What does "L5-S1 level" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.
The term "L5-S1 level" refers to a specific location in the lower part of the spine. This area is where the last lumbar vertebra (L5) and the first sacral vertebra (S1) meet. In simpler terms, it's the area where the lower back meets the tailbone.
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