Multiple choice

Which muscle is not punctured while doing a thoracic procedure in the mid-axillary line?

  1. Innermost intercostals

  2. Transverses thoracis

  3. External intercostals

  4. Internal intercostals
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In the mid-axillary line, a thoracic procedure would puncture through the following muscle layers from superficial to deep: external intercostal, internal intercostal, and innermost intercostal. The transversus thoracis muscle is located on the inner surface of the anterior thoracic wall and would NOT be encountered in the mid-axillary line approach.

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