Below the sacrum is the coccyx bone.
The L5-S1 junction is where the injury spondylolisthesis occurs.
The Lumbosacral Joint or L5-S1
By Anne Asher, About.com Guide
Updated December 05, 2005
About.com Health's Disease and Condition content is reviewed by our Medical Review Board
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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.
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