Back & Neck Pain

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The Lumbar Spine

By Anne Asher, About.com

Updated June 13, 2005

About.com Health's Disease and Condition content is reviewed by our Medical Review Board

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The Sacrum

The sacrum is a flat triangular bone located below the lumbar spine. It functions as a wedge between the 2 hip bones on either side of it, stabilizing the entire pelvic area. Many nerves exit out holes on each side of the sacrum, including the sciatic nerve, which is the source of pain for sufferers of sciatica.

The spinal curve reverses at the sacrum. The sacral curve is a kyphosis.

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Back & Neck Pain

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