Axilla - Anatomical Spaces & Miscellaneous

Question 1

Walls of the Axilla

Answer 1

Apex - cervico-axillary canal

Base - skin, subcutaneous tissue, deep fascia

Anterior wall - pec minor and major, clavipectoral fascia, anterior axillary fold

Posterior wall - scapula and subscapularis muscle, posterior axillary fold

Question 2

Triangular space - borders and contents

Answer 2

Borders - long head of the triceps (lateral), teres minor (superior), teres major (inferior)

Contents (1) - circumflex scapular artery

Question 3

Triangular interval/hiatus - borders and contents

Answer 3

Borders - long head of the triceps (medial), humerus (lateral), teres major (superior)

Contents (2) - profunda brachii (deep bracial) artery, radial nerve

Question 4

Quadrangular space - borders and contents

Answer 4

Borders - surgical neck of the humerus (lateral), long head of the triceps (medial), teres minor (superior), teres major (inferior)

Contents (2) - posterior humeral circumflex artery, axillary nerve

Question 5

Triangle of Auscultation - borders

Answer 5

latissimus dorsi, trapezius, scapula

(6th and 7th ribs and 6th rib space are exposed)

Question 6

What are the arteries involved in the scapular anastomosis? (3)

Answer 6

suprascapular artery (with infraspinous branch)

circumflex scapular artery

dorsal scapular artery

Question 7

What mm seperates triangular from quadrangular space

Answer 7

long head of triceps brachii