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The Lumbosacral Joint or L5-S1

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Updated December 05, 2005

The Lumbosacral Joint or L5-S1
The lumbar spine rests upon the sacrum. The place where they meet is called the lumbosacral joint, or L5-S1.

Below the sacrum is the coccyx bone.

The L5-S1 junction is where the injury spondylolisthesis occurs.

Anatomy of the Low Back - Structures Involved in Lower Back Pain
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