
becomes the brachial artery when it passes distally to the inferior
border of the teres major.
