Facts: Plaintiff is a 43 year old women who was driving her motor vehicle which was struck in the rear by another car. Plaintiff suffered thoracic and lumbar herniated discs requiring a posterolateral spinal fusion at T11 – L2, segmental pedicle fixation at T11-L2 and an iliac crest bone graft. Defendant conceded liability but claimed the injury was degenerative as there was no visible damage to the motor vehicle plaintiff was operating.