Degenerative disc disease Spondylosis Spondylitis Spondylolysis Spondylolisthesis Spondylosis; occurs maximmally in the lower cervical & lower lumber regions Results from degeneration of the intervertebral disc. The degenerated disc may herniate & press on the S.C. & nerve roots causing pain & neurological deficits. The degen. discs often stimulate formation of osteophytes which together with soft tissue thickening may press upon the SC or nerve roots. OA of the facet joints (apophyseal joints) may aggravate the condition.