Vascular anatomy · USMLE Step 1

A trauma patient suffers damage to the vessel that passes between the anterior and middle scalene muscles. Which vessel is this?

  1. Subclavian vein
  2. Subclavian artery
  3. Internal thoracic artery
  4. External carotid artery
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Correct answer: Subclavian artery

The subclavian artery passes between the anterior and middle scalene muscles. This location is significant in thoracic outlet syndrome.

Difficulty: Medium Question 20 of 20

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