Stages of Disc Herniation
Disc herniation may develop gradually over the period of months or years. Some time it is realized suddenly with or without any traumatic cause. There are 4 (Four) stages of herniated disc, such as Disc Degeneration, Prolapse, Extrusion, Sequestered Disc or Sequestration
1) Disc Degeneration: Due to aging process Chemicals of the disc gets changes and causes weakness of the disc wall, but in this condition internal disc material does not herniate.
2) Prolapse: In this condition the position or shape of the disc changes with some slight impingement into the spinal canal and/or spinal nerves. This stage is also called a protruding disc or a bulging disc .
3) Extrusion: In this condition nucleus pulposus (internal gel like substance of the disc) breaks through annulus fibrosus (tire-like outer wall of disc ) but remains within cover of the disc.
4) Sequestered Disc or Sequestration: In this condition the nucleus pulposus breaks through the annulus fibrosus and then can go out of the intervertebral disc.
Some other relevent post: Cause of Disc Herniation