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Erector Spinae
Region: Back Muscles · All back muscles
Erector Spinae at a glance
| Origin | Sacrum, iliac crest and spinous processes of the lower vertebrae (common tendon) |
|---|---|
| Insertion | Ribs, vertebrae and the skull (as iliocostalis, longissimus and spinalis columns) |
| Actions | Extends the spine (straightens the back); Tilts the trunk to the same side |
| Nerve supply | Dorsal rami of spinal nerves |
◆ Good to know
The main extensor mass of the back, lying in the groove between the spinous and transverse processes; it keeps the trunk upright against gravity.
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.