Mediastinum

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Author:
ashleesumilat
ID:
290519
Filename:
Mediastinum
Updated:
2014-12-03 02:41:07
Tags:
grossanatomy
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Description:
mediastinum
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  1. What levels does the aortic arch begin and end?
    Sternal angle --> T4
  2. Components on L of aorta
    • 1. L phrenic n.
    • 2. L vagus/L recurrent pharyngeal n.
    • 3. L superior intercostal v.
    • 4. cardiac nn.
  3. Components on R of aorta
    • 1. L recurrent pharyngeal n.
    • 2. bifurcation of trachea
    • 3. thoracic duct
    • 4. esophagus
    • 5. SVC
    • 6. cardiac plexus
  4. Branches of aortic arch
    • 1. Brachiocephalic
    • 2. L common carotid
    • 3. L subclavian
  5. Contents of superior mediastinum
    • 1. arch of aorta + its 3 branches
    • 2. ligamentum arteriosum
    • 3. phrenic nn. (R is along venous plane // L is along arterial plane)
    • 4. vagus nn. + L laryngeal n.
    • 5. sympathetic chain
    • 6. trachea
    • 7. esophagus
    • 8. thoracic duct
  6. Relations to esophagus
    • Anterior: trachea, pericardium
    • (L): recurrent laryngeal n.
    • Posterior: vertebral column, vv.
    • Laterally: lungs, aorta on (L)
  7. Boundaries of posterior mediastinum
    • Posterior: vertebral column
    • Anterior: pericardial sac
    • Superior: sternal angle/T4
    • Inferior: diaphragm
  8. Contents of posterior mediastinum
    • 1. Esophagus
    • 2. Vagus n.
    • 3. Thoracic aorta
    • 4. Thoracic duct
    • 5. Azygous system
    • 6. Sympathetic chain -- rami communicantes + splanchnic nn.
  9. Blood supply to esophagus
    • 1. Inferior thyroid aa.
    • 2. Esophageal branches of aorta
    • 3. Superior and inferior phrenic aa.
    • 4. L gastric a.
  10. Branches of thoracic a.
    • - posterior intercostals
    • - bronchial aa.
    • - esophageal aa.
    • - pericardial branches

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