title: [Pain mechanisms--historical background and current topics (author's transl)].
mesh_terms: D000698:Analgesia; D000818:Animals; D001921:Brain / Q000502:physiology; D001923:Brain Chemistry; D002415:Cats; D004525:Efferent Pathways / Q000502:physiology; D004723:Endorphins / Q000032:analysis; D005727:Ganglia, Spinal / Q000502:physiology; D000882:Haplorhini; D049670:History, 17th Century; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009020:Morphine / Q000494:pharmacology; D009482:Neurophysiology / Q000266:history; D009619:Nociceptors / Q000502:physiology*; D010146:Pain; D010525:Peripheral Nerves / Q000502:physiology; D051381:Rats; D013004:Somatostatin / Q000502:physiology; D013116:Spinal Cord / Q000502:physiology; D013133:Spinothalamic Tracts / Q000502:physiology; D013373:Substance P / Q000502:physiology; D013787:Thalamic Nuclei / Q000502:physiology
chemical_list: D004723:Endorphins; D013373:Substance P; D013004:Somatostatin; D009020:Morphine