You are first of all describing secionts in your Lurabar region. The L means Lurabar for lower back region.
The facets are joints that connect one level to the next level in the spine. Joints that deal with Flexion and Extension. Moving forward or backwarRAB. We all go thru some changes within our spine as we age. Degenerative changes are changes that occur over time. As compared to changes due to trauma such as an accident or fall.
Are you noticing any symptoms as a result of these changes? Pain? Why was an MRI done?