HERNIATED DISK, X-RAY. HERNIATED DISK, X-RAY A herniated disc occurs when an intervertebral disc protrudes beyond its normal position. Each disc has a gelatinous center surrounded by a ring-like structure composed of fibers holding the vertebral bodies together. If this fibrous ring is fissured, the nucleus can protrude and compress a nerve root or the spinal cord (as seen here). Herniated discs are generally seen in the lumbar spine (L4 and L5), often after lifting a heavy load or a strenuou