title: Electrical and chemical stimulation of the CNS by direct means for pain control: present and future.
mesh_terms: D000700:Analgesics / Q000008:administration & dosage*; D001921:Brain / Q000503:physiopathology; D002552:Cerebral Ventricles; D004599:Electric Stimulation Therapy / Q000379:methods*; D004567:Electrodes, Implanted; D004723:Endorphins / Q000502:physiology; D006801:Humans; D007278:Injections, Spinal; D018377:Neurotransmitter Agents / Q000502:physiology; D010148:Intractable Pain / Q000503:physiopathology / Q000628:therapy*; D019736:Prostheses and Implants; D013116:Spinal Cord / Q000503:physiopathology
chemical_list: D000700:Analgesics; D004723:Endorphins; D018377:Neurotransmitter Agents