Electrogustometry involves electrically stimulating the surface of the tongue to trigger a sensation of taste. The stimulation uses a current of varying intensity, from 1.5 to 250 µA. The perception of a taste impression helps to affirm the integrity of the taste passages. The perceived impression is that of a metallic / sour taste. Used in different fields, electrogustometry makes it possible to study separately the different innervation territories of the oral and pharyngeal cavity. Electrical intensities lower than 100µA do not cause any nervous stimulation at the level of the trigeminal nerve, but only electrolysis of the saliva, therefore the appearance of a taste, which makes it possible not to confuse gustatory sensitivity with sensitive sensitivity.
The purpose of this measurement is to measure the lowest possible electrical intensity that will cause the appearance of the most subtle taste that a person is able to detect, much like sound in hearing tests. And by carrying out this test regularly, you will be able to follow the evolution of a person's taste sensitivity according to an illness or a drug dosage.