Thoracic Wall Vasculature

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Thoracic wall vasculature

Questions and Answers

1.

On the left side the 9th posterior intercostal vein drains to the
- A.
  
  Hemiazygos vein
- B.
  
  Azygos vein
- C.
  
  Accessory hemiazygos vein
- D.
  
  Inferior vena cava
Correct Answer
A. Hemiazygos vein
2.

On the right side the 6th posterior intercostal vein drains to the accessory hemiazygos vein.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The 6th posterior intercostal vein drains to the azygos vein on the RIGHT, but to the accessory hemiazygos vein on the LEFT.

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3.

The 10th anterior intercostal artery is derived from the musculophrenic artery.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
There are only 9 anterior intercostal arteries. The 10th and 11th intercostal spaces are supplied by posterior intercostal branches.

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4.

The highest structure in the neurovascular plane of the intercostal space is the intercostal vein.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The intercostal vein, artery and nerve are arranged in a high to low manner respectively within the costal groove. The opposite is seen with the collateral branches.

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5.

Which is NOT a direct branch of the posterior intercostal artery?
- A.
  
  Spinal branch
- B.
  
  Dorsal branch
- C.
  
  Collateral branch
- D.
  
  Muscular branch
Correct Answer
A. Spinal branch

Explanation
The posterior intercostal artery gives off 3 branches: the muscular, collateral and dorsal branches. The dorsal branch of the posterior intercostal artery gives a spinal branch.

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6.

Which artery assists the supreme intercostal artery in supplying the 1st and 2nd posterior intercostal spaces?

Correct Answer
Superior thoracic artery
Superior thoracic

Explanation
The superior thoracic artery is a branch off the 1st part of the axillary artery. It courses along the superior border of pectoralis minor towards the thoracic wall to assist the supreme intercostal artery (from the costocervical trunk) in supplying the 1st and 2nd intercostal spaces.

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4
7.

The internal thoracic artery gives off a medial mammary branch to supply the medial breast.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The anterior cutaneous branch of the anterior intercostal perforating artery gives off a medial mammary branch to supply the medial breast.

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8.

The subcostales muscles hold the internal thoracic vessels against the anterior thoracic wall.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The transversus thoracis muscles hold the internal thoracic vessels against the anterior thoracic wall. [the subcostales muscles are present on the posterior thoracic wall]

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9.

The ___________ vein is the final contributary to the azygos vein before it enters the superior vena cava.

Correct Answer
Superior intercostal
Superior intercostal vein
10.

Which arteries arise from the axillary artery to supply external areas of the thoracic wall?
- A.
  
  Costocervical trunk
- B.
  
  Internal thoracic artery
- C.
  
  Lateral thoracic artery
- D.
  
  Superior thoracic artery
Correct Answer(s)
C. Lateral thoracic artery
D. Superior thoracic artery

Explanation
The superior thoracic artery arises from the 1st part of the axillary artery and the lateral thoracic artery arises from the 2nd part.
The internal thoracic artery and costocervical trunk both arise from the subclavian artery.

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11.

The neurovascular bundle lies between the ______ and _______ intercostal muscle layers
- A.
  
  External
- B.
  
  Internal
- C.
  
  Innermost
Correct Answer(s)
B. Internal
C. Innermost
12.

Where do the anterior intercostal arteries arise from?
- A.
  
  Internal thoracic artery
- B.
  
  Supreme intercostal artery
- C.
  
  Musculophrenic artery
- D.
  
  Superior epigastric artery
Correct Answer(s)
A. Internal thoracic artery
C. Musculophrenic artery
13.

The azygos vein is formed from the ______ and _______ at the level of the _____ vertebra.
- A.
  
  Ascending lumbar vein, subcostal vein, L1
- B.
  
  Ascending lumbar vein, 1st lumbar vein, T12
- C.
  
  Ascending lumbar vein, subcostal vein, T12
- D.
  
  Ascending lumbar vein, 1st lumbar vein, L1
Correct Answer
C. Ascending lumbar vein, subcostal vein, T12

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Current Version
Mar 20, 2015

Quiz Edited by
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Mar 13, 2015

Quiz Created by
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Thoracic Wall Vasculature

On the left side the 9th posterior intercostal vein drains to the

On the right side the 6th posterior intercostal vein drains to the accessory hemiazygos vein.

The 10th anterior intercostal artery is derived from the musculophrenic artery.

The highest structure in the neurovascular plane of the intercostal space is the intercostal vein.

Which is NOT a direct branch of the posterior intercostal artery?

Which artery assists the supreme intercostal artery in supplying the 1st and 2nd posterior intercostal spaces?

The internal thoracic artery gives off a medial mammary branch to supply the medial breast.

The subcostales muscles hold the internal thoracic vessels against the anterior thoracic wall.

The ___________ vein is the final contributary to the azygos vein before it enters the superior vena cava.

Which arteries arise from the axillary artery to supply external areas of the thoracic wall?

The neurovascular bundle lies between the and _ intercostal muscle layers

Where do the anterior intercostal arteries arise from?

The azygos vein is formed from the __ and _ at the level of the ___ vertebra.

Thoracic Wall Vasculature

On the left side the 9th posterior intercostal vein drains to the

On the right side the 6th posterior intercostal vein drains to the accessory hemiazygos vein.

The 10th anterior intercostal artery is derived from the musculophrenic artery.

The highest structure in the neurovascular plane of the intercostal space is the intercostal vein.

Which is NOT a direct branch of the posterior intercostal artery?

Which artery assists the supreme intercostal artery in supplying the 1st and 2nd posterior intercostal spaces?

The internal thoracic artery gives off a medial mammary branch to supply the medial breast.

The subcostales muscles hold the internal thoracic vessels against the anterior thoracic wall.

The ___________ vein is the final contributary to the azygos vein before it enters the superior vena cava.

Which arteries arise from the axillary artery to supply external areas of the thoracic wall?

The neurovascular bundle lies between the ______ and _______ intercostal muscle layers

Where do the anterior intercostal arteries arise from?

The azygos vein is formed from the ______ and _______ at the level of the _____ vertebra.

The neurovascular bundle lies between the and _ intercostal muscle layers

The azygos vein is formed from the __ and _ at the level of the ___ vertebra.