Scientists have classically defined specific regions of your tongue that detect the primary tastes: sweet on the tip, salty on the front edge, sour on the sides and bitter in the back. Supposedly, the fifth taste, umami, is detected way at the back. But many people have opposed the taste segregations, saying they can taste sweet on the sides of their tongues, for example. More recent research by Virginia Collings has determined that you can distinguish any taste on any part of your tongue that has taste receptors, although some areas may be more sensitive to certain tastes.
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