title: Nociception: pathways and mechanisms--an update.
authors.affiliation: College of Medicine, University of Iowa, Iowa City 52242.
authors.forename: A K
authors.initials: AK
authors.lastname: Afifi
authors.forename: W W
authors.initials: WW
authors.lastname: Kaelber
mesh_terms: D001921:Brain / Q000502:physiology; D006801:Humans; D009434:Neural Pathways / Q000502:physiology; D009619:Nociceptors / Q000502:physiology; D010146:Pain / Q000503:physiopathology*; D013116:Spinal Cord / Q000502:physiology