The five vertebra of the lower back, numbered L1 through L5. The L5 or lowest lumbar vertebra makes up the superior, or top portion, of the lumbosacral region and lumbosacral joint.
The five vertebra of the lower back, numbered L1 through L5. The L5 or lowest lumbar vertebra makes up the superior, or top portion, of the lumbosacral region and lumbosacral joint.
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