title: Descending control of pain transmission: possible serotonergic-enkephalinergic interactions.
mesh_terms: D000698:Analgesia; D000818:Animals; D001370:Axonal Transport; D001921:Brain / Q000502:physiology / Q000503:physiopathology; D002415:Cats; D004558:Electric Stimulation; D004723:Endorphins / Q000502:physiology*; D004745:Enkephalins / Q000502:physiology*; D010146:Pain / Q000503:physiopathology*; D011903:Raphe Nuclei / Q000502:physiology; D012701:Serotonin / Q000502:physiology*; D013116:Spinal Cord / Q000502:physiology; D009435:Synaptic Transmission
chemical_list: D004723:Endorphins; D004745:Enkephalins; D012701:Serotonin