1. A method of treating discogenic lumbar back pain in a patient comprising: positioning a plurality of electrodes within an anterior epidural space of the patient to a position adjacent to a posterior longitudinal ligament and/or a posterior annulus fibrosus; generating one or more electrical impulses with a pulse generator; and transmitting the electrical impulses through said electrodes to one or more nerves in said posterior longitudinal ligament and/or said posterior annulus fibrosus; wherein the electrical impulses are sufficient to cause one or more sympathetic nerves in the posterior longitudinal ligament and/or in the posterior annulus fibrosus to inhibit an initiation and/or a transmission of an action potential in one or more nociceptive nerves in the posterior longitudinal ligament and/or in the posterior annulus fibrosus; and wherein the electrical impulses at least partially relieve the pain without producing irreversible damage in any tissue of the patient.