title: Pain and symptom control: I.
mesh_terms: D001921:Brain / Q000503:physiopathology*; D006801:Humans; D009619:Nociceptors / Q000503:physiopathology*; D010146:Pain / Q000503:physiopathology*; D012684:Sensory Thresholds; D013116:Spinal Cord / Q000503:physiopathology*; D009435:Synaptic Transmission