L5-S1 disc space

What does "L5-S1 disc space" 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.

Explanation

The "L5-S1 disc space" refers to a specific area in the lower back. It's the space between the last bone of the spine (called the lumbar region, or L5) and the first bone of the sacrum, which is the bony structure at the base of the spine (S1). This space contains a disc, which is a soft, cushion-like pad that helps absorb shock and allows for movement between these bones. Any issues with this disc, such as damage or wear and tear, can cause lower back pain.

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