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AAAC33 21/5/05 10:50 AM Page 76
33 The axilla

Pectoralis minor
Pectoralis major
Short head of biceps
Trapezius Coracobrachialis
Clavicle

Subclavius Long head Lateral cord
of biceps Axillary artery
Clavipectoral
(tendon) Medial cord
fascia
Axillary vein
Axillary space Posterior cord
Latissimus
Pectoralis
minor dorsi (tendon)
Chest wall
Pectoralis
major
Fascial floor
of axilla
Serratus anterior
Subscapularis
Fig.33.1
Vertical and horizontal sections through the axilla; the planes of the sections are shown in the central diagram

C5

Cephalic vein C6
Lateral cord
C7
Thoracoacromial artery C8
Lateral pectoral
T1
Axillary artery
Axillary vein
Medial pectoral

Musculocutaneous
Medial cord
Lateral thoracic artery
Medial cutaneous
of arm

Pectoralis minor

Medial cutaneous
Median
of forearm
Ulnar

Radial
Fig.33.2
The main contents of the axilla from the front.
The posterior cord is hidden behind the axillary artery

76 Upper limb