Discography for Diagnosing Spinal Disorders
The inter-vertebral disc, the primary weight bearing structure of the spine, is recognized as a common source of low back pain. Initially, chronic low back pain was thought to be caused by nerve root compression. However, MRI scans failed to show compression of nerves even in the presence of sciatica. Such sensitivity has been documented by eliciting pain by pressing on the back wall of the disc during lumbar surgery in an awake patient. Such sensitivity has also been documented during pressure-controlled discography, leading to the identification of a low pressure sensitive disc.