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erector spinae
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muscles of the back; human muscle system
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muscles of the back; human muscle system
muscles of the back; human muscle system Muscles of the back.

erector spinae

anatomy
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Also known as: sarcospinalis muscle
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erector spinae, a deep muscle of the back; it arises from a tendon attached to the crest along the centre of the sacrum (the part of the backbone at the level of the pelvis, formed of five vertebrae fused together). When it reaches the level of the small of the back, the erector divides into three columns, each of which has three parts. The muscle system extends the length of the back and functions to straighten the back and to rotate it to one side or the other.

This article was most recently revised and updated by Kara Rogers.