Taste localization on the tongue, palate, and pharynx of normal man.

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Abstract
Detection and recognition thresholds for representatives of the salt, sweet, bitter, and sour modalities of taste were determined on the tongue, palate, and in the pharynx of 11 normal volunteers before and after anesthetization of the tongue, or hard and soft palate, or both. After the tongue was anesthetized detection thresholds for salt and sweet increased 25-fold, recongition thresholds increased 5- to 10-fold; there was no alteration in either threshold for sour or bitter. After the palate was anesthetized there was no significant alteration in either threshold for salt or sweet; however, detection thresholds for sour increased 6-fold while recogni-tion thresholds for both sour and bitter increased more than 5-fold. The data demonstrate 1) that each of the four modalities of taste is appreciated separately on the tongue, palate, and pharynx of man and 2) that sensitivity for the salt and sweet tastes is greatest on the tongue while sensitivity for the sour and bitter tastes is greatest on the palate.

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