The traditional tongue map assigning taste sensitivities to specific tongue regions is a myth.

“So let's start by the banking that old tale and myth. - Who came up with that? - There are many views, but the most prevalent is that there was an original drawing describing the sensitivity of the tongue to different tastes. ... And the argument that has emerged is that there is a good likelihood that the data was simply mistranslated as it was being drawn. And of course, that led to an entire industry. ... But the notion that all sweet is in the front and salt is on the side. It's not real.”