Axillary Anatomy Question And Answers

Axilla Question And Answers

Question 1. What is axilla and what are its boundaries and contents?
Answer:

• Axilla or armpit is a four side pyramidal space located between the upper part of the arm and chest wall.
• It has apex, base, anterior, posterior, medial, and lateral walls.

Axilla Apex:

• It is directed upwards and medially towards the root of the neck.
• It is truncated, not pointed.
• Axillary artery and brachial plexus enters the axilla through the apex and the passage is called cervicoaxillary canal.

Axilla Base:

• It is directed downwards.
• It is formed by skin, superfiial fascia, and axillary fascia.

Axilla Anterior wall:

• It is formed by:
  • Pectoralis major in front
  • Clavipectoral fascia enclosing pectoralis minor and subclavius deep to pectoralis major muscle

Posterior wall:

• It is formed by:
  • Subscapularis above
  • Latissimus dorsi and teres major below

Axilla Medial wall:

• It is formed by:
  • 1st to 4th ribs and their intercostal muscles
  • Upper part of serratus anterior muscle

Axilla Lateral wall:

• It is very narrow
• It is formed by:
  • Upper part of the shaft of the humerus
  • Short head of biceps brachi and coracobrachialis

Read And Learn More: Anatomy Question And Answers 

• Contents
  • Axillary artery and its branches
  • Axillary vein and its tributaries
  • Part of brachial plexus below clavicle
  • Five groups of axillary lymph nodes and associated lymphatics
  • Long thoracic and intercostobrachial nerves
  • Axillary fat and areolar tissue

Axilla Multiple Choice Question

Question 1. Which of the following forms the anterior fold of the axilla?

1. Pectoralis major
2. Pectoralis major and pectoralis minor
3. Pectoral muscles and subclavius
4. Clavipectoral fascia

Answer: 1. Pectoralis major