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Suggested ReadingThe Lumbosacral Joint or L5-S1About.com Health's Disease and Condition content is reviewed by our Medical Review Board
The Lumbosacral Joint or L5-S1The 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.
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