Anatomy of Thoracic Nerves and Arteries
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Questions and Answers

What is the origin of the posterior intercostal arteries in the lower 9 spaces?

  • Internal thoracic artery
  • Supreme intercostal artery
  • Descending thoracic aorta (correct)
  • Costocervical trunk of the subclavian artery

Which nerve has no anterior cutaneous branch?

  • 2nd Intercostal nerve
  • 1st Intercostal nerve (correct)
  • 3rd Intercostal nerve
  • Lateral cutaneous nerve

Which artery gives rise to the superior and lateral thoracic arteries?

  • Internal thoracic artery
  • Thoracic aorta
  • Axillary artery (correct)
  • Subclavian artery

What is the destination of the smaller branch of the 2nd thoracic spinal nerve?

<p>Brachial plexus (B)</p> Signup and view all the answers

What is the origin of the 1st and 2nd posterior intercostal arteries?

<p>Superior intercostal artery of the costocervical trunk (D)</p> Signup and view all the answers

What is the course of the 1st and 2nd intercostal nerves?

<p>They run on the internal surface of the 1st and 2nd ribs (C)</p> Signup and view all the answers

What is the origin of the transversus thoracis muscle?

<p>Internal surface of the costal cartilages 2-6 (C)</p> Signup and view all the answers

What is the function of the subcostal muscle?

<p>To elevate the ribs (A)</p> Signup and view all the answers

Which nerves supply the abdominal skin and muscles?

<p>7th-11th intercostal nerves (C)</p> Signup and view all the answers

What is the location of the internal intercostal muscles?

<p>Deep to the external intercostal membrane (A)</p> Signup and view all the answers

What is the function of the innermost intercostal muscle?

<p>Not mentioned in the text (B)</p> Signup and view all the answers

Which of the following arteries branches from the thoracic aorta?

<p>Costocervical trunk (A)</p> Signup and view all the answers

Which of the following vessels drains into the left brachiocephalic vein?

<p>Left superior intercostal vein (B)</p> Signup and view all the answers

Which of the following arteries is responsible for supplying the upper 6 anterior intercostal spaces?

<p>Internal thoracic artery (D)</p> Signup and view all the answers

Which of the following veins drains into the azygos vein?

<p>Right superior intercostal vein (D)</p> Signup and view all the answers

Which of the following arteries supplies the 7th to 9th anterior intercostal spaces?

<p>Musculophrenic artery (A)</p> Signup and view all the answers

Which of the following veins drains into the accessory hemiazygos vein?

<p>5th-8th posterior intercostal veins (B)</p> Signup and view all the answers

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