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Making Sense of Taste How do cells on the tongue register the sensations of sweet, salty, sour and bitter? Scientists are finding out--and discovering how the brain interprets these signals as various tastes While loss of taste and smell is common in PD an article in the Scientific American discusses the mechanisms of taste. The article by David V. Smith and Robert F. Margolskee is located at: http://www.sciam.com/2001/0301issue/0301smith.html