[Mechanisms involved in pain].
D001921:Brain / Q000503:physiopathology; D002490:Central Nervous System / Q000503:physiopathology*; D006801:Humans; D010146:Pain / Q000503:physiopathology*; D010525:Peripheral Nerves / Q000503:physiopathology; D013116:Spinal Cord / Q000503:physiopathology