Thorax Relationships

Question 1

The right vagus nerve runs posteroinferiorly through the superior mediastinum on the _____ side of the trachea. It then passes ______ to the right brachiocephalic vein, SVC, and root of the right lung.

Answer 1

• on the right side of the trachea
• posterior to the right brachiocephalic vein, SVC, and root of the right lung.
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  p. 284 Rohen

Question 2

The right recurrent laryngeal nerve hooks around the _________ artery and ascends between the _____ and ______ to supply the ______.

Answer 2

-right subclavian artery
-ascends between the trachea and esophagus to supply the larynx.
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209 Netter

Question 3

At the level of the _____ border of the _____ right/left? costal cartilage, the brachiocephalic veins unite to form the SVC

Answer 3

inferior border of the 1st right costal cartilage

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Question 4

The left vagus nerve (LVN) descends in the neck _______ to the left common carotid artery. It enters the mediastinum between the ________ and ________.

Answer 4

• posterior to the left common carotid artery
• between the left common carotid artery and left subclavian artery.
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Question 5

Each phrenic nerve enters the superior mediastinum between the _______ artery and the origin of the ________.

Answer 5

between the subclavian artery and the origin of the brachiocephalic vein.
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Question 6

How can you tell the difference between the phrenic nerves and vagus nerves in the mediastinum?

Answer 6

The fact that the phrenic nerves pass ANTERIOR TO THE ROOTS OF THE LUNGS provides an important means of distinguishing them from the vagus nerves, which pass POSTERIOR TO THE ROOTS.
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Question 7

Which to structures pass immediately posterior to the bifurcation of the trachea?

Answer 7

Esophagus (R) and descending aorta (L)

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Question 8

The ______ brachiocephalic vein is more than twice as long as the ______ brachiocephalic vein. Why?

Answer 8

The left brachiocephalic vein is more than twice as long as the right brachiocephalic vein because it passes from the left to the right side, anterior to the roots of the three major branches of the arch of the aorta.
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Question 9

1. ) The SVC lies in the ______ side of the superior mediastinum, ______ to the trachea and _______ to the ascending aorta.
2. ) The ________ lies between the SVC and the mediastinal pleura.
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Answer 9

1. ) The SVC lies in the right side of the superior mediastinum, anterolateral to the trachea and posterolateral to the ascend- ing aorta.
2. ) The right phrenic nerve lies between the SVC and the mediastinal pleura of the lungs.

Question 10

The arch of the azygos vein occupies a position corresponding to the ______ on the ______ side of the trachea over the _______________.

Answer 10

The arch of the azygos vein occupies a position cor- responding to the aorta on the right side of the trachea over the root of the right lung.
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Question 11

The brachiocephalic trunk, the first and largest branch of the arch of the aorta, arises _______ to the manubrium, where it is _______ to the trachea and ______ to the ________ brachiocephalic vein.

Answer 11

arises posterior to the manubrium, where it is anterior to the trachea and posterior to the left brachiocephalic vein
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