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Sacrum - Sacral

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Updated May 22, 2005

Definition: The sacrum is a triangular bone located at the bottom of the spine. Because of its position between the 2 hip bones, the sacrum functions as a keystone (or wedge), stabilizing the bony pelvis.

There are no muscles that cross over the sacrum. This means that sacroiliac joints depend on biomechanical balance for a healthy alignment.

The sacral curve is a kyphosis.

Also Known As: sacral spine
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