Do different parts of the tongue taste different flavors?

No. The familiar tongue map, with sweet at the tip, salt and sour on the sides and bitter at the back, is a myth. Taste buds that detect each of the basic tastes are found across the tongue. Some regions are slightly more sensitive to certain tastes, but each region responds to all of them. Brian Lewandowski, a taste neuroscientist at the Monell Chemical Senses Center, says the differences are too small to play a clear role in taste perception, as reported by [brainfacts.org](https://www.brainfacts.org/thinking-sensing-and-behaving/taste/2018/do-different-parts-of-the-tongue-taste-different-things-010319). [health.harvard.edu](https://www.health.harvard.edu/diet-and-nutrition/the-myth-of-tongue-and-taste) and [my.clevelandclinic.org](https://my.clevelandclinic.org/health/body/22845-tongue) say the same. [1] [2] [3]

The map traces to a 1901 paper by the German scientist David Hänig. He dripped taste stimuli at intervals around the edges of the tongue and found that the amount needed for a taste to register varied by location. That finding is still considered generally correct. The trouble was his line graph, which plotted the change in sensitivity for each taste from one point to the next, not one taste against another. It was an artistic rendering, and it made it look as if different areas were responsible for different tastes. According to [smithsonianmag.com](https://www.smithsonianmag.com/science-nature/neat-and-tidy-map-tastes-tongue-you-learned-school-all-wrong-180963407/), the problem lay in the presentation, not in Hänig's measurements. [theconversation.com](https://theconversation.com/mondays-medical-myth-tongues-register-different-tastes-in-different-locations-1419) describes the same process: modest differences were overlooked over time and were wrongly read as four distinct regions. Researchers began debunking the idea in the 1970s. [4] [1] [5]

Nerve evidence points the same way. The front of the tongue is served by the chorda tympani and the back by the glossopharyngeal nerve. If sweetness were tasted only at the front, cutting the chorda tympani would remove it. Surgeon TR Bull found in 1965 that patients whose chorda tympani had been cut reported no loss of taste. In 1993, Linda Bartoshuk found that anesthetizing the nerve left sweet taste intact, and even made it more intense. [4]

Molecular biology agrees. Researchers have identified taste receptor proteins, and each receptor type is found across all taste areas of the mouth, not in separate zones. Taste-sensitive cells also occur beyond the tongue, in the soft palate and throat. Anatomy sources add that fungiform papillae sit on the front two thirds of the tongue and the larger circumvallate papillae sit in an inverted V at the back, while filiform papillae lack taste receptors. [4] [6]

Researchers agree that sensitivity varies somewhat, but not on exactly where. Harvard Health notes that the tongue's sides have more taste buds than its center, and that bitter-sensitive buds are especially concentrated at the back, presumably as a warning before swallowing something dangerous. The Conversation reports there is no universal agreement on the most sensitive area for each taste. In the two most comprehensive studies, sweet and salt were slightly better detected at the front and sides, and sour slightly better at the side toward the back. [2] [5]

Results differ because of several factors. Nerve cell numbers vary between people, taste bud density varies across the tongue, and studies stimulate areas of different sizes. Age matters too: children have more taste buds at the tip and are more sensitive to sweetness there, while people in their seventies show little difference between regions. [5]