title: Involvement of the periaqueductal gray matter and serotonin in the analgesia produced by stimulation of the nucleus tractus solitarius.
mesh_terms: D000698:Analgesia; D000818:Animals; D004558:Electric Stimulation; D008297:Male; D008526:Medulla Oblongata / Q000502:physiology*; D010487:Periaqueductal Gray / Q000502:physiology*; D051381:Rats; D011919:Rats, Inbred Strains; D012701:Serotonin / Q000502:physiology*
chemical_list: D012701:Serotonin