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Anatomy: Transversus Thoracic Muscle and Innermost Intercostal Muscle
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Anatomy: Transversus Thoracic Muscle and Innermost Intercostal Muscle

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Questions and Answers

What is the action of the innermost intercostal muscle?

  • Depresses the ribs during expiration
  • Contracts during forced expiration
  • Elevates the ribs during inspiration
  • Stabilizes the bony thorax (correct)

    • Which muscle depresses the ribs during expiration?

  • Innermost intercostal muscle
  • External intercostal muscle
  • Subcostal muscle
  • Transversus thoracic muscle (correct)

    • Where does the subcostal muscle have its inferior attachment?

  • Internal surface of the rib above
  • External surface of the rib below (correct)
  • External surface of the rib above
  • Internal surface of the xiphoid process

    • Which muscle is active in forced inspiration by elevating the ribs below?

    <p>Subcostal muscle</p> Signup and view all the answers

    What nerve innervates the innermost intercostal muscle?

    <p>Intercostal nerve at the intercostal space</p> Signup and view all the answers

    Which muscle attaches along the inner surface of the costal cartilage of ribs 2-6?

    <p>Transversus thoracic muscle</p> Signup and view all the answers

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