Iliocostalis lumborum at a glance
- What it is
- The lumbar part of the iliocostalis column of erector spinae.
- Location
- Origin: sacrum, iliac crest and thoracolumbar fascia. Insertion: angles of the lower six or seven ribs.
- Function
- Extends the vertebral column and bends it laterally.
- Body system
- Muscular · paired (left and right)
- FMA ID
- FMA22740 (Foundational Model of Anatomy)
Key facts
- Innervation: posterior rami of spinal nerves
- It is the lowest and largest part of iliocostalis, the lateral column of erector spinae.
- It is covered by the thoracolumbar fascia, which also gives it origin.
Structures next to the iliocostalis lumborum
The nearest named structures in the 3D model, measured from the centre of each part:
- Serratus posterior inferior · muscular
- Twelfth rib · skeletal
- Subcostal vein · cardiovascular
- Eleventh rib · skeletal
- Lumbar rotator · muscular
- Subcostal artery · cardiovascular
- Kidney · urinary
- Suprarenal vein · cardiovascular
- First lumbar vertebra · skeletal
- Anterior division of renal artery · cardiovascular
References
- Foundational Model of Anatomy: Iliocostalis lumborum (FMA22740). EMBL-EBI Ontology Lookup Service.
- OpenStax. Anatomy and Physiology 2e, §11.2 Naming Skeletal Muscles. Rice University, 2022.
- Mitsuhashi N. et al. (2009). BodyParts3D: 3D structure database for anatomical concepts. Nucleic Acids Research 37, D782–D785. Data © The Database Center for Life Science, CC BY 4.0.
Related anatomy
Explore the whole body in the interactive 3D human anatomy model, or browse the A–Z list of human structures.