title: Is yawning a brainstem phenomenon?
mesh_terms: D000818:Animals; D001933:Brain Stem / Q000502:physiology*; D004285:Dogs; D006801:Humans; D008526:Medulla Oblongata / Q000502:physiology; D051381:Rats; D011954:Receptors, Dopamine / Q000187:drug effects / Q000502:physiology; D015000:Yawning
chemical_list: D011954:Receptors, Dopamine