PROLAPSED DISK - A condition that results in the abnormal protrusion (bulging), herniation, or prolapse of a vertebral disc from it's normal position in the vertebral column. The displaced disc may exert force on a nearby nerve root causing the typical neurologic symptoms of radiating pain (to an extremity), numbness, tingling, and weakness. Recurrent episodes of severe back pain are common. Treatment includes nonsteroidal anti-inflammatories, corticosteroids, and rest. More advanced cases may require surgical intervention (e.g. laminectomy, micro-disc surgery).