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Iliocostalis Lumborum
Region: Back Muscles · All back muscles
Iliocostalis Lumborum at a glance
| Origin | Sacrum, iliac crest and thoracolumbar fascia (common erector tendon) |
|---|---|
| Insertion | Angles of the lower six or seven ribs |
| Actions | Extends the lumbar spine; Tilts the trunk to the same side |
| Nerve supply | Dorsal rami of lumbar spinal nerves |
◆ Good to know
The lateral column of erector spinae in the loin; part of the common tendon mass tested indirectly in back-extension exercises.
More Back Muscles
Please note: This page is an anatomy education summary for students and curious readers, not medical advice. Attachment points are given in their classic short form; individual anatomy varies, and detailed dissection-level descriptions belong in an anatomy atlas.