One of the most common reasons for laminectomy is intervertebral disc herniation. If the herniated disc is in the lumbar region, this can cause sharp and continuing back pain, a weakening of the muscles in the leg, and some loss of sensation in the leg and foot. It may also be difficult to raise the leg when it is held in a straight position. A herniated disc in the neck region can cause symptoms including pain, numbness and weakness in the arm. A herniated disc may be triggered by twisting the back while lifting something heavy. During the spine surgery, the surgeon will attempt to relieve the pressure on nerves and nerve roots by removing the pulpy material that is protruding from the disc.