Axilla region

Question 1

Borders of the axilla

Answer 1

Apex

• Lateral border of first rib
• Superior border of scapula
• Posterior border of clavicle

Lateral wall

• Humerus

Medial wall

• Serratus anterior
• Thoracic wall

Anterior wall

• Pectoralis major and minor
• Subclavis

Posterior wall

• Subscapularis
• Teres major
• Latissimus dorsi

Question 2

Contents of the axilla

Answer 2

• Axillary artery and vein
• Brachial plexus
• Biceps and coracobrachialis tendon
• Axilary limphnodes

Question 3

What are the borders and contents of the quadrangular space?

Answer 3

Borders:

Medial - long head of triceps

Lateral - humoral shaft

Superior - teres minor

Inferior - teres major

Contains:

• Axillary nerve
• Posterior circumflex humeral artery

Question 4

What are the borders and contents of the triangular space?

Answer 4

Borders:

Lateral - long head of triceps

Inferior - teres major

Superior - teres minor

Contents:

• Scapular circumflex artery

Question 5

What are the borders and contents of the triangular interval?

Answer 5

Borders:

Lateral - lateral head of triceps OR humerus

Medial - long head of triceps

Superior - teres major

Contents:

• Deep brachial artery
• Radial nerve

Question 6

What are the borders and the contents of the clavipectoral triangle?

Answer 6

Borders:

• Pectoralis major
• Deltoid
• Clavicle

Contents:

• Cephalic vein
• Medial and lateral pectoral nerves