The transfer of disc pressure to adjacent discs in discography: a specificity problem?

Study Design: In vivo experimental study.

Objective: The primary objective of the study was to investigate pressure transmission to adjacent discs during discography. A secondary objective was to quantify the transmitted pressure, both in contrast injected and noninjected porcine intervertebral discs.

The narrowing of the lumbar spinal canal during loaded MRI: the effects of the disc and ligamentum flavum.

Load and activity changes of the spine typically cause symptoms of nerve root compression in subjects with spinal stenosis. Protrusion of the intervertebral disc has been regarded as the main cause of the compression. The objective was to determine the changes in the size of the lumbar spinal canal and especially those caused by the ligamentum flavum and the disc during loaded MRI.