title: Neurotransmitter systems in aging and senile dementia.
mesh_terms: D000109:Acetylcholine / Q000378:metabolism; D000368:Aged; D000375:Aging; D000818:Animals; D001921:Brain / Q000378:metabolism; D002794:Choline / Q000627:therapeutic use; D002986:Clinical Trials as Topic; D003704:Dementia / Q000188:drug therapy / Q000378:metabolism*; D004298:Dopamine / Q000378:metabolism; D006801:Humans; D018377:Neurotransmitter Agents / Q000378:metabolism*; D009638:Norepinephrine / Q000378:metabolism; D005680:gamma-Aminobutyric Acid / Q000378:metabolism
chemical_list: D018377:Neurotransmitter Agents; D005680:gamma-Aminobutyric Acid; D002794:Choline; D000109:Acetylcholine; D004298:Dopamine; D009638:Norepinephrine