It sounds like what you are talking about is a lumbarized S1, or the presence of 6 lumbar vertebrae. When you are talking about S1-S2, is that what some might refer to as L6-S1? You have a functioning disc and facet joints at this 6th level? Your question is well taken... if its not moving, why are facets arthritic???
Has anyone considered trying discography there?
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