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The afferent activity of the facial portion of the chorda‐lingual nerve, the chorda tympani proper, and the glossopharyngeal nerves was recorded during the application of 0.02 % and 0.005 % solutions of Monellin (2times 10 ‐5 and 5times 10 ‐6 M) and Thaumatin (10‐ 5 and 2.1) × 10 ‐6 M) and of 0.5 M sucrose, 0.3 M NaCl and 0.03 M citric acid, representing the three taste qualities sweet, salt and acid. Monellin and Thaumatin, which give a sweet sensation in man, elicited a significant electrophysiological response in the monkey which showed several characteristics that could be related to psychophysical observations in man. In guinea pig and rat little or no response could be recorded.
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Brouwer et al. (1973) studied this question.
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