Anatomical hierarchy

General Anatomy > Muscles; Muscular system > Muscles of thorax > Innermost intercostal muscle



Artery: Intercostal arteries

Nerve: Intercostal nerves


The innermost intercostal muscle is a layer of intercostal muscles deep to the plane that contains the intercostal nerves and intercostal vessels and the internal intercostal muscles.

It may be divided into:

  • transversus thoracis anteriorly
  • lateral muscle slips laterally (which cross a single intercostal space)
  • subcostalis posteriorly (which often cross more than one intercostal space)

This definition incorporates text from the wikipedia website - Wikipedia: The free encyclopedia. (2004, July 22). FL: Wikimedia Foundation, Inc. Retrieved August 10, 2004, from


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