title: The mechanisms of pain.
mesh_terms: D001921:Brain / Q000503:physiopathology; D004723:Endorphins / Q000502:physiology; D004745:Enkephalins / Q000502:physiology; D006801:Humans; D010146:Pain / Q000503:physiopathology*; D013116:Spinal Cord / Q000503:physiopathology
chemical_list: D004723:Endorphins; D004745:Enkephalins