Iliocostalis Muscle Flashcards

Flashcards are a great way to memorise information about the iliocostalis muscle. Test your knowledge of anatomy using the iliocostalis flashcards below.

Press a flash card to reveal the answer.

Iliocostalis Cervicis Origin

Angle of ribs 3-6

Iliocostalis Thoracis Origin

Angle of ribs 7-12

Iliocostalis Lumborum Origin

Medial end of iliac crest, lateral crest of sacrum, thoracolumbar fascia

Iliocostalis Cervicis Insertion

Transverse process of C4-C6

Iliocostalis Thoracis Insertion

Transverse process of C7 & angles of ribs 1-6

Iliocostalis Lumborum Insertion

Transverse processes L1-L4 & angles of ribs 4-12


  • Unilateral contraction: lateral flexion of the trunk/vertebral column & weak lateral flexion at the base of the neck (below C4)
  • Bilateral contraction: extends the trunk/vertebral column & weak extension of the base of the neck (below C4)


  • Lateral branches of the posterior rami of the spinal nerves

Blood Supply

  • Dorsal branches of the posterior intercostal, subcostal, lumbar & lateral sacral arteries

Would you like to learn more about the iliocostalis muscle? Then check out the iliocostalis muscle article and video by clicking the link below:
Iliocostalis Muscle Anatomy

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