Olfactory dysfunction in Alzheimer's disease and Parkinson's disease.
D000328:Adult; D000368:Aged; D000544:Alzheimer Disease / Q000503:physiopathology*; D004192:Discrimination, Psychological; D006801:Humans; D008875:Middle Aged; D009812:Odorants; D010300:Parkinson Disease / Q000503:physiopathology*; D012903:Smell / Q000502:physiology