Disc Herniation
Herniation of the disc is a medical condition affecting the spine in which the inner central portion (nucleus pulposus) of the spinal disc is forced out through a tear in the outer, fibrous ring (annulus fibrosus) of an intervertebral disc.
Herniated disc is also known as a bulging disc, ruptured disc or slipped disc. Four degrees of disc herniation include nuclear herniation, disc protrusion, nuclear extrusion and sequestered nucleus.