The facet joints are at the back of the spine with two at each spinal level.   They're about as big as small finger joints and help guide movement of the spine.   They are compressed when you bend backwards and/or turn or bend to the side all the way.  Bending forward takes the weight off the joints.  Traction will also take weight off these joints.  When the facets are injured, they can cause a facet syndrome.

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