Espiral Atlas
MuscleThorax

Internal intercostal muscles

musculi intercostales interni

The interosseous portion depresses the ribs; the intercartilaginous portion elevates them. They act in forced expiration. They keep the intercostal spaces rigid.

Thorax – 3D human anatomy atlas

In the full entry

The full entry, with every field, sources, quiz and clinical correlations, is in the atlas.

  • Origin
  • Insertion
  • Innervation
  • Blood supply

Related clinical cases

  • Thoracotomy and the intercostal space

Other structures in this region

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