Mediastinum (divisions and content)

Question 1

Identify these mediastinum

Answer 1

Question 2

List Superior Mediastinal Boundaries

Answer 2

• Superior thoracic inlet
  
  • Ribs 1 & Manubrium
• Bodies of T2-4 vertebrae
• Pleurae
• Thoracic plane
  
  • Sternal angle – IV disc T4/5

Question 3

Contents of Superior Mediastinum (vessels) (1)

Answer 3

• Superior vena cava
  
  • Brachiocephalic vv.
  • Azygos v.
• Arch of aorta
  
  • Brachiocephalic trunk
  • Left common carotid a.
  • Left subclavian a.
• Ligamentum arteriosum
• Pulmonary arteries (bifurcation of trunk)

Question 4

Contents of Superior Mediastinum (organs) (2)

Answer 4

• Thymus gland
• Trachea
• Esophagus

Question 5

Contents of Superior Mediastinum (nerves) (3)

Answer 5

• Vagus nn. (CN X) & Left recurrent laryngeal n.
• Cardiac plexuses
• Cardiac nn. (sympathetics)
• Phrenic nn

Question 6

Contents of Superior Mediastinum (lymph nodes) (4)

Answer 6

• Thoracic duct
• Lymph nodes & Bronchomedistinal trunk

Question 7

Identify

Answer 7

Question 8

Describe the pericardium.

Answer 8

• Two layers
  
  • Fibrous pericardium
  • Serous pericardium
    
    • Parietal layer
    • Visceral layer

Question 9

The role of pericardium

1. Delimits ___
2. Medial to ___
3. Fused to ___
4. Accommodates ___ → ____

Answer 9

1. middle mediastinum
2. pleurae
3. diaphragm
4. diastole → relaxation