Sciatica (/saɪˈætɪkə/; sciatic neuritis, sciatic neuralgia, or lumbar radiculopathy) is a set of symptoms including pain caused by general compression or irritation of one of five spinal nerve roots of each sciatic nerve—or by compression or irritation of the left or right or both sciatic nerves.
Dr. Rodney McKay mentioned he is susceptible to Sciatica. (SGA: "Phantoms")