Taste buds cover the surface of small, nipple-like projections called, papillae, which are easily visible. There are a number of problems that can develop with the tongue. These include: Nerve damage that inhibits tongue movement and can make speaking and chewing difficult
In the decades since the tongue map was created, many researchers have refuted it. Indeed, results from a number of experiments indicate that all areas of the mouth containing taste buds – including several parts of the tongue, the soft palate (on the roof of your mouth) and the throat – are sensitive to all taste qualities.
While some parts of the tongue may be able to detect a taste before the others do, all parts are equally capable of conveying the qualia of all tastes. Threshold sensitivity may differ across the tongue, but intensity of sensation does not.