| Origin | Function | |
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The erector spinae muscle group originates on the crest of the ilium, the lower surface of the sacrum, the borders of the lower seven ribs, the spinous processes of all the lumbar and the lower four thoracic vertebrae, and the transverse processes of all the thoracic vertebrae. | The erector spinae muscle group originates on the crest of the ilium, the lower surface of the sacrum, the borders of the lower seven ribs, the spinous processes of all the lumbar and the lower four thoracic vertebrae, and the transverse processes of all the thoracic vertebrae. |