title: Recent developments in the neurochemical bases of pain and analgesia.
mesh_terms: D000698:Analgesia; D000818:Animals; D001933:Brain Stem / Q000502:physiology; D004558:Electric Stimulation; D004723:Endorphins / Q000502:physiology; D006801:Humans; D018377:Neurotransmitter Agents / Q000502:physiology; D009619:Nociceptors / Q000502:physiology*; D010146:Pain / Q000503:physiopathology*; D011957:Receptors, Opioid / Q000502:physiology
chemical_list: D004723:Endorphins; D018377:Neurotransmitter Agents; D011957:Receptors, Opioid