Subcostal muscle

Dr Henry Knipe et al.

The subcostal muscle has variable anatomy and forms part of the intercostal muscle group. It lies on the deep surface of the innermost intercostal muscle in the posterior chest, near the angles of the ribs, usually running over 2-3 intercostal spaces. It is most common in the upper (1-4) and lower (9-11) intercostal spaces. Studies have shown a mean of 5 subcostal muscles per person, and they have either a band-like or fan-like shape. 


Thoracic anatomy
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Article Information

rID: 49066
System: Chest
Section: Anatomy
Tags: refs, cases
Synonyms or Alternate Spellings:
  • Subcostal muscles
  • Subcostalis muscle
  • Subcostalis muscles

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