title: Pain.
mesh_terms: D000698:Analgesia; D000818:Animals; D002540:Cerebral Cortex / Q000503:physiopathology; D006801:Humans; D009020:Morphine / Q000494:pharmacology; D009434:Neural Pathways; D010146:Pain; D000699:Pain Insensitivity, Congenital / Q000503:physiopathology; D010525:Peripheral Nerves / Q000503:physiopathology; D013116:Spinal Cord / Q000503:physiopathology
chemical_list: D009020:Morphine